WO2012104992A1 - Dispositif optique à semi-conducteurs - Google Patents

Dispositif optique à semi-conducteurs Download PDF

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Publication number
WO2012104992A1
WO2012104992A1 PCT/JP2011/052011 JP2011052011W WO2012104992A1 WO 2012104992 A1 WO2012104992 A1 WO 2012104992A1 JP 2011052011 W JP2011052011 W JP 2011052011W WO 2012104992 A1 WO2012104992 A1 WO 2012104992A1
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WIPO (PCT)
Prior art keywords
guide
substrate
electrode
organic
photoelectric conversion
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PCT/JP2011/052011
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English (en)
Japanese (ja)
Inventor
佑生 寺尾
泰裕 高橋
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パイオニア株式会社
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Priority to JP2011546509A priority Critical patent/JP4932068B1/ja
Priority to PCT/JP2011/052011 priority patent/WO2012104992A1/fr
Publication of WO2012104992A1 publication Critical patent/WO2012104992A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K39/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00
    • H10K39/10—Organic photovoltaic [PV] modules; Arrays of single organic PV cells
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/30—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising bulk heterojunctions, e.g. interpenetrating networks of donor and acceptor material domains
    • H10K30/353—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising bulk heterojunctions, e.g. interpenetrating networks of donor and acceptor material domains comprising blocking layers, e.g. exciton blocking layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/17—Passive-matrix OLED displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/86—Series electrical configurations of multiple OLEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/20—Carbon compounds, e.g. carbon nanotubes or fullerenes
    • H10K85/211—Fullerenes, e.g. C60

Definitions

  • the present invention relates to an optical semiconductor device using a photoelectric conversion element such as organic electroluminescence.
  • organic EL organic electroluminescence
  • LED lighting needs to diffuse light in some way because the light emitting elements emit light like dots.
  • the organic EL illumination emits light from the panel itself, there is an advantage that a wide and uniform light can be obtained.
  • the panel is very thin, and it is possible to illuminate the wall surface of the room itself by attaching the panel to a wall or ceiling, etc. Also, it can be attached to a curved surface by using a plastic substrate panel it can.
  • white light is obtained by blue light of the light emitting element itself and yellow light obtained by the blue light hitting the phosphor.
  • white light can be obtained by stacking or juxtaposing, for example, red, green, and blue light emitting layers. This makes it possible to obtain light that is natural and soft and gentle to the eyes and that does not contain ultraviolet rays. It is also possible to manufacture panels having different color temperatures by changing the layer thickness of each color.
  • Patent Document 1 discloses an illumination system in which an organic EL element formed on a flexible substrate can be stored in a supply roll and a take-up roll. By winding the flexible substrate on a take-up roll, the positive electrode and the negative electrode formed on the front side of the flexible substrate are short-circuited by the striped electrode formed on the back side of the flexible substrate and wound on the take-up roll. It is described that the taken organic EL element does not emit light.
  • the present invention has been made in view of the above points, and an object thereof is to provide an optical semiconductor device capable of simplifying the replacement operation of the photoelectric conversion element with a relatively simple configuration.
  • the optical semiconductor device of the present invention includes a flexible substrate having a plurality of photoelectric conversion elements on the surface and element electrodes connected to each of the plurality of photoelectric conversion elements, and the flexible substrate along an arrangement direction of the plurality of photoelectric conversion elements.
  • the substrate guide has a conductive portion that contacts the element electrode at the use position.
  • FIG.1 (a) is a perspective view which shows the structure of the illuminating device based on the Example of this invention.
  • FIG. 1B is a cross-sectional view taken along line 1b-1b in FIG. It is a perspective view which shows the organic EL element formed on the flexible substrate which concerns on the Example of this invention. It is sectional drawing which shows the structure of the organic EL element which concerns on the Example of this invention.
  • 4A to 4C are plan views showing variations in the arrangement of the device electrodes according to the embodiment of the present invention. It is a block diagram which shows the structure of the control part which concerns on the Example of this invention.
  • Fig.6 (a) is a top view which shows the partial structure of the illuminating device based on the Example of this invention.
  • FIG. 6B is a block diagram illustrating the configuration of the control unit according to the embodiment of the present invention.
  • Fig.6 (a) is a top view which shows the partial structure of the illuminating device based on the Example of this invention.
  • FIG. 6B is a block diagram illustrating the configuration of the control unit according to the embodiment of the present invention.
  • Fig.6 (a) is a top view which shows the partial structure of the illuminating device based on the Example of this invention.
  • FIG. 6B is a diagram showing a pattern of the on-substrate separation electrode according to the embodiment of the present invention.
  • the top view which shows the partial structure of the illuminating device which concerns on the Example of this invention.
  • FIG. 10A is a perspective view showing the configuration of the illumination device according to the embodiment of the present invention.
  • FIG. 10B is a cross-sectional view taken along line 10b-10b in FIG.
  • FIG.10 (c) is a top view which shows the structure of the guide which concerns on the Example of this invention.
  • It is a block diagram which shows the structure of the control part which concerns on the Example of this invention.
  • It is a top view which shows the structure of the display apparatus which concerns on the Example of this invention.
  • It is a block diagram which shows the structure of the control part which concerns on the Example of this invention.
  • It is a perspective view which shows the structure of the solar power generation device which concerns on the Example of this invention.
  • It is sectional drawing which shows the structure of the photovoltaic element which concerns on the Example of this invention.
  • It is a block diagram which shows the structure of the control part which concerns on the Example of this invention.
  • the optical semiconductor device of the present invention has a flexible substrate having a plurality of photoelectric conversion elements and element electrodes connected to each of the plurality of photoelectric conversion elements on the surface, and the flexible substrate moves along the arrangement direction of the plurality of photoelectric conversion elements And positioning means for positioning the photoelectric conversion element at the use position, and a substrate guide on which the flexible substrate is slidably contacted to guide the movement of the flexible substrate.
  • the substrate guide has a conductive portion that contacts the element electrode at the use position.
  • the movement and positioning of the flexible substrate are automated, and the replacement work of the photoelectric conversion element can be simplified.
  • the substrate guide since the substrate guide has a conductive portion that contacts the element electrode at the use position, it has not only a guide function for guiding the movement of the flexible substrate but also a power transmission function for transferring power to and from the photoelectric conversion element. May also have.
  • the substrate guide since the substrate guide has a plurality of functions, the configuration of the apparatus can be simplified.
  • FIG. 1A is a perspective view showing a configuration of a lighting device 1 as an optical semiconductor device according to an embodiment of the present invention
  • FIG. 1B is a cross section taken along line 1b-1b in FIG.
  • FIG. 2 is a perspective view showing a plurality of organic EL elements 20 formed on the flexible substrate 10 constituting the illumination device 1 according to the embodiment of the present invention.
  • the flexible substrate 10 is made of a plastic material having good flexibility such as polycarbonate or polyethylene terephthalate (PET).
  • a plurality of organic EL elements 20, which are a kind of photoelectric conversion elements, are arranged on the flexible substrate 10 at regular intervals along the longitudinal direction of the flexible substrate 10.
  • Element electrodes 32 and 34 for supplying driving power to the organic EL element 20 are formed on both sides of each of the organic EL elements 20.
  • one or more functional films such as a moisture-proof film or a planarizing film made of an organic material or an inorganic material may be formed on the flexible substrate 10.
  • Rotating shafts 12a and 14a are connected to both ends in the longitudinal direction of the flexible substrate 10, and the supply roll 12 and the collecting roll 14 are formed by winding the flexible substrate 10 around the rotating shafts 12a and 14a.
  • the supply roll 12 is a storage unit for storing unused organic EL elements
  • the recovery roll 14 is a storage unit for storing used organic EL elements that have failed or deteriorated, for example.
  • the rotating shafts 12a and 14a are connected to motors 52 and 54 through gears or belts, respectively, and driving the motors 52 and 54 causes the rotating shafts 12a and 14a to rotate to supply unused organic EL elements.
  • the used organic EL elements are sent out from the roll 12 and collected in the collection roll 14. That is, the flexible substrate 10 moves from the supply roll 12 side to the collection roll 14 side along the arrangement direction of the organic EL elements 20.
  • the rotating shafts 12a and 14a are directed in a direction orthogonal to the moving direction of the flexible substrate 10.
  • the frame 70 accommodates each component of the illumination device 1 such as the supply roll 12, the collection roll 14, and substrate guides 42 and 44 described later. For this reason, each of these components is not visually recognized from the outside.
  • the frame 70 has a light extraction opening 72 that is approximately equal to or slightly smaller than the size of the organic EL element 20. The light emitted from the organic EL element 20 can be extracted from the light extraction opening 72 to the outside.
  • the light extraction opening 72 may be constituted by, for example, a partially formed light transmissive member. In this case, the surface of the light extraction opening 72 becomes the light extraction surface of the illumination device 1.
  • unused organic EL elements 20 accumulated in the supply roll 14 are sequentially formed at positions where the light extraction openings 72 are formed (hereinafter referred to as “light extraction openings 72”). (Referred to as a use position).
  • Each of the plurality of organic EL elements 20 formed on the flexible substrate 10 exhibits a function as an illumination light source at a use position.
  • the frame 70 is omitted in FIG.
  • the pair of substrate guides 42 and 44 hold the flexible substrate 10 delivered from the supply roll 12 flat at the use position so that the light extraction surface of the lighting device 1 and the flexible substrate 10 are parallel to each other.
  • the guide is applied and driving power is applied to the organic EL element 20.
  • the substrate guides 42 and 44 are made of, for example, a bar-shaped organic EL element 20, and are arranged between the supply roll 12 and the collection roll 14 so as to contact the surface of the flexible substrate 10. Further, the substrate guides 42 and 44 are arranged so that the longitudinal direction thereof is orthogonal to the moving direction of the flexible substrate 10 and parallel to the light extraction surface.
  • the substrate guides 42 and 44 are arranged so as to be parallel to each other at a predetermined interval so as to come into contact with the element electrodes 32 and 34 of the organic EL element 20 when the organic EL element 20 is positioned at the use position.
  • the substrate guides 42 and 44 are disposed outside the light extraction opening 72, and the supply roll 12 and the collection roll 14 are disposed outside the substrate guides 42 and 44 and behind the light projection direction.
  • the flexible substrate 10 slides on the substrate guides 42 and 44.
  • the cross-sectional shape of the portion in contact with the flexible substrate 10 is preferably an arc shape so as not to hinder the movement of the flexible substrate 10.
  • the radius of the arc is such that the flexible substrate 10, the organic EL element 20, and the element electrodes 32 and 34 are not damaged when the flexible substrate 10 is bent along the substrate guides 42 and 44. It needs to be large enough.
  • the shape of the substrate guides 42 and 44 may be a columnar shape or a cylindrical shape, or may be a prismatic shape with a curved surface in contact with the flexible substrate 10.
  • the lengths of the substrate guides 42 and 44 are preferably longer than the width of the flexible substrate 10, but a plurality of rod-like members shorter than the width of the flexible substrate 10 may be arranged at intervals.
  • the organic EL element 20 positioned at the use position can be obtained even when the roll diameter changes with the change in the amount of winding of the flexible substrate 10 in the supply roll 12 and the collection roll 14.
  • the state parallel to the light extraction surface is maintained.
  • auxiliary guides 402 and 404 may be added to sandwich the flexible substrate 10 from both sides.
  • the substrate guides 42 and 44 are connected to the control unit 60 via wirings 202 and 204, respectively.
  • the control unit 60 includes a drive power generation circuit 61 that generates drive power for driving the organic EL element 20, and the generated drive power is transmitted via wirings 202 and 204.
  • the substrate guides 42 and 44 are supplied.
  • the material of the substrate guides 42 and 44 is not particularly limited. However, when the substrate guides 42 and 44 are made of an insulator such as plastic or glass, the substrate guides 42 and 44 are supplied with the drive supplied from the drive power generation unit 61. On-guide power supply electrodes 42a and 44a for outputting electric power are provided.
  • the on-guide power supply electrodes 42a and 44a are formed by, for example, arranging a thin metal plate or wire on the guide surface, or depositing a conductive material such as metal or conductive oxide on the guide surface by sputtering, vapor deposition, plating, or the like. Can be formed.
  • the organic EL element 20 is positioned at the use position, the element electrodes 32 and 34 of the organic EL element and the on-guide power supply electrodes 42a and 44a come into contact with each other, so that driving power is supplied to the organic EL element 20. Is called.
  • the flexible substrate 10 is given a constant tension between the supply roll 12 and the collection roll 14, and the substrate guides 42 and 44 are brought into contact with the flexible substrate 10 with a constant pressure.
  • the guide body can be made of a conductive material such as aluminum or copper. In this case, since the guide body functions as an electrode, it is not necessary to separately provide a power supply electrode on the guide.
  • FIG. 3 is a cross-sectional view illustrating the structure of the organic EL element 20 as an example.
  • the organic EL element 20 is a so-called bottom emission type light emitting element configured by laminating an anode 21, an organic semiconductor layer 28, and a cathode 26 in this order on the flexible substrate 10.
  • the anode 21 is formed, for example, by depositing a conductive oxide such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) of about 100 nm on the flexible substrate 10 by sputtering and then patterning by etching. .
  • the anode 21 is patterned so as to be connected to the device electrode 34.
  • the material of the anode 21 may be a metal such as Al or an alloy such as Mg—Ag.
  • As a film forming method it is possible to use a vapor deposition method or a plating method in addition to sputtering.
  • a patterning method in addition to etching, a lift-off method, a mask vapor deposition method, or the like can be used.
  • the organic semiconductor layer 28 is configured by stacking, for example, a hole injection layer 22, a hole transport layer 23, a light emitting layer 24, and an electron injection layer 25 in this order.
  • the hole injection layer 22 is made of, for example, copper phthalocyanine (CuPc) having a thickness of about 10 nm
  • the hole transport layer 23 is made of ⁇ -NPD (Bis [N- (1-naphthyl) -N-pheny] benzidine, for example, having a thickness of about 50 nm).
  • the light emitting layer 24 is made of, for example, Alq 3 (tris- (8-hydroxyquinoline) aluminum) having a thickness of about 50 nm
  • the electron injection layer 25 is made of, for example, lithium fluoride (LiF) having a thickness of about 1 nm. Is done.
  • Each of the layers constituting the organic semiconductor layer 28 can be formed by, for example, a mask vapor deposition method.
  • the cathode 26 is formed, for example, by depositing Al of about 100 nm by a mask vapor deposition method.
  • the cathode 26 is patterned so as to be connected to the device electrode 32.
  • the material of the cathode 26 may be an alloy such as Mg—Ag, or may be a conductive oxide such as ITO or IZO.
  • a sealing film made of an organic material or an inorganic material may be formed so as to cover the entire surface of the organic EL element 20.
  • the device electrodes 32 and 34 are connected to the cathode 26 and the anode 21 of the organic EL device 20, respectively.
  • the device electrodes 32 and 34 may be made of the same material as the anode 21 or the cathode 26 or may be made of a different material.
  • Examples of the material for the device electrodes 32 and 34 include metals such as Al, Cu, Au, and Ag, alloys such as Mg—Ag and Ag—Pd—Cu, conductive oxides such as ITO and IZO, and PEDOT (poly (3 , 4-ethylenedioxyphen))), and resins and rubbers mixed with conductive particles such as Ag and carbon black.
  • the shape of the device electrodes 32 and 34 is not particularly limited as long as it has a sufficient contact area so that good contact with the substrate guides 42 and 44 can be obtained.
  • FIG. 4 (a) to 4 (c) show variations in the arrangement of the device electrodes 32 and 34.
  • FIG. 4A the device electrodes 32 and 34 may be disposed on both sides of the organic EL device 20. Further, as shown in FIG. 4B, the device electrodes 32 and 34 may be arranged along one side of the organic EL device 20. In this case, it is necessary to arrange the on-guide power supply electrode so as to correspond to the arrangement of the device electrodes 32 and 34. That is, the on-guide power supply electrodes 42a and 44a are provided on one of the substrate guides 42 or 44, and the other guide need not be provided with the on-guide power supply electrodes. Further, as shown in FIG.
  • a cathode-side element electrode 32 belonging to one organic EL element and an anode-side element electrode 34 belonging to another organic EL element adjacent to the one organic EL element are provided. You may connect. In this case, all the organic EL elements 20 on the flexible substrate 10 are connected in series. However, since power is supplied to each organic EL element via the substrate guides 42 and 44, there is a problem in operation. There is nothing.
  • FIG. 5 is a block diagram showing the configuration of the control unit 60.
  • the control unit 60 generates drive power for driving the organic EL element 20, performs position detection of the organic EL element 20, and performs drive control of the motors 52 and 54 based on the position detection result.
  • the control unit 60 includes a drive power generation circuit 61, a current sensor 62, a position detection circuit 63, and a motor drive circuit 64.
  • the driving power generation circuit 61 generates driving power based on an illumination ON / OFF command supplied from the outside.
  • the generated drive power is output from the on-guide power supply electrodes 42a and 44a via the wirings 202 and 204.
  • the current sensor 62 generates a current detection signal corresponding to the magnitude of the drive current supplied to the organic EL element 20 via the wiring 202, and supplies this to the position detection circuit 63.
  • the position detection circuit 63 detects that the current value indicated by the current detection signal is larger than a predetermined value, the position detection circuit 63 generates a position detection signal indicating that the organic EL element 20 has arrived at the use position. To supply.
  • the motor drive circuit 64 drives the motors 52 and 54 based on the supply / recovery command of the flexible substrate 10 supplied from outside, while the motors 52 and 54 operate based on the position detection signal supplied from the position detection circuit 63.
  • a motor drive signal is generated to stop driving and is supplied to the motors 52 and 54.
  • the motors 52 and 54 are connected to the rotation shafts 12a and 14a of the supply roll 12 and the collection roll 14 via gears or belts, respectively, and rotate the rotation shafts 12a and 14a.
  • the motors 52 and 54 are driven according to the motor drive signal supplied from the motor drive circuit 64, the flexible substrate 10 is sent out from the supply roll 12 and wound around the collection roll 14.
  • the motors 52 and 54 can be constituted by a DC motor, an AC motor, a stepping motor, or the like, but the type thereof is not particularly limited as long as it has a function of rotationally driving the rotating shafts 12a and 14a. It is also possible to supply and collect the flexible substrate 10 by connecting a motor only to the rotating shaft 14 a of the collecting roll 14.
  • the replacement operation of the organic EL element 20 in the lighting device 1 according to the present embodiment will be described below.
  • a defect such as deterioration or failure occurs in the organic EL element 20
  • a user's manual instruction to supply / collect the flexible substrate 10 is issued to the motor drive circuit 64.
  • the motor drive circuit 64 Upon receiving this, the motor drive circuit 64 generates a motor drive signal to operate the motors 52 and 54.
  • the motors 52 and 54 rotate the rotary shafts 12a and 14a in predetermined directions, respectively, according to the motor drive signal.
  • the flexible substrate 10 moves from the supply roll 12 side to the collection roll 14 side while contacting the substrate guides 42 and 44. That is, unused organic EL elements are sent from the supply roll 12 toward the light extraction opening 72 (use position), and the used organic EL elements are collected by the collection roll 14.
  • the element electrodes 32 and 34 and the on-guide power supply electrodes 42a and 44a are not in contact with each other. Thus, no drive power is supplied.
  • the element electrodes 32 and 34 and the guide power supply electrodes 42a and 44a come into contact with each other, and the drive power generated in the drive power generation circuit 61 is generated. Is supplied to the organic EL element 20 through the substrate guides 42 and 44. Along with this, a drive current flows through the wirings 202 and 204.
  • the current sensor 62 generates a current detection signal having a signal level corresponding to the drive current and supplies the current detection signal to the position detection circuit 63.
  • the position detection circuit 63 compares the current value indicated in the current detection signal with a predetermined threshold and detects that the detected current value is higher than the predetermined threshold, the organic EL element 20 A position detection signal indicating that the position has reached the use position is generated and supplied to the motor drive circuit 64.
  • the motor drive circuit 64 When the motor drive circuit 64 receives the position detection signal, the motor drive circuit 64 generates a motor drive signal to stop the rotation of the motors 52 and 54, and supplies the motor drive signal to the motors 52 and 54.
  • the motors 52 and 54 stop the rotation of the rotary shafts 12a and 14a according to the motor drive signal. Thereby, the movement of the flexible substrate 10 is stopped, and the unused organic EL element sent from the supply roll 12 is positioned at the position where the light extraction opening 72 is formed, that is, the use position, and the replacement operation of the organic EL element is performed. finish.
  • the device electrodes 32 and 34 are in contact with the on-guide power supply electrodes 42a and 44a, respectively, and the drive power generated in the drive power generation circuit 61 is supplied to the organic EL device via the substrate guides 42 and 44. Then, the organic EL element emits light. The light emitted from the organic EL element is extracted from the light extraction opening 72.
  • the flexible substrate 10 is moved along the arrangement direction of the plurality of organic EL elements 20, and the organic EL element 20 is positioned at the use position.
  • the positioning means includes a position detection circuit 63, a motor drive circuit 64, motors 52 and 54, rotating shafts 12a and 14a, etc., positioning of unused organic EL elements accumulated in the supply roll 12 to the use position
  • the substrate guides 42 and 44 hold the flexible substrate 10 flat at the use position regardless of fluctuations in the diameters of the supply roll 12 and the collection roll 14, and light extraction from the lighting device is performed. Since the flexible substrate 10 is guided so that the surface and the flexible substrate are parallel to each other, it is possible to prevent a reduction in the efficiency of the lighting device.
  • substrate guides 42 and 44 are provided with the function as a transmission path
  • the position detection of an organic EL element also bears the function.
  • the illumination device only the organic EL element positioned at the use position emits light, so the organic EL element accumulated in the supply roll 12 is stored in a non-light emitting state. Is possible. Moreover, since it is not necessary to form an electrode on both surfaces of the flexible substrate 10, manufacture is easy and manufacturing cost can be suppressed.
  • FIG. 6A is a plan view showing a partial configuration of the illumination apparatus according to the second embodiment of the present invention.
  • an on-substrate separation electrode 36 separated from the element electrodes 32 and 34 is provided on the flexible substrate 10, and a guide is provided on the substrate guide 42.
  • the guide upper separation electrode 46 separated from the upper power supply electrode 42a is provided.
  • Other components are the same as those in the first embodiment. Hereinafter, parts different from the first embodiment will be described in detail.
  • an on-substrate separation electrode 36 is provided in association with each organic EL element 20.
  • the on-substrate separation electrode 36 is disposed, for example, in the vicinity of the element electrode 32 and is electrically separated from the element electrode 32. It is sufficient that at least one on-substrate separation electrode 36 is provided in association with each organic EL element 20 and may be formed in the vicinity of the element electrode 34.
  • the shape and size of the on-substrate separation electrode 36 are not particularly limited, but can be formed smaller than the device electrodes 32 and 34.
  • a piece of on-guide separation electrode 46 is provided on the substrate guide 42 at a position corresponding to the on-substrate separation electrode 36.
  • the on-guide separation electrode 46 is disposed, for example, in the vicinity of the on-guide power supply electrode 42a and is electrically separated from the on-guide power supply electrode 42a.
  • the on-guide separation electrode 46 may be formed only on one of the substrate guides 42 and 44 in accordance with the arrangement of the on-substrate separation electrode 36.
  • the on-guide power supply electrode 42a When the organic EL element 20 reaches the use position, the on-guide power supply electrode 42a is in contact with both the element electrode 32 and the on-substrate separation electrode 36, and the on-guide separation electrode 46 is in contact with only the on-substrate separation electrode 36.
  • the respective electrodes 36, 42a, 46 are arranged on each other. With such an electrode arrangement, when the organic EL element 20 arrives at the use position, the on-guide separation electrode 46 is electrically connected to the on-guide power supply electrode 42 a via the on-substrate separation electrode 36. As a result, the drive voltage output from the guide power supply electrode 42 a is applied to the guide upper separation electrode 46.
  • FIG. 6B is a block diagram showing a configuration of a control unit 60b for detecting the position of the organic EL element 20 using the on-substrate separation electrode 36 and the on-guide separation electrode 46 of the embodiment shown in FIG. It is.
  • the control unit 60b includes a voltage sensor 65 instead of the current sensor 62 in the first embodiment.
  • the voltage sensor 65 is connected to the on-guide separation electrode 46, generates a voltage detection signal having a signal level corresponding to the magnitude of the voltage generated on the on-guide separation electrode 46, and supplies this to the position detection circuit 63.
  • the position detection circuit 63 outputs a position detection signal indicating that the organic EL element 20 has arrived at the use position when it is detected that the voltage value indicated by the voltage detection signal supplied from the voltage sensor 65 is greater than a predetermined value. Generate. That is, the position detection circuit 63 detects the position of the organic EL element 20 by detecting that the drive voltage is applied to the on-guide separation electrode 46 due to the contact between the on-guide separation electrode 46 and the on-substrate separation electrode 36. .
  • FIG. 7A is a plan view showing another embodiment of the on-guide separation electrode 46.
  • the on-guide separation electrode 46 may be composed of two segments that are electrically insulated from each other.
  • the two segments are arranged so as to contact the on-substrate separation electrode 36, and the on-guide power supply electrode 42a is arranged not to contact the on-substrate separation electrode 36. Is done.
  • the two segments of the on-guide separation electrode 46 are electrically connected (short-circuited) to each other via the on-substrate separation electrode 36. Is done.
  • FIG. 7B is a block diagram showing a configuration of a control unit 60c for detecting the position of the organic EL element 20 using the on-substrate separation electrode 36 and the on-guide separation electrode 46 of the embodiment shown in FIG. It is.
  • the control unit 60c has a resistance sensor 66 instead of the voltage sensor 65 shown in FIG.
  • the resistance sensor 66 is connected to the on-guide separation electrode 46, generates a resistance detection signal having a signal level corresponding to the resistance between the segments of the on-guide separation electrode 46, and supplies this to the position detection circuit 63. .
  • the position detection circuit 63 generates a position detection signal indicating that the organic EL element 20 has arrived at the use position when it is detected that the resistance value indicated by the resistance detection signal supplied from the resistance sensor 66 is lower than a predetermined value. Generate. That is, the position detection circuit 63 detects the position of the organic EL element 20 by detecting that the segment of the on-guide separation electrode 46 is short-circuited with the contact between the on-guide separation electrode 46 and the on-substrate separation electrode 36. .
  • the position of the organic EL element 20 is detected based on the potential state of the on-guide separation electrode 46 generated by the contact between the on-substrate separation electrode 36 and the on-guide separation electrode 46.
  • the EL element 20 is positioned. According to the illumination device according to the second embodiment, it is possible to individually perform power supply to the organic EL element and position detection of the organic EL element.
  • FIG. 8A is a plan view showing a partial configuration of the lighting apparatus according to Embodiment 3 of the present invention.
  • the illumination device according to the present embodiment is provided with the on-substrate separation electrode 36 and the on-guide separation electrode 46 on the flexible substrate 10 and the substrate guides 42 and 44, respectively, similarly to the above-described illumination device according to the second embodiment. .
  • the lighting device according to the present embodiment performs individual identification of the plurality of organic EL elements 20 provided on the flexible substrate 10 using the on-substrate separation electrode 36 and the on-guide separation electrode 46.
  • parts different from the first and second embodiments will be described in detail.
  • an on-substrate separation electrode 36 is provided in association with each organic EL element 20.
  • the on-substrate separation electrode 36 is disposed in the vicinity of the device electrode 32 and is electrically insulated from the device electrode 32.
  • the on-substrate separation electrode 36 has a different pattern for each accompanying organic EL element.
  • FIG. 8B shows an example of the pattern of the on-substrate separation electrode 36 associated with each of the organic EL elements 20.
  • the on-substrate separation electrode 36 has, for example, a comb-shaped pattern in which the number of comb teeth is different for each accompanying organic EL element. In the example of FIG. 8B, seven different patterns are illustrated. With these seven types of patterns, the seven organic EL elements formed on the flexible substrate 10 can be identified.
  • the on-guide separation electrode 46 is constituted by three segments corresponding to the comb-teeth pattern of the on-substrate separation electrode 36.
  • the organic EL element 20 arrives at the use position, the comb tooth located on the leftmost side of the on-substrate separation electrode 36 in contact with the on-guide power supply electrode 42a, while the other comb teeth correspond to the on-guide separation electrode 46. Touch the segment you want to touch.
  • the on-guide separation electrode 46 is electrically connected to the on-guide power supply electrode 42 a via the on-substrate separation electrode 36.
  • a drive voltage is applied to each segment of the on-guide separation electrode 46 in a manner different from each other for each accompanying organic EL element according to the comb-teeth pattern of the on-substrate separation electrode 36.
  • the voltage sensor 65 (see FIG. 6B) outputs a voltage detection signal having a signal level corresponding to the magnitude of the voltage generated in the on-guide separation electrode 46 for each segment according to the pattern of the on-substrate separation electrode 36. .
  • the position detection circuit 63 detects that the voltage value indicated by the voltage detection signal supplied from the voltage sensor 65 exceeds a predetermined value, the position detection circuit 63 generates a position detection signal indicating that the organic EL element 20 has arrived at the use position. . Further, the position detection circuit 63 detects in which segment of the on-guide separation electrode 46 the voltage is generated, specifies the organic EL element 20, and outputs the result as an identification signal.
  • the identification signal can be used, for example, to display the remaining number of unused organic EL elements accumulated in the supply roll 12.
  • a remaining number display unit (not shown) connected to the position detection circuit 63 is provided, and the remaining number of the EL elements is displayed in a display form such as a numerical value or the number of lamps lit.
  • FIG. 9 is a plan view showing another configuration for performing individual identification of the organic EL element 20.
  • resistance elements 37 having different resistance values are provided between the segments of the on-substrate separation electrode 36 for each accompanying organic EL element.
  • the on-guide separation electrode 46 includes two segments that are insulated from each other and are arranged so as to come into contact with each segment of the on-substrate separation electrode 36 when the organic EL element 20 arrives at the use position.
  • the resistance sensor 66 (see FIG. 7B) generates a resistance detection signal having a signal level corresponding to the magnitude of the resistance between the segments of the on-guide separation electrode 46, and supplies this to the position detection circuit 63.
  • the position detection circuit 63 generates a position detection signal indicating that the organic EL element 20 has arrived at the use position when it is detected that the resistance value indicated by the resistance detection signal supplied from the resistance sensor 66 is lower than a predetermined value. Generate. Furthermore, the position detection circuit 63 performs individual identification of the organic EL element 20 based on the resistance value indicated by the resistance detection signal, and generates an identification signal corresponding to the identification result.
  • the position detection and the individual identification of the organic EL element 20 can be simultaneously performed by using the pattern of the on-substrate separation electrode 36 or the resistance element as the identification mark of the organic EL element.
  • the convenience of the lighting device can be further enhanced.
  • FIG. 10A is a perspective view showing the configuration of the illumination device 4 according to Embodiment 4 of the present invention
  • FIG. 10B is a cross-sectional view taken along the line 10b-10b in FIG. 10A
  • FIG.10 (c) is a top view which shows the contact surface with the organic EL element 20 of the board
  • the illumination device 4 according to the present embodiment is different from the above embodiments in the shape of the substrate guide 48. Other components are the same as those in the first embodiment.
  • the substrate guide 48 is composed of a planar member having a flat surface that comes into contact with the entire surface of the organic EL element 20 and the element electrodes 32 and 34 when the organic EL element 20 is in the use position.
  • the substrate guide 48 is disposed so that the surface in contact with the organic EL element 20 is parallel to the light extraction surface of the illumination device.
  • the flexible substrate 10 slides on the surface of the substrate guide 48 according to the rotation of the supply roll 12 and the collection roll 14.
  • the substrate guide 48 preferably has an arcuate cross-sectional shape so that the movement of the flexible substrate 10 is not hindered. However, the radius of the arc is such that the flexible substrate 10, the organic EL element 20, and the device electrodes 32 and 34 are not damaged when the flexible substrate 10 is bent along the end surface of the substrate guide 48. It needs to be large enough.
  • the substrate guide 48 is preferably made of a material having high thermal conductivity, for example, a metal such as aluminum or copper.
  • the substrate guide 48 may be made of an insulator.
  • On the surface of the substrate guide 48 on-guide power supply electrodes 42a and 44b are provided.
  • the on-guide power supply electrodes 42a and 44a are arranged so as to contact the element electrodes 32 and 34 when the organic EL element 20 arrives at the use position.
  • the substrate guide 48 is made of a conductive material, it is necessary to provide an insulating sheet 49 made of an insulating resin or the like immediately below the upper guide electrodes 42a and 44a and insulate the electrodes 42a to 44a. .
  • the substrate guide 48 holds the flexible substrate 10 flat at the use position so that the light extraction surface and the flexible substrate 10 are parallel to each other in the same manner as the pair of substrate guides 42 and 44 made of the rod-shaped members shown in the above embodiments.
  • the flexible substrate 10 sequentially fed from the supply roll 12 is guided and driving power is applied to the organic EL element 20.
  • the substrate guide 48 since the substrate guide 48 has a flat surface in contact with the entire surface of the organic EL element 20, it also functions as a heat sink that efficiently releases the heat generated from the organic EL element 20 to the outside.
  • the on-guide separation electrode 46 shown in the second and third embodiments can be provided on the substrate guide 48.
  • FIG. 11 is a block diagram illustrating a configuration of a control unit 60d that configures the illumination device according to the fifth embodiment of the present invention.
  • the lighting apparatus according to the present embodiment has a function of detecting the deterioration of the organic EL element 20 and automatically replacing the organic EL element 20 when the deterioration is detected.
  • the control unit 60d further includes a deterioration detection circuit 67 in addition to the configuration of the control unit 60 in the first embodiment. Other components are the same as those in the first embodiment.
  • the deterioration detection circuit 67 is electrically connected to the on-guide power supply electrodes 42a and 44a, and monitors the voltage between the anode and the cathode of the organic EL element 20 during driving.
  • the organic EL element 20 has a characteristic that, as the deterioration progresses, the emission luminance decreases and the forward voltage increases.
  • the deterioration detection circuit 67 detects deterioration of the organic EL element 20 using this characteristic.
  • the deterioration detection circuit 67 detects that the forward voltage between the anode and the cathode of the organic EL element 20 observed through the substrate guides 42 and 44 is higher than a predetermined threshold value, the deterioration detection circuit 67 A supply / recovery command is generated and supplied to the motor drive circuit 64.
  • the motor drive circuit 64 When receiving the supply / collection command, the motor drive circuit 64 generates a motor drive signal to rotate the motors 52 and 54.
  • the motors 52 and 54 rotate the rotary shafts 12a and 14a in predetermined directions, respectively, according to the motor drive signal.
  • an unused organic EL element is sent out from the supply roll 12, and the used organic EL element is collected in the collection roll 14, and the replacement operation of the organic EL element is started.
  • the subsequent process of the exchange operation is the same as in the first embodiment.
  • the replacement operation of the organic EL element is automatically started when the deterioration of the organic EL element progresses. Therefore, the convenience can be further improved.
  • the deterioration detection of the organic EL element 20 can also be realized by monitoring the light emission luminance of the organic EL element 20.
  • a light receiving element such as a photodiode is disposed at a position where light emitted from the organic EL element 20 can be received.
  • the light receiving element generates a photocurrent according to the intensity of the received light.
  • the deterioration detection circuit 67 monitors the photocurrent generated by the light receiving element, and generates a supply / recovery command for the flexible substrate 10 when it is detected that the photocurrent is smaller than a predetermined threshold value.
  • FIG. 12 is a plan view showing the configuration of the display device 6 according to Example 6 of the present invention.
  • an organic EL element is used as an illumination light source.
  • a plurality of organic EL elements are used as display pixels of a display device.
  • a display unit 80 for displaying arbitrary characters, images, videos, and the like is formed on the flexible substrate 10.
  • the display unit 80 includes row electrodes 32a to 32e arranged in the row direction, column electrodes 34a to 34e arranged in the column direction so as to intersect the row electrodes 32a to 32e, row electrodes 32a to 32e, and column electrodes 34a.
  • the row electrodes 32 a to 32 e are connected to the cathode 26 of the organic EL element 20, and the column electrodes 34 a to 34 e are connected to the anode 21 of the organic EL element 20. That is, the row electrodes 32a to 32e and the column electrodes 34a to 34e correspond to the device electrodes 32 and 34 in the above embodiments.
  • Each of the organic EL elements 20 sandwiched between the row electrode and the column electrode functions as a display cell.
  • a plurality of display units 80 are formed on the flexible substrate 10, unused display units are stored in the supply roll 12, and display units that have deteriorated or failed are stored in the collection roll.
  • the substrate guides 42 and 44 are arranged so that their longitudinal directions are perpendicular to the moving direction of the flexible substrate 10 and parallel to the light extraction surface.
  • on-guide power supply electrodes 42a to 42e and 44a to 44e corresponding to the row electrodes 32a to 32e and the column electrodes 34a to 34e are formed on the substrate guides 42 and 44.
  • the electrodes are arranged so that the column electrodes 32a to 32e and the row electrodes 34a to 34e come into contact with the on-guide power supply electrodes 42a to 42e and 44a to 44e when the display unit 80 reaches the use position.
  • An on-substrate separation electrode 36 and an on-guide separation electrode 46 for positioning the display unit 80 at the use position are formed on the flexible substrate 10 and the substrate guide 42, respectively.
  • Each of the organic EL elements constituting the display unit 80 is driven by a so-called passive matrix method. That is, arbitrary characters, images, and videos are displayed by selectively causing the display cells to emit light through the row electrodes 32a to 32e and the column electrodes 34a to 34e.
  • FIG. 13 is a block diagram illustrating a configuration of the control unit 60e according to the present embodiment.
  • the display controller 91 When receiving a video signal given from the outside, the display controller 91 generates a control signal to display an image corresponding to the video signal in the display unit 80, and supplies this to the row driver 92 and the column driver 93.
  • the row driver 92 sequentially applies a predetermined voltage to the row electrodes 32a to 32e based on the control signal. This voltage application period is a selection period of the row electrodes 32a to 32e.
  • the column driver 93 selectively supplies driving power to the column electrodes 34a to 34e in synchronization with the selection period of the row electrodes 32a to 32e. Thereby, the display unit 80 displays the video corresponding to the input video signal.
  • the replacement operation of the display unit 80 can be the same as that in the second embodiment described above, for example. That is, the resistance sensor 66 monitors the resistance value between the segments of the upper guide separation electrode 46, and when the position detection circuit 63 detects that the monitored resistance value is lower than the predetermined value, the display unit 80 arrives at the use position. A position detection signal indicating that this has occurred is generated. Thereby, the position of the display unit 80 is detected, and the display unit 80 can be automatically replaced.
  • the effect similar to the effect of the illuminating device which concerns on the said Example 1 can be brought about also in a display apparatus.
  • FIG. 14 is a perspective view showing the configuration of the photovoltaic power generator 7 according to Embodiment 7 of the present invention.
  • an organic EL element which is a kind of photoelectric conversion element is caused to function as an illumination light source or a display pixel.
  • a photovoltaic element is used as a photoelectric conversion element, and this is made to function as a solar cell. That is, in the photovoltaic power generation apparatus 7 according to the present embodiment, a plurality of photovoltaic elements 100 that convert received light into electric power and output are arranged on the flexible substrate 10 in the longitudinal direction of the flexible substrate 10. Yes.
  • the basic configuration of the solar power generation device 7 is the same as that of the lighting device 1 according to the first embodiment except that the organic EL element is replaced with the photoelectric conversion element 100. That is, unused photovoltaic elements are accumulated in the supply roll 12, and used photovoltaic elements that have deteriorated or failed are accumulated in the collection roll 14.
  • the flexible substrate 10 is moved from the supply roll 12 side to the collection roll 14 side along the direction in which the photovoltaic elements 100 are arranged. It moves while contacting 44.
  • Each of the plurality of photovoltaic elements 100 formed on the flexible substrate 10 exhibits a function as a solar cell when they are positioned at the use positions.
  • an on-substrate separation electrode 36 and an on-guide separation electrode 46 for positioning the photovoltaic element 100 at the use position are formed.
  • FIG. 15 is a cross-sectional view illustrating the configuration of the photovoltaic element 100 according to the present embodiment.
  • the photovoltaic device 100 is configured by laminating an anode 101, an organic semiconductor layer 108, and a cathode 106 in this order on a flexible substrate 10.
  • the anode 101 is formed, for example, by forming a conductive oxide such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) having a thickness of about 100 nm on the flexible substrate 10 by sputtering, and then patterning by etching. Is done.
  • the anode 101 is patterned so as to be connected to the device electrode 34.
  • the material of the anode 101 may be composed of a metal such as Al or an alloy such as Mg—Ag.
  • As a film forming method it is possible to use a vapor deposition method or a plating method in addition to sputtering.
  • a patterning method in addition to etching, a lift-off method, a mask vapor deposition method, or the like can be used.
  • the organic semiconductor layer 108 is configured by stacking, for example, a hole extraction layer 102, a power generation layer 103, an electron extraction layer 104, and an exciton blocking layer 105 in this order.
  • the hole extraction layer 102 is made of, for example, copper phthalocyanine (CuPc) having a thickness of about 20 nm
  • the power generation layer 103 has a thickness of about 40 nm in which copper phthalocyanine (CuPc) and fullerene (C 60 ) are mixed at a molar ratio of 1: 1.
  • the electron extraction layer 104 is made of, for example, fullerene (C 60 ) having a thickness of about 30 nm
  • the exciton blocking layer 105 is made of, for example, BCP (2,9-Dimethyl-4,7- diphenyl-1,10-phenanthroline).
  • Each layer constituting the organic semiconductor layer 108 is formed by, for example, a mask vapor deposition method.
  • the material of each layer constituting the organic semiconductor layer 108 is not limited to the exemplified low molecular organic semiconductor such as CuPc, but may be a high molecular organic semiconductor such as P3HT (poly (3-hexyl thiophene)), fullerene, carbon nanotube, or the like.
  • P3HT poly (3-hexyl thiophene
  • fullerene carbon nanotube, or the like.
  • Well not particularly limited.
  • a coating method such as an ink jet method or a relief printing method may be used as a method for forming each layer
  • the cathode 106 is formed, for example, by depositing Al of about 100 nm by a mask vapor deposition method.
  • the cathode 106 is patterned so as to be connected to the device electrode 32.
  • the material of the cathode 106 may be made of a metal such as Al or an alloy such as Mg—Ag, or may be made of a conductive oxide such as ITO or IZO.
  • a sealing film made of an organic material or an inorganic material may be formed so as to cover the entire surface of the photovoltaic element 100.
  • the photovoltaic element 100 may be comprised from one cell, and may be divided
  • the organic semiconductor layer 108 is configured by the hole extraction layer 102, the power generation layer 103, the electron extraction layer 104, and the exciton blocking layer 105.
  • functional layers such as a planarization layer and an optical buffer layer are provided. May be inserted.
  • a so-called tandem structure in which the organic semiconductor layers 108 are repeatedly stacked may be employed. In this case, the stacked units may have different configurations and materials.
  • the organic semiconductor layer 108 generates DC power when receiving light.
  • the generated electric power is taken out from the device electrodes 32 and 34 and supplied to the control unit 60f via the substrate guides 42 and 44.
  • the substrate guides 42 and 44 are provided with on-guide power receiving electrodes 42c and 44c arranged so as to come into contact with the device electrodes 32 and 34 when the photovoltaic device 100 is positioned at the use position.
  • FIG. 16 is a block diagram illustrating a configuration of the control unit 60f according to the present embodiment.
  • the electric power generated in the photovoltaic element 100 is received by the on-guide power receiving electrodes 42 c and 44 c and supplied to the inverter 68 through the wirings 202 and 204.
  • the inverter 68 converts the DC power generated in the photovoltaic element 100 into AC power having a desired frequency and voltage and outputs the AC power to the output terminal 69.
  • a DC-DC converter that outputs a DC current generated in the photovoltaic element 100 by stepping up or down to an arbitrary voltage may be provided instead of the inverter 69 or together with the inverter 69.
  • the replacement operation of the photovoltaic element 100 can be performed in the same manner as in the second embodiment described above, for example. That is, the resistance sensor 66 monitors the resistance value between the segments of the on-guide separation electrode 46, and the position detection circuit 63 generates a position detection signal when detecting that the monitored resistance value is lower than a predetermined value. Thereby, the position of the photovoltaic element 100 is detected, and the photovoltaic element 100 can be automatically replaced.
  • the solar power generation device 7 according to the present embodiment is assumed to be installed outdoors, and is exposed to a severe environment as compared with a lighting device used mainly indoors. For this reason, it is considered that the possibility of deterioration and failure increases and the replacement frequency also increases. According to the photovoltaic power generation apparatus according to the present embodiment, it is possible to significantly reduce the labor for replacing the photovoltaic elements that function as solar cells. Thus, according to the structure which concerns on a present Example, the effect similar to the effect of the illuminating device which concerns on the said Example 1 can be brought also in a solar power generation device.

Abstract

L'invention porte sur un dispositif optique à semi-conducteurs, lequel dispositif comprend : un substrat souple qui a, sur une surface, de multiples éléments de conversion photoélectriques et de multiples électrodes élémentaires, qui sont respectivement connectées aux multiples éléments de conversion photoélectriques ; un moyen de positionnement pour placer au moins l'un des éléments de conversion photoélectriques dans la position d'utilisation par déplacement du substrat souple dans la direction de groupement des multiples éléments de conversion photoélectriques ; et des guides de substrat pour guider le mouvement du substrat souple par le fait de faire rester le substrat souple en contact d'une manière coulissante. Les guides de substrat ont des parties conductrices qui viennent en contact avec les électrodes élémentaires dans la position d'utilisation.
PCT/JP2011/052011 2011-02-01 2011-02-01 Dispositif optique à semi-conducteurs WO2012104992A1 (fr)

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