含二唑的聚(间亚苯乙烯)电致发光二极管

HETEROCYCLE SUBSTITUTED POLY(m- PHENYLENEVINYLENE) FOR LIGHT EMITTING DEVICES

含二唑的聚（间亚苯乙烯）电致发光二极管印寿根李晨曦黄文强何炳林（南开大学吸附分离功能高分子材料国家重点实验室高分子化学研究所天津３０００７１）彭俊彪刘星元李文连（中国科学院长春物理研究所长春１３００２１）关键词电致发光，光电子能谱，聚（间亚苯...

Results are presented which include the synthesis, characteriation and electroluminescence performance of a new type of conjugated polymer, poly(2,5 diphenyl 1,3,4 oxadiazolyl) 3,3' vinylene(M PPV). In order to synthesize compound (A), two reaction routines were chosen, but experimental result showed that routine(1) was much more promising than that of routine(2). A light emitting diode with the structure of ITO/M PPV(80nm)/A1(150nm) is driven at about 6V and has a peak emission wavelength of 470nm, while the LED constructd using PPV(ITO/PPV/A1) emitted yellow light. The most likely explanation to the difference is that a decrease in the conjugation length of the heterocycle substituted PPV(M PPV) increases the band gap to values higher than that of PPV, resulting in a blue shift in the emission spectrum and this is in agreement with the result determined by XPS technique.