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Proceedings Paper

An electron transporting blue emitter for OLED
Author(s): Boyuan Qi; Jiaxiu Luo; Suyue Li; Lixin Xiao; Wenfang Sun; Zhijian Chen; Bo Qu; Qihuang Gong
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Paper Abstract

After the premier commercialization of OLED in 1997, OLED has been considered as the candidate for the next generation of flat panel display. In comparison to liquid crystal display (LCD) and plasma display panel (PDP), OLED exhibits promising merits for display, e.g., flexible, printable, micro-buildable and multiple designable. Although many efforts have been made on electroluminescent (EL) materials and devices, obtaining highly efficient and pure blue light is still a great challenge. In order to improve the emission efficiency and purity of the blue emission, a new bipolar blue light emitter, 2,7-di(2,2′:6′,2"-terpyridine)- 2,7-diethynyl-9,9-dioctyl-9H-fluorene (TPEF), was designed and synthesized. A blue OLED was obtained with the configuration of ITO/PEDOT/PVK:CBP:TPEF/LiF/Al. The device exhibits a turn-on voltage of 9 V and a maximum brightness of 12 cd/m2 at 15 V. The device gives a deep blue emission located at 420 nm with the Commission Internationale de l'Eclairage (CIE) coordinates of (0.17, 0.10). We also use TPEF as electron transporting material in the device of ITO/PPV/TPEF/LiF/Al, the turn-on voltage is 3 V. It is proved the current in the device was enhanced indeed by using the new material.

Paper Details

Date Published: 15 November 2010
PDF: 4 pages
Proc. SPIE 7852, LED and Display Technologies, 78520M (15 November 2010); doi: 10.1117/12.870341
Show Author Affiliations
Boyuan Qi, Peking Univ. (China)
Jiaxiu Luo, Peking Univ. (China)
Suyue Li, North Dakota State Univ. (United States)
Lixin Xiao, Peking Univ. (China)
Wenfang Sun, North Dakota State Univ. (United States)
Zhijian Chen, Peking Univ. (China)
Bo Qu, Peking Univ. (China)
Qihuang Gong, Peking Univ. (China)

Published in SPIE Proceedings Vol. 7852:
LED and Display Technologies
Gang Yu; Yanbing Hou, Editor(s)

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