聚芴
材料科学
磷光
氧化铟锡
发光效率
阴极
电致发光
有机发光二极管
芴
佩多:嘘
铱
色度
二极管
光电子学
图层(电子)
光化学
聚合物
光学
纳米技术
荧光
有机化学
复合材料
物理化学
化学
催化作用
物理
作者
Kai Zhang,Chengmei Zhong,Shengjian Liu,Aihui Liang,Shengyi Dong,Fei Huang
摘要
Highly efficient inverted white organic light emitting diodes (IWOLEDs) were achieved by a simple solution processing technique, in which cross-linkable amino-functionalized polyfluorene poly[9,9-bis(6′-(N,N-diethylamino)hexyl)-fluorene-alt-9,9-bis(3-ethyl(oxetane-3-ethyoxy)-hexyl)-fluorene] (PFN-OX) served as electron injection/transporting layer (EIL) deposited onto indium tin oxide (ITO) directly without n-type inorganic metal oxides (MOs). The light emitting layer consisted of a (poly(N-vinylcarbazole) (PVK)/1,3-bis[(4-tert-butylphenyl)-1,3,4-oxadiazolyl]phenylene (OXD-7) blend as host and phosphorescent iridium complexes as guests. Our results demonstrated that ITO could serve as cathode and inject electrons into the phosphorescent system directly and efficiently by using PFN-OX as single EIL. As a result, a high performance IWOLED device with Commission Internationale de L'Eclairage (CIE) coordinate of (0.35, 0.45), colour rendering index (CRI) of 70, maximum luminous efficiency (LE) of 18.1 cd A−1 and maximum power efficiency (PE) of 6.6 lm W−1 was achieved. This result provides an easy way of fabricating multilayer solution processed high efficiency IWOLEDs.
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