首页> 中文期刊> 《物理学报》 >掺杂离子型配合物的高效聚合物白光发光二极管

掺杂离子型配合物的高效聚合物白光发光二极管

         

摘要

A series of white polymer light-emitting diodes (WPLEDs) each with a single emitting layer using ionic iridium complex is fabricated.The white light is obtained via two complementary colors of orange light emitter ionic iridium complexe [(npy)2Ir(c-phen)]PF6 (Hnpy:2-(naphthalen-1-yl)pyridine,c-phen:1-ethyl-2-(9-(2-ethylhexyl)-9H-carbazol-3-yl)-1H-imidazo[4,5-f][1,10]phenanthroline) and sky-blue light emitter Firpic (iridium bis(2-(4,6-difluorophenyl)-pyridinato-N,C(2)) picolinate.The emtting layer consists of poly(N-vinylcarbzole) (PVK) as host polymer,1,3-bis[(4-tert-butylphenyl)-1,3,4-oxadiazoly]-phenylene (OXD-7) as electron-transporting materials,Firpic and [(npy)2Ir(c-phen)]PF6.The structure of the WPLED is indium-tin-oxide/poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate)(40 nm)/emtting layer (80 nm)/CsF(1.5 nm)/Al(120 nm).When the mass ratio of PVK,OXD-7,Firpic,[(npy)2Ir(c-phen)]PF6 is 67∶23∶10∶0.25,the most efficient white light is obtained with a color coordinate of (0.31,0.40),a maximal luminance efficiency of 13.3 cd/A and a maximal luminance of 6032 cd/m2.Meanwhile,the color coordinate is unchanged with current density.The mechanism of the WPLED is discussed.%研究了掺杂离子型铱配合物的单发光层聚合物白光器件.根据二元互补色获得白光的原理,所采用离子型橙光材料为六氟磷酸合[二(2-(萘基-1-基)吡啶)(1-乙基-2-(9-(2-乙基己基)-9H-咔唑-3-基)-1H-咪唑并[4,5-f][1,10]菲啰啉)铱(Ⅲ)]([(npy)2Ir(c-phen)]PF6),天蓝光材料为二(2-(4,6-二氟苯基)吡啶-N,C(2))吡啶甲酰合铱(Firpic).器件结构为氧化铟锡/苯磺酸掺杂聚乙烯基二氧噻吩(40nm)/发光层(80nm)/CsF(1.5nm)/Al(1

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