Highly directional emission via coupled surface-plasmon tunneling from electroluminescence in organic light-emitting devices
Highly directional emission via coupled surface-plasmon tunneling from electroluminescence in organic light-emitting devices
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DOI：
10.1063/1.2142085
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发表时间：
2005-12-12
影响因子：
4
通讯作者：
Kawata, S
中科院分区：
文献类型：
--
作者：
Feng, J;Okamoto, T;Kawata, S
报道了以二维周期性波纹银膜为阴极，以发射光谱带宽较窄的有机染料为发光材料，实现了顶部发射有机电致发光器件（TEOLED）的高方向性电致发光。表面等离子体激元在银膜界面上的共振激发有助于光通过银阴极的传输和定向发射。具有铕络合物作为发射层的TEOLED显示出小于4度的光束发散度，并且光束方向由铕络合物的周期性控制。(c)2005年美国物理学会。
We report that highly directional electroluminescence from top-emitting organic light-emitting devices (TEOLEDs) can be achieved by using a two-dimensionally periodically corrugated silver film as a cathode and an organic dye with a narrow bandwidth of emission spectrum as an emitting material. The resonant excitation of surface plasmons on the silver film interfaces contributes to the light transmission through the silver cathode and to the directional emission. The TEOLEDs with a europium complex as an emissive layer show beam divergence of less than 4 degrees and the beam direction is controlled by periodicity of the corrugation. (c) 2005 American Institute of Physics.