发明名称 |
Organic electroluminescence element and method of manufacturing thereof |
摘要 |
An organic light-emitting element comprising: an anode; a cathode; banks; a functional layer between the anode and the cathode; and a hole injection layer between the anode and the functional layer. The functional layer includes at least a light-emitting sublayer defined by the banks and that contains an organic material. The hole injection layer comprises tungsten oxide and includes a crystal of the tungsten oxide, whose particle diameter is on an order of nanometers. Tungsten atoms constituting the tungsten oxide include both tungsten atoms with a valence of six and tungsten atoms with a valence less than six. The hole injection layer has a surface facing the functional layer, and a portion of the surface overlapping with the light-emitting sublayer is located closer to the anode than other portions, thereby forming a recessed structure having a recessed portion whose inner surface is in contact with the functional layer. |
申请公布号 |
US9029842(B2) |
申请公布日期 |
2015.05.12 |
申请号 |
US201313742600 |
申请日期 |
2013.01.16 |
申请人 |
Joled Inc. |
发明人 |
Harada Kenji;Nishiyama Seiji;Komatsu Takahiro;Takeuchi Takayuki;Fujimura Shinya;Ohuchi Satoru;Fujita Hirofumi;Tsukamoto Yoshiaki |
分类号 |
H01L51/50;H01L51/56;H01L27/32 |
主分类号 |
H01L51/50 |
代理机构 |
Greenblum & Bernstein, P.L.C. |
代理人 |
Greenblum & Bernstein, P.L.C. |
主权项 |
1. An organic EL element comprising:
an anode; a cathode; banks; a functional layer between the anode and the cathode, the functional layer including one or more sublayers, the one or more sublayers including a light-emitting sublayer, the light-emitting sublayer defined by the banks and containing an organic material; and a hole injection layer between the anode and the functional layer, wherein the hole injection layer comprises tungsten oxide, tungsten atoms constituting the tungsten oxide include both tungsten atoms with a valence of six and tungsten atoms with a valence less than six, the hole injection layer includes a crystal of the tungsten oxide, a particle diameter of the crystal being on an order of nanometers, the hole injection layer has a surface facing the functional layer and has a recessed structure such that a portion of the surface overlapping with the light-emitting sublayer is located closer to the anode than other portions of the surface overlapping with the banks, the portion of the surface overlapping with the light-emitting sublayer and the other portions of the surface overlapping with the banks are located closer to the anode than a peripheral bottom surface of each of the banks, and the recessed structure comprises (i) an inner bottom surface that is in contact with a bottom surface of the functional layer, and (ii) an inner side surface that is continuous with the inner bottom surface and in contact at least with part of a side surface of the functional layer, and the inner side surface of the recessed structure has a lower edge and an upper edge, the lower edge being continuous with the inner bottom surface, and the upper edge being one of (i) aligned with part of a lower edge of the bank, the part being in contact with the light-emitting layer, and (ii) in contact with a bottom surface of the bank. |
地址 |
Tokyo JP |