High-Efficiency Nondoped Deep-Blue-Emitting Organic Electroluminescent Device

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• 作者：Silu Tao ; Yechun Zhou ; Chun-Sing Lee ; Xiaohong Zhang ; Shuit-Tong Lee
• 刊名：Chemistry of Materials
• 出版年：2010
• 出版时间：March 23, 2010
• 年：2010
• 卷：22
• 期：6
• 页码：2138-2141
• 全文大小：718K
• 年卷期：v.22,no.6(March 23, 2010)
• ISSN：1520-5002

文摘

A new blue emitter, 9,9-bis-(3- (9-phenyl-carbazoyl))-2,7-dipyrenylfluorene (DCDPF), has been synthesized and characterized. Organic light-emitting devices (OLEDs) using DCDPF as a nondoped emitter exhibits deep-blue emission with a peak at 458 nm and CIE coordinates of (0.15, 0.15). The maximum efficiency of the device is 4.4 cd/A (3.1 lm/W). The results suggest that the introduction of carbazole units at the 9-position of fluorene provides an effective way to suppress molecular aggregation which would cause red shift in emission.