新型有机光电开关器件

结合有机发光和光电二极管器件，制作了一种新型的有机光电开关器件。器件结构为：ITO／NPB／Alq3／CuPc／C60／NPB／Alq3／LiF／Al。其中，ITO(indium tin oxide，氧化铟锡)为正极，NPBN，N′-di(naphthaleneyl)N，N′-diphenylbenzidine]／Alq3tris-(8-hydro--xyquinoline，8-羟基喹啉铝)aluminum]作为电致发光层，CuPc(Copper Phthalocyanine，酞菁铜)／C60为光电转换层，LiF／Al为器件负极。即两个电致发光层和一个光电转换层组成的三明治型结构。从低向高施加电压和从高向低施加电压时，该器件呈现出不同的电流密度-电压(J-V)和功率密度-电压(P-V)曲线，即器件在相同的电压下可得到不同的电流密度值和功率密度值(亮度值)，利用高亮度状态(ON)到低亮度状态(OFF)的转变，可实现开关型有机电致发光器件。器件的光电转换层吸收效率为0．153％。

Organic Optoelectronic Device with Switchable Character

A new type of organic electro-optic device combining an organic light emitting diode with an organic photovoltaic cell is studied. The structure is ITO/NPB/Alq_3/CuPc/C_(60)/NPB/Alq_3/LiF/Al. NPB/Alq_3 functions as the light-emitting layer; meanwhile CuPc/C_(60) functions as a photonic/electric energy transfer cell. The device presents different current density-voltage and power density-voltage curves when in the forward voltage scan then in the backward voltage scan. These transition from a high (ON) to low (OFF) luminance renders a prototype to realize a switchable organic electroluminescence. The conversion efficiency of the optioelectric layer is 0.153%. Several methods to improve the conversion efficiency are also discussed.