JP2006260792A - Organic el device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic EL device having a construction hardly generating scatter of brightness even if scatter of film thickness is generated on an organic material formed in a bank (barrier rib). <P>SOLUTION: The organic EL device has a barrier rib part 112 demarcating pixel areas R, G, B, on a substrate 2. An anode 111, an organic EL layer 110b, and a cathode 12 are laminated on the pixel areas R, G, B. The outer peripheral area 111g of the anode 111 is located inside the outer peripheral area of the organic EL layer 110b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an organic EL device and an electronic apparatus.

As an organic EL device (organic electroluminescence device) that is a self-luminous display device, there is a configuration in which a hole transport layer or a light emitting layer made of an organic material is sandwiched between an anode and a cathode. In manufacturing such an organic EL device, the hole transport layer and the light emitting layer using an organic material are preferably formed by a spin coat method or an ink jet method. In particular, when the inkjet method is used as in Patent Document 1, a bank is formed on the anode in order to form a film on a target pixel, and an organic material (hole transport layer forming material) is formed by forming such a bank. Alternatively, the droplets containing the light emitting layer forming material) and the solvent stably land in the pixel.
JP-A-10-153967

  When the ink jet method as in Patent Document 1 is used, a target hole transport layer or a light emitting layer is formed through a solvent removal process after landing a droplet in a pixel. Here, when a film is formed from a droplet state through a drying process, there is a difference in the affinity between the bank and the surface state on the anode between the central portion and the outer peripheral portion (end portion) of the pixel surrounded by the bank. Due to this, there may be a variation in film thickness. In particular, the film thickness tends to be large at the outer periphery of the pixel and small at the center of the pixel.

  The relationship between the film thickness of the light-emitting layer and the current tends to be almost the same as that of a conductive polymer that is generally said, and current variation can occur due to the square to the cube of the film thickness. Considering that the relationship between current and luminance is close to linear, in order to suppress variations in luminance in a certain range, variations in film thickness must be strictly suppressed. On the other hand, as long as the bank is formed, it is difficult to avoid the variation in film thickness that occurs at the central portion and the outer peripheral portion of the pixel as described above.

  The present invention has been made in view of the above-described problems, and has a configuration in which luminance variation hardly occurs even when the film thickness of the organic material formed in the bank (partition wall) varies. Another object of the present invention is to provide an organic EL device. It is another object of the present invention to provide a highly reliable electronic device including such an organic EL device.

  In order to solve the above-described problems, an organic EL device according to the present invention is formed with a partition portion for partitioning a plurality of pixel regions on a substrate, and the pixel region includes at least a first electrode and an organic EL device. The organic EL layer is formed in a region surrounded by the partition wall, and at least one of the first electrode and the second electrode is formed by laminating a layer and a second electrode. A pattern is formed for each pixel region, and the outer edge of the electrode is formed so as to be located inside the outer edge of the organic EL layer.

  According to such an organic EL device, since the outer edge of at least one electrode is located inside the outer edge of the organic EL layer, the electrode formation region is inside the organic EL layer formation region in plan view, that is, organic At least one electrode is not formed at a position overlapping the outer peripheral portion of the EL layer in plan view. Accordingly, in the organic EL layer formed in the pixel region, for example, even when the film thickness varies (difference) between the central portion and the outer peripheral portion of the pixel region for manufacturing reasons, the outer peripheral portion of the organic EL layer Since no electrode is formed at a position overlapping with, the outer peripheral portion does not contribute to light emission. As a result, uniform light emission can be obtained without luminance variations caused by variations in film thickness. In addition, there is no variation in lifetime due to variations in luminance, and as a result, the lifetime of the organic EL device can be improved.

  The first electrode may be configured as a pixel electrode patterned for each pixel region on the substrate. When such a pixel electrode formation region is determined in relation to the organic EL layer formation region as described above, the organic EL device of the present invention can be suitably provided. The second electrode may be configured as a counter electrode that is formed in a solid shape across the pixel regions. By forming the first electrode so that the outer edge of the pixel electrode is positioned on the inner side of the outer edge of the organic EL layer as described above with respect to the counter electrode formed in a solid shape on the entire surface, It can provide suitably. Further, the organic EL device can be configured with the first electrode as an anode and the second electrode as a cathode.

  The partition wall portion is formed on the first partition wall portion to form a first opening region having a relatively small opening area, and a second opening region having a relatively large opening area is formed on the first partition wall portion. It can have two partition walls. In this case, for example, the first electrode is formed inside the pixel region surrounded by the first partition part that forms a relatively small opening, and the organic EL layer is the second partition part that forms a relatively large opening. The organic EL device of the present invention can be suitably provided if it is formed inside the pixel region surrounded by.

  The organic EL layer may be formed by applying a liquid material in which an organic material constituting the organic EL layer is dissolved or dispersed in a solvent to a region surrounded by the partition wall. . When the liquid phase method in which an organic EL layer is formed by applying a liquid material to the region surrounded by the partition wall, the thickness of the organic EL layer depends on the degree of wettability with respect to the partition wall. However, if the configuration of the present invention is adopted for an organic EL device including an organic EL layer formed by such a liquid phase method, the problem of non-uniform film thickness is caused. It can be solved as described above. As the liquid phase method, specifically, a droplet discharge method using a droplet discharge device (inkjet device) can be exemplified.

  Next, in order to solve the above-described problems, an electronic apparatus according to the present invention includes the organic EL device. In this case, it is possible to provide a highly reliable electronic device with little emission unevenness.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing to be referred to, the scale may be different for each layer or each member in order to make the size recognizable on the drawing.

(First embodiment)
FIG. 1 shows an embodiment of an organic EL device of the present invention, and is a diagram schematically showing an active matrix type organic EL device in particular. Note that the organic EL device 1 shown in FIG. 1 employs an active driving method using thin film transistors.

  An organic EL device 1 includes a circuit element unit 14 including a thin film transistor as a circuit element, an anode (pixel electrode) 111, a functional layer 110 including an organic EL layer (organic EL element), and a cathode (counter electrode) on a substrate 2. 12 and the sealing portion 3 and the like are sequentially laminated.

  As the substrate 2, a glass substrate is used in this example. In addition to the glass substrate, various known substrates such as a silicon substrate, a quartz substrate, a ceramic substrate, a metal substrate, a plastic substrate, and a plastic film substrate are used. In the substrate 2, a plurality of pixel areas A as light emitting areas are arranged in a matrix, and when performing color display, for example, corresponding to each color of red (R), green (G), and blue (B) The pixel area A to be configured is configured in a predetermined arrangement. In each pixel region A, an anode 111 is arranged, and in the vicinity thereof, a signal line 132, a power supply line 133, a scanning line 131, and other anode scanning lines (not shown) are arranged. As the planar shape of the pixel region A, an arbitrary shape such as a circle or an oval is applied in addition to the rectangle shown in the figure.

  The sealing portion 3 prevents water and oxygen from entering and prevents the cathode 12 or the functional layer 110 from being oxidized. The sealing portion 3 is applied to the substrate 2 and the sealing is bonded to the substrate 2. Substrate 3b (sealing can) is included. As the material of the sealing resin, for example, a thermosetting resin or an ultraviolet curable resin is used, and in particular, an epoxy resin that is one kind of thermosetting resin is preferably used. The sealing resin is annularly applied to the periphery of the substrate 2 and is applied by, for example, a microdispenser. The sealing substrate 3b is made of glass, metal, or the like, and the substrate 2 and the sealing substrate 3b are bonded together via a sealing resin.

FIG. 2 shows a circuit structure of the organic EL device 1.
On the substrate 2 shown in FIG. 1, a plurality of scanning lines 131 as shown in FIG. 2, a plurality of signal lines 132 extending in a direction intersecting the scanning lines 131, and a plurality of signals extending in parallel to the signal lines 132. The power supply line 133 is wired. Further, the pixel region A is formed at each intersection of the scanning line 131 and the signal line 132.
For example, the data line driving circuit 103 including a shift register, a level shifter, a video line, and an analog switch is connected to the signal line 132. The scanning line 131 is connected to a scanning side driving circuit 104 including a shift register and a level shifter.

  In the pixel region A, a first thin film transistor 123 for switching in which a scanning signal is supplied to the gate electrode via the scanning line 131 and a holding for holding an image signal supplied from the signal line 132 via the thin film transistor 123. A capacitor 135, a second driving thin film transistor 124 to which an image signal held by the holding capacitor 135 is supplied to the gate electrode, and the power line 133 when electrically connected to the power line 133 through the thin film transistor 124 An anode (pixel electrode) 111 into which a drive current flows from and a functional layer 110 sandwiched between the anode 111 and the cathode (counter electrode) 12 are provided. The functional layer 110 includes an organic EL layer as an organic EL element.

  In the pixel region A, when the scanning line 131 is driven and the first thin film transistor 123 is turned on, the potential of the signal line 132 at that time is held in the holding capacitor 135, and the second potential is changed depending on the state of the holding capacitor 135. The conductive state of the thin film transistor 124 is determined. In addition, a current flows from the power supply line 133 to the anode 111 through the channel of the second thin film transistor 124, and further a current flows to the cathode (counter electrode) 12 through the functional layer 110. The functional layer 110 emits light according to the amount of current at this time.

FIG. 3 is an enlarged view showing a cross-sectional structure of the display area in the organic EL device 1. FIG. 3 shows a cross-sectional structure of three pixel regions corresponding to red (R), green (G), and blue (B) colors. As described above, the organic EL device 1 includes the circuit element unit 14 in which circuits such as TFTs are formed on the substrate 2, the anode (pixel electrode) 111, the light emitting element unit 11 in which the functional layer 110 is formed, and A cathode (counter electrode) 12 is sequentially laminated.
In the organic EL device 1, light emitted from the functional layer 110 to the substrate 2 side passes through the circuit element unit 14 and the substrate 2 and is emitted to the lower side (observer side) of the substrate 2, and the functional layer 110. The light emitted from the opposite side of the substrate 2 is reflected by the cathode 12, passes through the circuit element unit 14 and the substrate 2, and is emitted to the lower side (observer side) of the substrate 2.

In the circuit element portion 14, a base protective film 2c made of a silicon oxide film is formed on the substrate 2, and an island-shaped semiconductor film 141 made of polycrystalline silicon is formed on the base protective film 2c. Note that a source region 141a and a drain region 141b are formed in the semiconductor film 141 by high concentration P ion implantation. A portion where P is not introduced is a channel region 141c.
Further, a transparent gate insulating film 142 that covers the base protective film 2c and the semiconductor film 141 is formed in the circuit element portion 14, and a gate electrode 143 made of Al, Mo, Ta, Ti, W, or the like is formed on the gate insulating film 142. (Scanning lines) are formed, and a transparent first interlayer insulating film 144 a and a second interlayer insulating film 144 b are formed on the gate electrode 143 and the gate insulating film 142. The gate electrode 143 is provided at a position corresponding to the channel region 141 c of the semiconductor film 141. Contact holes 145 and 146 are formed through the first and second interlayer insulating films 144a and 144b and connected to the source and drain regions 141a and 141b of the semiconductor film 141, respectively.

On the second interlayer insulating film 144b, a transparent anode 111 made of ITO or the like is patterned and formed in a predetermined shape, and one contact hole 145 is connected to the anode 111.
The other contact hole 146 is connected to the power line 133.
In this way, the driving thin film transistor 123 connected to each anode 111 is formed in the circuit element section 14. The circuit element unit 14 is also formed with the storage capacitor 135 and the switching thin film transistor 124 described above, but these are not shown in FIG.

  The light emitting element unit 11 is mainly configured by a functional layer 110 stacked on each of the plurality of anodes 111 and a bank unit 112 disposed between the functional layers 110 to partition the functional layers 110. . A cathode 12 is disposed on the functional layer 110. The organic EL element 10 which is a light emitting element includes an anode 111, a cathode 12, a functional layer 110, and the like.

  The anode 111 is made of ITO, and is formed by patterning into a substantially rectangular shape in plan view. The thickness of the anode 111 is preferably in the range of 50 nm to 200 nm, particularly about 150 nm.

  The bank 112 is formed of a heat-resistant and solvent-resistant resist (organic material) such as acrylic resin or polyimide resin. In addition, the bank part 112 has a first opening region 112d that is a region that partitions the anode 111 and a second opening that is a region that partitions the functional layer 110 (the hole injection / transport layer 110a and the organic EL layer 110b). Region 112e, and has a step structure. Note that the opening diameter of the first opening region 112d is smaller than the opening diameter of the second opening region 112e.

  The functional layer 110 includes a hole injection / transport layer 110a stacked on the anode 111, and an organic EL layer (light emitting layer) 110b formed adjacent to the hole injection / transport layer 110a. .

  The hole injection / transport layer 110a has a function of injecting holes into the organic EL layer 110b and a function of transporting holes inside the hole injection / transport layer 110a. By providing such a hole injection / transport layer 110a between the anode 111 and the organic EL layer 110b, device characteristics such as light emission efficiency and lifetime of the organic EL layer 110b are improved. Further, in the organic EL layer 110b, holes injected from the hole injection / transport layer 110a and electrons injected from the cathode 12 are recombined in the organic EL layer, and light emission is obtained.

The organic EL layer 110b emits light from the red organic EL layer 110b ₁ that emits red (R), the green organic EL layer 110b ₂ that emits green (G), and the blue organic EL layer 110b ₃ that emits blue (B). The organic EL layers 110b _{1 to} 110b ₂ are arranged in a predetermined arrangement (for example, a stripe shape).

  Here, in the organic EL device 1 of the present embodiment, the outer edge 111g of the anode 111 is positioned inside the outer edge 110g of the organic EL layer 110b. In other words, the anode 111 and the organic EL layer 110b are arranged relative to each other so that the formation region of the anode 111 is inside the formation region of the organic EL layer 110b in plan view, and the anode 111 is planar in the peripheral region of the organic EL layer 110b. It is the structure which is not superposedly arranged.

  Therefore, in the organic EL layer 110b formed in the pixel region A (R, G, B in FIG. 3), for example, due to the affinity with the bank 112 and the difference in the surface state on the anode 111 during manufacturing, The anode 111 is not formed in the peripheral region of the organic EL layer 110b (the outer peripheral portion of the pixel region A) even when the film thickness varies between the central portion and the outer peripheral portion of the pixel region A. Thus, the peripheral region is not contributed to light emission. As a result, it is supposed that uniform light emission can be obtained without causing variations in luminance due to variations in film thickness in the organic EL layer 110b.

  In the organic EL device 1 of the present embodiment, the hole injecting / transporting layer 110a and the organic EL layer 110b are prepared by using a liquid composition obtained by dissolving or dispersing an organic material constituting them in a solvent by an inkjet method (liquid A film is formed by selectively discharging by a droplet discharge method and then drying the liquid composition. Prior to the discharge, the surface of the bank 112 is subjected to a liquid repellent treatment, and the anode 111 is subjected to a lyophilic treatment. In the hole injection / transport layer 110a and the organic EL layer 110b, variations in film thickness as described above can occur.

  Next, the cathode (counter electrode) 12 is formed on the entire surface of the light emitting element portion 11, and plays a role of passing a current through the functional layer 110 in a pair with the anode 111. In this example, the cathode 12 is formed by laminating a calcium layer 12a and an aluminum layer 12b.

(Second Embodiment)
Next, a second embodiment of the organic EL device of the present invention will be described with reference to FIG. In addition, description is abbreviate | omitted as what has the structure similar to 1st Embodiment except the component demonstrated by this 2nd Embodiment.

In the organic EL device 1 of the first embodiment, the bank 112 is made of an organic material having a step structure. However, in the organic EL device 1a of the second embodiment, two bank layers having different opening diameters are provided. By layering, a step structure was formed. Specifically, as shown in FIG. 4, an inorganic bank layer 112a (first bank layer) located on the substrate 2 side and an organic bank layer 112b (second bank layer) located away from the substrate 2 are stacked. Configured. The inorganic bank layer 112a is made of an inorganic material such as SiO ₂ or TiO ₂ , for example. The organic bank layer 112b is formed of a resist having heat resistance and solvent resistance such as acrylic resin and polyimide resin.

  Also in the second embodiment, the outer edge 111g of the anode 111 is located inside the outer edge 110g of the organic EL layer 110b. In other words, the anode 111 and the organic EL layer 110b are arranged relative to each other so that the formation region of the anode 111 is inside the formation region of the organic EL layer 110b in plan view, and the anode 111 is planar in the peripheral region of the organic EL layer 110b. It is the structure which is not superposedly arranged.

  Therefore, in the organic EL layer 110b formed in the pixel region A, the central portion and the outer peripheral portion of the pixel region A are caused by, for example, the affinity with the bank portion 112 and the difference in the surface state on the anode 111 during manufacturing. Even when the film thickness varies (difference), the anode 111 is not formed in the peripheral region of the organic EL layer 110b (the outer peripheral portion of the pixel region A), so that the peripheral region contributes to light emission. Will not be. As a result, it is supposed that uniform light emission can be obtained without causing variations in luminance due to variations in film thickness in the organic EL layer 110b.

(Third embodiment)
Next, a third embodiment of the organic EL device of the present invention will be described with reference to FIG. In addition, description is abbreviate | omitted as what has the structure similar to 1st Embodiment except the component demonstrated by this 3rd Embodiment.

  In the first embodiment, the light emitted from the functional layer 110 is emitted to the lower side (observer side) of the substrate 2, whereas in the organic EL device 1b of the third embodiment, The light is emitted to the upper side (observer side) of the sealing substrate 3b. In the third embodiment, since light emission is extracted from the sealing substrate 3b side, which is the opposite side of the substrate 2, both the transparent substrate and the opaque substrate can be used as the substrate 2. Examples of the opaque substrate include a thermosetting resin and a thermoplastic resin in addition to a ceramic sheet such as alumina and a metal sheet such as stainless steel that has been subjected to an insulation treatment such as surface oxidation.

  Further, the anode 111 is not necessarily limited to a transparent material, and a material satisfying the function of the anode is used. A material having light reflectivity is preferable, and Al or the like is employed. In addition, when adopting transparent metal ITO etc. as the anode 111, the structure which forms Al thin film etc. in the lower layer, and has light reflectivity is preferable.

  Further, the material of the cathode 12c needs to have transparency, and a transparent metal such as ITO is employed. Here, an Al thin film (second cathode) may be formed with a film thickness having transparency between the first cathode made of ITO and the organic EL layer 110b. The film thickness having transparency is preferably 50 nm or less. By forming such an Al thin film, not only the electron injection property to the organic EL layer 110b is promoted, but also plasma damage when ITO is formed by sputtering is suppressed, and the cathode 12c is transmitted and penetrated. The organic EL layer 110b can be protected from moisture and oxygen. Further, as the material of the sealing substrate 3b, a suitable material having transparency is adopted.

  Also in the third embodiment, the outer edge 111g of the anode 111 is located inside the outer edge 110g of the organic EL layer 110b. In other words, the anode 111 and the organic EL layer 110b are arranged relative to each other so that the formation region of the anode 111 is inside the formation region of the organic EL layer 110b in plan view, and the anode 111 is planar in the peripheral region of the organic EL layer 110b. It is the structure which is not superposedly arranged.

  Therefore, in the organic EL layer 110b formed in the pixel region A, the central portion and the outer peripheral portion of the pixel region A are caused by, for example, the affinity with the bank portion 112 and the difference in the surface state on the anode 111 during manufacturing. Even when the film thickness varies (difference), the anode 111 is not formed in the peripheral region of the organic EL layer 110b (the outer peripheral portion of the pixel region A), so that the peripheral region contributes to light emission. Will not be. As a result, it is supposed that uniform light emission can be obtained without causing variations in luminance due to variations in film thickness in the organic EL layer 110b.

(Fourth embodiment)
Next, a fourth embodiment of the organic EL device of the present invention will be described with reference to FIG. In the organic EL device 1c of the fourth embodiment, the bank 112 of the organic EL device 1b of the third embodiment has a two-layer structure. Therefore, description of components other than those described below is omitted as having the same configuration as that of the third embodiment.

In the organic EL device 1b of the third embodiment, the bank 112 is made of an organic material having a step structure, but in the fourth embodiment, by stacking two bank layers having different opening diameters, A step structure was formed. Specifically, as shown in FIG. 6, an inorganic bank layer 112a (first bank layer) located on the substrate 2 side and an organic bank layer 112b (second bank layer) located away from the substrate 2 are stacked. Configured. The inorganic bank layer 112a is made of an inorganic material such as SiO ₂ or TiO ₂ , for example. The organic bank layer 112b is formed of a resist having heat resistance and solvent resistance such as acrylic resin and polyimide resin.

  Also in the second embodiment, the outer edge 111g of the anode 111 is located inside the outer edge 110g of the organic EL layer 110b. In other words, the anode 111 and the organic EL layer 110b are arranged relative to each other so that the formation region of the anode 111 is inside the formation region of the organic EL layer 110b in plan view, and the anode 111 is planar in the peripheral region of the organic EL layer 110b. It is the structure which is not superposedly arranged.

  Therefore, in the organic EL layer 110b formed in the pixel region A, the central portion and the outer peripheral portion of the pixel region A are caused by, for example, the affinity with the bank portion 112 and the difference in the surface state on the anode 111 during manufacturing. Even when the film thickness varies (difference), the anode 111 is not formed in the peripheral region of the organic EL layer 110b (the outer peripheral portion of the pixel region A), so that the peripheral region contributes to light emission. Will not be. As a result, it is supposed that uniform light emission can be obtained without causing variations in luminance due to variations in film thickness in the organic EL layer 110b.

(Fifth embodiment)
FIG. 7 shows an embodiment of an electronic apparatus of the present invention.
The electronic apparatus of this example includes the above-described organic EL device as display means. FIG. 7 is a perspective view showing an example of a mobile phone. Reference numeral 1000 denotes a mobile phone main body, and reference numeral 1001 denotes a display unit using the organic EL device. As described above, an electronic apparatus including the organic EL device according to the electro-optical device of the present invention as a display unit can obtain good light emission characteristics and has extremely high reliability.

  The organic EL device of each of the above embodiments is not limited to the mobile phone as described above, but an electronic book, a personal computer, a digital still camera, a viewfinder type or a monitor direct-view type video tape recorder, a car navigation device, a pager, an electronic It can be suitably used as image display means for devices such as notebooks, calculators, word processors, workstations, videophones, POS terminals, touch panels, etc., and any electronic device can provide a colorful and high-quality display. It has become a thing.

FIG. 3 is a perspective view showing the organic EL device according to the first embodiment with a part cut away. FIG. 2 is an equivalent circuit diagram of the organic EL device in FIG. 1. The partial cross section schematic diagram of the organic electroluminescent apparatus of FIG. The partial cross section schematic diagram of the organic electroluminescent apparatus of 2nd Embodiment. The partial cross section schematic diagram of the organic electroluminescent apparatus of 3rd Embodiment. The partial cross section schematic diagram of the organic electroluminescent apparatus of 4th Embodiment. The perspective view which shows one Embodiment of an electronic device.

Explanation of symbols

  2 ... Glass substrate (substrate), 12 ... Cathode (second electrode), 110b ... Organic EL layer, 110g ... Outer edge of organic EL layer, 111 ... Anode (first electrode), 111g ... Outer edge of anode, 112 ... Bank part (Partition wall), A (R, G, B)... Pixel region

Claims (8)

A partition wall that partitions and forms a plurality of pixel regions is formed on the substrate.
The pixel region is formed by stacking at least a first electrode, an organic EL layer, and a second electrode,
While the organic EL layer is formed in a region surrounded by the partition wall,
At least one of the first electrode and the second electrode is patterned for each pixel region, and the outer edge of the electrode is formed so as to be located inside the outer edge of the organic EL layer. A characteristic organic EL device.   The first electrode is configured as a pixel electrode patterned for each of the pixel regions on the substrate, and the outer edge of the first electrode is positioned inside the outer edge of the organic EL layer. The organic EL device according to claim 1, wherein the organic EL device is formed. Of the first electrode and the second electrode, only the first electrode is formed such that the outer edge of the first electrode is located inside the outer edge of the organic EL layer,
3. The organic EL device according to claim 1, wherein the second electrode is configured as a counter electrode formed across the pixel regions. 4.   The organic EL device according to any one of claims 1 to 3, wherein the first electrode is an anode and the second electrode is a cathode.   The partition wall portion is formed on the first partition wall portion to form a first opening region having a relatively small opening area, and a second opening region having a relatively large opening area is formed on the first partition wall portion. The organic EL device according to claim 1, further comprising two partition walls.   The organic EL layer is formed by applying a liquid material in which an organic material constituting the organic EL layer is dissolved or dispersed in a solvent to a region surrounded by the partition wall. The organic EL device according to any one of claims 1 to 5.   The organic EL device according to claim 6, wherein the organic EL layer is formed by a droplet discharge method.   An electronic apparatus comprising the organic EL device according to claim 1.

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