An efficient hole-transporting blue fluorophore 3,6-dipyrenyl-9-ethylcarbazole for undoped organic light-emitting devices

详细信息	查看全文 | 推荐本文 |

• 作者：Qing-Xiao Tong^a ; ^{qxtong@gmail.com} ; Shiu-Lun Lai^b ; Ming-Fai Lo^b ; Mei-Yee Chan^c ; Tsz-Wai Ng^b ; Shuit-Tong Lee^b ; Si-Lu Tao^d ; Chun-Sing Lee^b ; ^{apcslee@cityu.edu.hk}
• 关键词：Carbazole ; OLED ; Blue ; Fluorescence ; Undoped
• 刊名：Synthetic Metals
• 出版年：2012
• 期刊代码：77_03796779
• 类别：ph
• 出版时间：April, 2012
• 卷：162
• 期：5-6
• 页码：415-418
• 文件大小：437 K

摘要

A new blue-emitting carbazole derivative, 3,6-dipyrenyl-9-ethylcarbazole (DPEC), has been designed and synthesized for applications in organic light-emitting devices (OLEDs). Undoped DPEC-based OLEDs give a saturated blue electroluminescence with Commission Internationale de L鈥橢clairage 1931 coordinates of (0.15, 0.18), and possess high luminous efficiency of 4.75 cd A^鈭?. On the other hand, DPEC can also function as a hole-transporting layer (HTL). In particular, by replacing N,N鈥?diphenyl-1,1鈥?biphenyl-4,4鈥?diamine (NPB) as HTL, a simplified bilayer device demonstrated good performance, comparable to that of the trilayer device. This good device performance illustrates that DPEC is a promising candidate as a blue hole-transporting emitter.