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Highly efficient polymer phosphorescent light-emitting devices based on a new polyfluorene derivative as host 下载免费PDF全文
Several highly efficient iridium-complex polymer light-emitting devices (PLEDs) are fabricated,with a newly synthesized blue conjugated polymer,poly[(9,9-bis(4-(2-ethylhexyloxy)phenyl)-fluorene)-co-(3,7-dibenziothiene-S,S-dioxide15)] (PPF-3,7SO15),chosen as host.High luminous efficiencies of 7.4 cd·A 1 and 27.4 cd·A 1 are achieved in red and green PLEDs,respectively,by optimizing the doping concentrations of red phosphorescent dye iridium bis(1-phenylisoquinoline) (acetylacetonate) (Ir(piq)) and green phosphorescent dye iridium tris(2-(4-tolyl)pyridinato-N,C 2) (Ir(mppy) 3).Furthermore,highly efficient white PLEDs (WPLEDs) with the Commission Internationale de l’Eclairage (CIE) coordinates of (0.35,0.38) are successfully produced by carefully controlling the doping concentration of the irid-ium complex.The obtained WPLEDs show maximal efficiencies of 14.4 cd·A 1 and 10.1 lm·W 1,which are comparable to those of incandescent bulbs.Moreover,the electroluminescent spectrum of the white device with an initial luminance of about 1000 cd·m 2 is stable,subject to constant applied current stress,indicating that good device stability can be obtained in this system. 相似文献
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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(40 nm)/发光
关键词:
聚合物发光二极管
白光
二元互补色
离子型铱配合物 相似文献
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制备了一种基于荧光聚合物共混的单发光层聚合物白光发光二极管.器件结构为铟锡氧化物/苯磺酸掺杂聚乙烯基二氧噻吩/发光层/ 1,3,5-三(N-苯基-2-苯并咪唑-2)苯41/Ba/Al,蓝光材料芴-氟化喹喔啉共聚物(PF-BPFQ5)、绿光材料苯基取代的聚对苯乙炔(P-PPV)和红光材料聚(2-甲氧基-5-(2′-乙基己氧基)-1,4-对苯乙炔)(MEH-PPV)共混为发光层.当PF-BPFQ5,P-PPV,MEH-PPV的质量比例为100∶06∶06时,获得标准的白光,色坐标为(033
关键词:
聚合物发光二极管
白光
共混 相似文献
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