JP4276758B2 - Power generation device using spherical semiconductor element and light emitting device using spherical semiconductor element - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention is a power generation device that increases the amount of light received by a plurality of spherical semiconductor elements by reflected light to increase the photoelectric conversion efficiency, and the light generated by the plurality of spherical semiconductor elements is concentrated only on the surface side to emit light. The present invention relates to a light-emitting device that increases efficiency.
[0002]
[Prior art]
  Various solar cells using semiconductors that convert solar energy into electrical energy have become widespread. In this type of semiconductor solar cell, semiconductors such as silicon single crystal, silicon polycrystal, and amorphous Si are generally used, but the photoelectric conversion efficiency is low and the manufacturing process including wiring and assembly work is complicated. For this reason, there is a problem that it becomes expensive and cannot be downsized. Further, in this type of semiconductor solar cell, the semiconductor substrate is planar, and the light receiving surface and the pn junction formed inside thereof are also substantially planar, so that when the incident angle of light increases, the reflected light is reflected. There is a problem that the photoelectric conversion efficiency increases and the photoelectric conversion efficiency decreases.
[0003]
  Therefore, the inventor of the present application can be applied to various applications using a light-receiving element (photoelectric conversion element), a light-emitting element (electro-optical conversion element) and a spherical semiconductor element as a photocatalytic element in International Publication No. WO98 / 15983, We proposed a new semiconductor device that can be reduced in size, weight, power generation voltage, and cost. That is, as a photoelectric conversion type semiconductor device, a solar cell array in which solar cells having a diffusion layer, a pn junction, and a pair of electrodes are basically arranged in a line on the surface of a semiconductor spherical crystal is connected in series. A cylindrical solar cell device in which this solar cell array is housed in a light transmissive case is proposed, and a panel-shaped solar cell device in which the plurality of solar cell arrays are housed in a light transmissive case is provided. Proposed.
[0004]
  In any of these solar cell devices, the upper main surface and the lower main surface of the light-transmitting case have a geometrically symmetrical structure, so that sunlight can be received from either the front or back side, and the light is transmitted to the solar cells. Photoelectromotive force is generated by direct irradiation. In addition, these two main surfaces are formed with partially cylindrical curved surfaces so that light can be received at a wide angle, thereby improving the light receiving performance with respect to light whose incident direction varies like sunlight. Furthermore, as an electro-optic conversion type semiconductor device using light emitting diodes configured basically in the same manner as solar cells, light is emitted toward both the front and back sides by applying a voltage to a pair of electrodes of the light emitting diodes. A possible columnar or panel light emitting device was proposed.
[0005]
[Problems to be solved by the invention]
  In the columnar or panel photoelectric conversion semiconductor device proposed by the inventor of the present application in International Publication No. WO98 / 15983, the solar cell array is accommodated in the case in parallel in a plurality of rows, so that the surface of the case Among them, there is a problem that the conversion efficiency of the photovoltaic power is lowered because the photoelectric conversion invalid area that does not contribute to photoelectric conversion at all by the transmission of sunlight between the curved surfaces of the partial cylindrical surfaces provided with the solar cells is large. is there.
[0006]
  Further, in these photoelectric conversion type semiconductor devices, there is a problem that the amount of transmitted light that passes through the case without contributing to the photoelectric conversion increases, and the photoelectric conversion efficiency due to the transmitted light further decreases. In particular, in many cases, light incident from one side (for example, the front side) of the photoelectric conversion type semiconductor device is received, but the back side of the semiconductor device does not contribute to photoelectric conversion.
[0007]
  Further, in the electro-optic conversion type semiconductor device, the light generated by the light emitting diode is emitted simultaneously toward the front side and the back side of the semiconductor device. There is a problem that the light emitted to the back side of the substrate is wasted.
  An object of the present invention is to increase the amount of light received by the semiconductor element array of the photoelectric conversion type power generation device to increase the photoelectric conversion efficiency, and to emit light generated on the back surface side from the front side of the electroluminescence conversion type power generation device. Such as increasing luminous efficiency.
[0008]
[Means for Solving the Problems]
  The power generator using the spherical semiconductor element according to claim 1 is a semiconductor in which a plurality of spherical semiconductor elements each having a photovoltaic power generation part formed in a semiconductor spherical crystal and a pair of electrodes formed at both ends are connected in series. In a power generation device including an element array and a light-transmissive case member that accommodates the semiconductor element array,On the light incident side surface of the case member and on the back surface on the opposite side of the surface, a partially cylindrical surface projecting outward corresponding to the semiconductor element array is formed, respectively.Light that is provided in close contact with the back side of the case member and is incident from the front side of the case member and transmitted through the case member can be reflected toward the semiconductor element array.Made of scattering reflection type synthetic resinProvide a reflective memberThe reflective member has a partial cylindrical reflective surface that is in close contact with the partial cylindrical surface on the back surface of the case member.Is.
[0009]
  A semiconductor element array in which a plurality of spherical semiconductor elements each having a photovoltaic power generation unit are connected in series is housed in a light transmissive case member, and a reflective member is provided in close contact with the back side of the case member. The spherical semiconductor element not only generates a photovoltaic power by light directly irradiated to the semiconductor element array via the case member, but also reflects reflected light that is incident from the surface side and transmitted through the case member and reflected by the reflecting member. Light is received to generate photovoltaic power. That is, since the semiconductor element array can receive not only the direct light incident on the case member but also the reflected light, the amount of received light can be increased, the photovoltaic power generated by the spherical semiconductor element can be increased, and the photoelectric conversion efficiency can be greatly increased. .
[0010]
  A power generation apparatus using a spherical semiconductor element according to claim 2 is a semiconductor in which a plurality of spherical semiconductor elements each having a photovoltaic generation portion formed in a semiconductor spherical crystal and a pair of electrodes formed at both ends are connected in series. In a power generation device including a semiconductor element module in which element arrays are arranged in parallel in a plurality of columns, and a light-transmissive case member that accommodates the semiconductor element module,A plurality of outwardly projecting partial cylindrical surfaces corresponding to the plurality of rows of semiconductor element arrays are respectively formed on the light incident side surface of the case member and the back surface opposite to the surface.Light that is provided in close contact with the back side of the case member and is incident from the front side of the case member and transmitted through the case member can be reflected toward the semiconductor element array.Made of scattering reflection type synthetic resinProvide a reflective memberThe reflective member has a plurality of partial cylindrical reflective surfaces that are in close contact with the plurality of partial cylindrical surfaces on the back surface of the case member.Is.
[0011]
  In this case, the semiconductor element module operates in substantially the same manner as in the first aspect, but the semiconductor element module in which a plurality of semiconductor element arrays are arranged in parallel is housed in the light-transmitting case member, so that the semiconductor element module is incident on the case member. Since not only the direct light that is reflected but also the reflected light reflected by the reflecting member can be received, the amount of received light is increased, the photovoltaic power generated by the spherical semiconductor element is further increased, and the photoelectric conversion efficiency can be greatly increased.
[0012]
  here,in frontWhen the reflecting member is made of a synthetic resin plate-like reflector adhered to the back surface of the case member (claims dependent on claim 1 or 2)3), By using a plate-like reflector such as white scattering reflection type polycarbonate, the reflection efficiency can be ensured and the case member can be reinforced.
[0013]
  Claim4A light emitting device using a spherical semiconductor element includes a semiconductor element array in which a plurality of spherical semiconductor elements each having an electro-optic conversion portion formed in a semiconductor spherical crystal and a pair of electrodes formed at both ends are connected in series. In a light emitting device including a light transmissive case member that houses a semiconductor element array,On the light emitting side surface of the case member and on the back surface on the opposite side of the surface, a partially cylindrical surface projecting outward corresponding to the semiconductor element array is formed, respectively.Light that is provided in close contact with the back side of the case member and that is generated in the semiconductor element array and transmitted to the back side of the case member can be reflected to the front side of the case member.Made of scattering reflection type synthetic resinProvide a reflective memberThe reflective member has a partial cylindrical reflective surface that is in close contact with the partial cylindrical surface on the back surface of the case member.Is.
[0014]
  A semiconductor element array in which a plurality of spherical semiconductor elements each having an electro-optic conversion unit are connected in series is housed in a light-transmitting case member, and a reflective member is provided in close contact with the back side of the case member. Light generated in the semiconductor element array by applying a voltage to the electrodes is emitted to both the front side and the back side of the case member. At this time, the light transmitted to the back surface side of the case member is reflected to the front surface side by the reflecting member. That is, the light generated in the semiconductor element array is emitted to both the front and back sides of the case member, but the light on the back side is reflected by the reflecting member and emitted to the front side. Therefore, all the light generated in the semiconductor element array is emitted. It can be efficiently emitted to the surface side of the case member.
[0015]
  Claim5The light-emitting device using the spherical semiconductor element includes a plurality of semiconductor element arrays in which a plurality of spherical semiconductor elements each having an electro-optic conversion portion formed in a semiconductor spherical crystal and a pair of electrodes formed at both ends are connected in series. In a light emitting device including semiconductor element modules arranged in parallel and a light-transmitting case member that accommodates the semiconductor element modules,A plurality of outwardly projecting partial cylindrical surfaces corresponding to the plurality of rows of semiconductor element arrays are respectively formed on the light incident side surface of the case member and the back surface opposite to the surface.Light that is provided in close contact with the back side of the case member and that is generated in the semiconductor element array and transmitted to the back side of the case member can be reflected to the front side of the case member.Made of scattering reflection type synthetic resinProvide a reflective memberThe reflective member has a plurality of partial cylindrical reflective surfaces that are in close contact with the plurality of partial cylindrical surfaces on the back surface of the case member.Is.
[0016]
  In this case, the claim4However, since the semiconductor element module in which the semiconductor element arrays are arranged in parallel is housed in the light transmissive case member, the light generated by the semiconductor element module is on both the front and back sides of the case member. However, since the light on the back surface side is reflected by the reflecting member and emitted to the front surface side, all the light generated by the semiconductor element module can be efficiently emitted to the front surface side of the case member.
[0017]
  here,in frontThe reflective member is made of a synthetic resin plate-like reflector adhered to the back surface of the case member (claims)4 or 5Claims dependent on6), By using a plate-like reflector such as white scattering reflection type polycarbonate, the reflection efficiency can be ensured and the case member can be reinforced.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a solar battery module 19A (semiconductor) in which a solar battery array 19 (semiconductor element array) in which a plurality of solar battery cells 10 are electrically connected in series is arranged in parallel in a plurality of rows in a light transmissive case member 2. This is an example when the present invention is applied to a panel-like solar cell device 1 (corresponding to an element module) (corresponding to a power generation device using a spherical semiconductor element).
[0019]
  First, the solar cell array 19 will be described. As shown in FIGS. 1 to 2, the solar cell array 19 has a configuration in which a plurality of (for example, five) solar cells 10 are connected in series. In this case, one rectifier diode is provided in the solar cell array 19. 20 is additionally connected. The solar battery cell 10 is demonstrated based on FIG.
[0020]
  The spherical solar battery cell 10 is produced by, for example, manufacturing a spherical crystal 11 made of p-type silicon semiconductor having a diameter of 1.5 mm and a resistivity of about 1 Ωcm using a semiconductor spherical crystal manufacturing apparatus (not shown). That is, as the inventor filed in WO98 / 15983, an n-type diffusion layer 12 and a pn junction 13 are formed in the vicinity of the surface of the spherical crystal 11, and surface protection and antireflection are further formed on the surface of the spherical crystal 11. For this purpose, a light-transmissive insulating film 14 is formed. A positive electrode 15 electrically connected to the p-type silicon and a negative electrode 16 electrically connected to the n-type diffusion layer 12 are formed.
[0021]
  Further, the surface of the positive electrode 15 is covered with an Al paste film 17 having a thickness of about 20 μm, and the surface of the negative electrode 16 is covered with an Ag paste film 18 having a thickness of about 20 μm. In order to configure the solar battery array 19 by connecting the solar battery cells 10 in series, both electrodes 15 and 16 of the solar battery cell 10 are provided at opposite ends. Here, a photovoltaic power generation unit is configured by the spherical crystal 11, the n-type diffusion layer 12 on the surface, the pn junction 13, and the like.
[0022]
  As shown in FIG. 1 and FIG. 2, on the front surface (front surface) and back surface (rear surface) of a rectangular plate-shaped case member 2 made of light-transmitting synthetic resin (for example, polycarbonate resin). The solar cell module 19A in which the partial cylindrical surface-shaped curved surfaces 2a bulging outward are formed in four rows, and the solar cell arrays 19 accompanied by the rectifier diodes 20 are arranged in four rows correspond to both curved surfaces 2a. The case member 2 is housed in an embedded state. When the output is increased by connecting a plurality of solar cell arrays 19 in parallel, the rectifier diode 20 has a difference in photovoltaic power between the solar cell arrays 19 and is lower than the solar cell array 19 with higher electromotive force. This is because a reverse current flows through the solar cell array 19 to prevent the solar cell array 19 from being heated.
[0023]
  Here, the rectifier diode 20 will be briefly described. As shown in FIG. 4, a p-type diffusion layer 22 and a pn junction 23 in which a p-type impurity is diffused are formed in a spherical crystal 21 made of an n-type silicon semiconductor. Then, the same TiO2 insulating film 14, negative electrode 15a, positive electrode 16a, and paste films 17 and 18 are formed. The positive electrode lead pin 3 and the Al paste film 17 of the solar cell 10 on the near side are connected, the negative electrode lead pin 4 and the Ag paste film 18 of the rectifier diode 20 are connected, and these lead pins 3 and 4 are connected to an external circuit. It is connected to the.
[0024]
  A reflective plate 5 (which corresponds to a reflective member) made of a scattering reflection type synthetic resin (for example, white scattering reflection type polycarbonate) is adhered to the back surface side (the back side in FIG. 2) of the case member 2 in a close contact state. . That is, since the reflecting plate 5 is opaque and reflective, the contact surface that contacts the lower surface of the curved surface 2a of the case member 2 of the reflecting plate 5 isPartial cylindricalA plurality of solar cells 10 corresponding to each of the solar cells 10 acting as the reflecting surface 5aThe opposite ofShooting surface 5a(Partial cylindrical surface)Are formed continuously. For this reason, which sunlight 25 is incident from the surface side of the case member 2 and transmitted through the case member 2 is anyThe opposite ofThe reflecting surface 5a reliably reflects toward the solar cell array 19.
[0025]
  Next, the reflecting action of the sunlight 25 by the reflecting plate 5 will be described with reference to FIG. When the solar cell device 1 is irradiated with sunlight 25, the pn junction 13 separates photoexcited carriers (electrons and holes) by the sunlight 25 directly irradiated to the solar cell 10 through the curved surface 2a. To generate photovoltaic power.
[0026]
  By the way, the sunlight 25 irradiated to the case member 2 between the curved surfaces 2a from various directions passes through the case member 2 without being incident on the solar battery cell 10, but the upper side of the reflector 5The opposite ofSince the light is reflected by the incident surface 5a and is forcibly redirected toward the solar battery cell 10, the pn junction 13 generates a larger current due to the reflected sunlight 25. Here, the solar cell 10 can generate a maximum of about 0.6 V by the received sunlight 25. It should be noted that cylindrical housing holes may be formed in four rows inside the case member 2 corresponding to both curved surfaces 2a, and the solar cell array 19 may be housed in these housing holes.
[0027]
  Here, as shown in FIG. 6, you may comprise 1 A of solar cell apparatuses which changed the said solar cell apparatus 1 partially. That is, the reflector 5A and the case member 2A are in contact with each other.Partial cylindricalEach of the reflection surfaces 5a is formed in a minute uneven shape (a jagged shape). In this case, the sun light 25 irradiated to the case member 5A between the curved surfaces 2a does not transmit through the case member 5A regardless of the irradiation direction, and is uneven.The opposite ofSince it is irregularly reflected by the incident surface 5a and is forced to change the direction toward the solar battery cell 10, the power generation efficiency by the solar battery cell 10 can be further improved.
[0028]
  Furthermore, you may comprise the solar cell apparatus 1B as shown in FIG. That is, the case member 2B is made of a synthetic resin such as light-transmitting polycarbonate and is formed in a tube shape, and a pair of rectifier diodes 20 and the solar cell array 19 are accommodated in the case member 2B. With the 2Bs adjacent to each other, the lower half of each of the case members 2B is fixed to the reflecting plate 5B in an embedded and close contact state. Also in this case, the sunlight 25 that has passed through the case member 2B without being incident on the solar battery cell 10 isPartial cylindricalThe solar cell 10 is reliably reflected by the reflective surface 5a and irradiated to the solar cell 10, so that the power generation efficiency by the solar cell 10 can be further improved.
[0029]
  The panel-shaped solar cell device 1 described above is arranged in a matrix as shown in FIG. 8 on the substrate, and the lead pins 3 and 4 of each solar cell device 1 are directly connected to an external circuit via a terminal 26. A large panel solar cell device 1C connected in parallel may be configured. In this case, by increasing the light receiving area of the sunlight 25, it becomes possible to increase the voltage and / or current of the solar cell. For example, by connecting a plurality of solar cell devices 1 provided for each stage in parallel to form a solar cell device set, for example, 3 V is generated from each solar cell device set. 6V and 9V are generated by connecting two or three-stage solar cell device sets in series.
[0030]
  Further, as shown in FIG. 9, a large number (for example, 50 to 100) of solar cells 10 are connected in series to form a solar cell array 19, and the large number of solar cell arrays 19 are externally connected via a terminal 26. You may comprise panel-shaped solar cell apparatus 1D connected in parallel with the circuit. In this case as well, by increasing the light receiving area of the sunlight 25, it is possible to increase the voltage and / or current of the solar cell. That is, the generated voltage can be changed according to the number of solar cells 10 provided in the solar cell array 19, and the generated current can be changed according to the number of solar cell arrays 19 connected in parallel.
[0031]
  Further, as shown in FIG. 10, the above-described panel-like solar cell device 1 is arranged in a matrix on the entire surface of the hemispherical dome-shaped core member 28, and lead pins of each solar cell device 1 are connected to terminals (not shown). A hemispherical solar cell device 1E that is directly connected to an external circuit and / or connected in parallel may be configured. In this case, not only can the light receiving area be expanded, but even if the irradiation direction of the sunlight 25 changes, the sunlight 25 can always be received under the same light receiving conditions, and a higher voltage and / or higher current as a solar cell can be obtained. Can be realized.
[0032]
Second embodiment (FIGS. 11 and 12)
  This cylindrical solar cell device 30 accommodates the above-described solar cell array 19 embedded in a case member 31 formed in a tube shape made of a synthetic resin such as a light-transmitting polycarbonate. A reflecting plate 34 made of a synthetic resin such as white scattering reflection type polycarbonate is adhered to the back side (the back side in FIG. 11) in a close contact state. However, the rectifier diode 20 is unnecessary and has been removed. Also in this case, as shown in FIG. 12, the pn junction 13 is photoexcited carriers (electrons and electrons) by sunlight 25 that is directly incident on the solar battery cell 10 through the case member 31 as in the above embodiment. To generate photovoltaic power.
[0033]
  Furthermore, since any sunlight 25 irradiated to the case member 31 without entering the solar battery cell 10 is reliably reflected by the hemispherical reflecting surface 34a of the reflector plate 34 and irradiated to the solar battery cell 10, The power generation efficiency by the battery cell 10 can be improved. Here, similarly to the above embodiment, a cylindrical accommodation hole may be formed inside the case member 31, and the solar cell array 19 may be accommodated in the accommodation hole.
[0034]
  By the way, as shown in FIG. 13, a plurality of (for example, seven) cylindrical solar cell arrays 19 in which the solar cell array 19 shown in FIG. The solar cell module 40 may be configured by closely filling the solar cell module with a synthetic resin reflective member 41 made of white scattering reflection type polycarbonate or the like at the center of the solar cell module 19B. .
[0035]
  In this case, since the solar cell device 40 can receive the sunlight 25 from various directions, the light receiving direction of the sunlight 25 is not restricted, and the photovoltaic power is efficiently generated by the sunlight 25 from any direction. Can be generated.
[0036]
[0037]
  By the way, instead of the solar cell 10 described above, a light emitting device using various light emitting diodes of an electro-optic conversion type having an electro-optic conversion portion, an electrode, etc. is configured, and various light reflecting diodes are provided on the light emitting device to improve luminous efficiency. You may make it raise. Here, as a spherical light emitting diode used in this light emitting device, for example, a spherical blue light emitting diode 60 described in International Publication No. WO99 / 10935 filed by the inventor is illustrated.14A brief explanation based on the above.
[0038]
  The spherical blue light-emitting diode 60 has a GaN buffer layer (thickness of about 30 nm) 62 and an n-type GaN layer (thickness of about 3000 nm) on the surface of a core material 61 made of true spherical single crystal sapphire and having a diameter of about 1.5 mm. 63, In0.4Ga0.6N active layer (thickness of about 3 nm) 64, p-type Al0.2Ga0.8N layer (thickness of about 400 nm) 65, p-type GaN layer (thickness of about 500 nm) 66 are sequentially formed. A cathode 67 is formed by opening a window 67 having a diameter of about 600 μm reaching the n-type GaN layer 63, and an anode 69 in contact with the surface of the p-type GaN layer 66 is formed on the surface opposite to the cathode 68. is there. When a forward current is applied by applying a voltage from the anode 69 to the cathode 68 from the outside, the light emitting diode 60 emits blue light.
[0039]
  That is, in the panel-shaped solar cell device 1 shown in FIG. 1, a rectifier diode 20 is omitted, and instead of the solar cell module 19A, a plurality of light-emitting diode arrays in which a plurality of light-emitting diodes 60 are connected in series are arranged in parallel. A panel light emitting device is configured by applying the light emitting diode module. In this case, the light generated in the light emitting diode module is emitted to both the front and back sides of the case member 5, but the light on the back side is also reflected on the front side by the reflector 5, so that all the light generated in the light emitting diode module is reflected. It can be made to emit efficiently to the surface side of case member 5, and luminous efficiency can be raised greatly. Further, in the various solar cell devices 1A to 1E described above, similarly, the rectifier diode 20 may be omitted, and a light emitting diode module may be applied instead of the solar cell module 19 to constitute various light emitting devices. .
[0040]
  Moreover, it replaces with the solar cell array 19 of the cylindrical solar cell apparatus 30 shown in FIG. 11, and applies the light emitting diode array which connected the some light emitting diode 60 in series, and comprises a cylindrical light-emitting device. In this case, the light generated in the light emitting diode array is emitted to both the front and back sides of the case member 31, but the light on the back side is reflected on the front side, so that all the light generated in the light emitting diode array is reflected by the reflecting plate 34. The light can be efficiently reflected on the surface side of the case member 31, and the light emission efficiency can be increased. Furthermore, the various solar cell devices 4 described above.To zeroSimilarly, various light emitting devices may be configured by applying a light emitting diode module instead of the solar cell module.
[0041]
  A modification of the embodiment will be described.
1] For each of the solar cell devices 1, 1A to 1E, 30, 40 described above, a reflective film may be provided instead of the reflective plate.
2] The reflection plates 5, 5A, 5B, and 34 may be made of various synthetic resin materials that are opaque, heat resistant, and capable of reflecting light, in addition to the white scattering reflection type polycarbonate.
3] The reflection surface, which is the contact surface of the reflection plates 5, 5A, 5B, and 34, with the case member may be formed in a fine wave shape, or the period and height of this wave may be changed irregularly.
[0042]
4] The present invention is not limited to the embodiment described above, and various modifications are made without departing from the spirit of the present invention, and the present invention is applied to a power generation device and a light emitting device using various spherical semiconductor elements. It is possible.
[0043]
【The invention's effect】
  According to the first aspect of the present invention, the semiconductor device array and the light transmissive case member are provided, and the light which is provided in close contact with the back surface side of the case member and is incident from the front surface side of the case member and transmitted through the case member. Since a reflecting member that can be reflected toward the semiconductor element array is provided, the semiconductor element array can receive not only the direct light incident on the case member but also the reflected light reflected by the reflecting member. The photovoltaic power generated by the semiconductor element can be increased, and the photoelectric conversion efficiency can be significantly increased.
[0044]
  According to the second aspect of the present invention, the semiconductor device module includes a semiconductor element module in which a plurality of semiconductor element arrays in which a plurality of spherical semiconductor elements are connected in series are arranged in parallel, and a light transmissive case member. And a reflection member that can reflect the light incident from the surface side of the case member and transmitted through the case member toward the semiconductor element array, so that the semiconductor element module is not only the direct light incident on the case member, Since the reflected light reflected by the reflecting member can also be received, the amount of received light is increased, the photovoltaic power generated by the spherical semiconductor element is further increased, and the photoelectric conversion efficiency can be remarkably increased.
[0045]
  ContractClaim3According to the invention, since the reflecting member is made of a synthetic resin plate-like reflector closely adhered to the back surface of the case member, the reflection efficiency can be improved by using a plate-like reflector such as a white scattering reflection type polycarbonate. The case member can be reinforced. Other effects similar to those of the first or second aspect are achieved.
[0046]
  Claim4According to the invention, a semiconductor element array in which a plurality of spherical semiconductor elements are connected in series and a light transmissive case member are provided, and are provided in close contact with the back side of the case member and generated in the semiconductor element array. Since the reflection member that can reflect the light transmitted to the back side to the front side of the case member is provided, the light generated by the semiconductor element array is emitted to both the front and back sides of the case member, but the light on the back side is reflected by the reflection member Therefore, all the light generated in the semiconductor element array can be efficiently reflected on the surface side of the case member, and the light emission efficiency can be increased.
[0047]
  Claim5According to the invention, a semiconductor element module in which a plurality of semiconductor element arrays in which a plurality of spherical semiconductor elements are connected in series are arranged in parallel to each other and a light-transmissive case member are provided, and are provided in close contact with the back surface side of the case member. In addition, since the reflection member capable of reflecting the light generated in the semiconductor element array and transmitted to the back side of the case member to the front side of the case member is provided, the light generated in the semiconductor element module is emitted to both the front and back sides of the case member. However, since the light on the back side is reflected by the reflecting member and emitted to the front side, all the light generated by the semiconductor element module can be efficiently emitted to the front side of the case member, and the luminous efficiency is markedly improved. Can be increased.
[0048]
  Claim6According to the invention, the reflection member is made of a synthetic resin plate-like reflector closely adhered to the back surface of the case member.3The same effect can be obtained. Other claims4 or 5Has the same effect as.
[Brief description of the drawings]
FIG. 1 is a perspective view of a solar cell device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a solar cell device.
FIG. 3 is a cross-sectional view of a solar battery cell.
FIG. 4 is a cross-sectional view of a rectifier diode.
FIG. 5 is a longitudinal front view taken along the line EE of FIG. 2;
6 is a partially enlarged vertical front view of FIG. 5 according to a modified embodiment.
FIG. 7 is a view corresponding to FIG. 5 according to a modified embodiment.
FIG. 8 is a plan view of a solar cell device including a plurality of panels.
FIG. 9 is a plan view of a solar cell device in which a large number of solar cell arrays are arranged in parallel.
FIG. 10 is a perspective view of a hemispherical solar cell device.
FIG. 11 is a cross-sectional view of a solar cell device according to a second embodiment.
12 is a front elevational view taken along line LL in FIG. 11. FIG.
FIG. 13 is a perspective view of a solar cell device including a plurality of cylindrical solar cell modules.
FIG. 14It is sectional drawing of a spherical blue light emitting diode.
[Explanation of symbols]
One-panel solar cell device
1A-1E solar cell device
Two case members
5 reflectors
5A, 5B reflector
5a hemispherical reflective surface
10 solar cells
15 positive electrodes
16 negative electrode
19 solar cell array
19A solar cell module
19B solar cell module
25 sunlight
30 cylindrical solar cell device
34 reflector
40 solar cell equipmentPlace
60 spherical blue light emitting diode

Claims (6)

A semiconductor element array in which a plurality of spherical semiconductor elements each having a photovoltaic generation portion formed in a semiconductor spherical crystal and a pair of electrodes formed at both ends are connected in series, and a light transmitting property for accommodating the semiconductor element array In the power generation device comprising the case member,
On the light incident side surface of the case member and on the back surface on the opposite side of the surface, a partially cylindrical surface projecting outward corresponding to the semiconductor element array is formed, respectively.
A reflective member made of a scattering reflection type synthetic resin that is provided in close contact with the back surface side of the case member and is capable of reflecting light incident from the front surface side of the case member and transmitted through the case member toward the semiconductor element array ,
The power generation apparatus using a spherical semiconductor element, wherein the reflection member has a partial cylindrical reflection surface that is in close contact with a partial cylindrical surface on a back surface of the case member . A semiconductor element module in which a plurality of semiconductor element arrays in which a plurality of spherical semiconductor elements formed by forming a photovoltaic generation portion in a semiconductor spherical crystal and forming a pair of electrodes at both ends are connected in series are arranged in parallel; In a power generation device including a light transmissive case member that accommodates the semiconductor element module,
A plurality of outwardly projecting partial cylindrical surfaces corresponding to the plurality of rows of semiconductor element arrays are respectively formed on the light incident side surface of the case member and the back surface opposite to the surface.
A reflective member made of a scattering reflection type synthetic resin that is provided in close contact with the back surface side of the case member and is capable of reflecting light incident from the front surface side of the case member and transmitted through the case member toward the semiconductor element array ,
The power generation apparatus using a spherical semiconductor element, wherein the reflection member has a plurality of partial cylindrical reflection surfaces that are in close contact with the plurality of partial cylinder surfaces on the back surface of the case member .   3. The power generation device using the spherical semiconductor element according to claim 1, wherein the reflection member is made of a synthetic resin plate-like reflector closely adhered to the back surface of the case member. A semiconductor element array in which a plurality of spherical semiconductor elements each having an electro-optic conversion portion formed in a semiconductor spherical crystal and a pair of electrodes formed at both ends thereof are connected in series, and a light-transmitting case for housing the semiconductor element array In a light emitting device comprising a member,
On the light emitting side surface of the case member and on the back surface on the opposite side of the surface, a partially cylindrical surface projecting outward corresponding to the semiconductor element array is formed, respectively.
A reflection member made of a scattering reflection type synthetic resin that is provided in close contact with the back surface side of the case member and can reflect the light generated in the semiconductor element array and transmitted to the back surface side of the case member to the front surface side of the case member ,
The light-emitting device using a spherical semiconductor element, wherein the reflective member has a partial cylindrical reflective surface that is in close contact with the partial cylindrical surface on the back surface of the case member . A semiconductor element module in which a plurality of semiconductor element arrays in which a plurality of spherical semiconductor elements each having an electro-optic conversion portion formed in a semiconductor spherical crystal and a pair of electrodes formed at both ends are connected in series are arranged in parallel, and the semiconductor In a light-emitting device including a light-transmissive case member that houses an element module,
A plurality of outwardly projecting partial cylindrical surfaces corresponding to the plurality of rows of semiconductor element arrays are respectively formed on the light incident side surface of the case member and the back surface opposite to the surface.
A reflection member made of a scattering reflection type synthetic resin that is provided in close contact with the back surface side of the case member and can reflect the light generated in the semiconductor element array and transmitted to the back surface side of the case member to the front surface side of the case member ,
The light-emitting device using a spherical semiconductor element, wherein the reflective member has a plurality of partial cylindrical reflective surfaces that are in close contact with a plurality of partial cylindrical surfaces on the back surface of the case member . 6. The light emitting device using a spherical semiconductor element according to claim 4 , wherein the reflecting member is made of a synthetic resin plate-like reflector adhered to the back surface of the case member.

Images