Highly efficient undoped deep-blue electroluminescent device based on a novel pyrene derivative

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• 作者：Zhiqiang Wang ; Chen Xu ; Weizhou Wang ; Weijun Fu ; Lianbin Niu ; Baoming Ji
• 关键词：Pyrene derivative ; Deep-blue emission ; Organic light emitting diodes ; Electronic structure
• 刊名：Solid-State Electronics
• 出版年：2010
• 出版时间：May 2010
• 年：2010
• 卷：54
• 期：5
• 页码：524-526
• 全文大小：346 K

文摘

A novel pyrene derivative 1,6-bis(9,9-dimethylfluorenyl)pyrene (DFP) was synthesized and characterized by ¹H NMR spectrum, high resolution mass spectrum and elemental analysis. DFP exhibits bright blue emission both in solution and in solid thin film. Theoretical calculations show that the material has a non-coplanar structure and a high HOMO energy level. The undoped device based on DFP shows a stable deep-blue emission at 456 nm under different voltage (up to 10 V). The 1931 CIE coordinates (x = 0.15, y = 0.12) of the device are very close to the National Television Standards Committee’s (NTSC) blue standard. The device achieves a maximum external quantum efficiency of 4.3 % (current efficiency of 3.06 cd A⁻¹) at 19.8 mA cm⁻² with a luminance of 607 cd m⁻².