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Proceedings Paper

The application of high efficient yellow phosphorescent material to white OLEDs
Author(s): Jin-Sheng Lin; Chun-Neng Ku; Pang-Chi Huang; Cheng-An Wu; Meng-Hao Chang; Jia-Lun Liou; Mei-Rurng Tseng
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Paper Abstract

A new type of thiopyridinyl-based iridium molecule (POT) was used as the yellow phosphorescent material in our research. On fabricating a yellow PHOLED by doping POT-02 with host as the emitter, the device achieved a high power efficiency of 66.0 lm/W and an external quantum efficiency of 23.2%. On the other hand, a white organic lightemitting diode (WOLED) with a high power efficiency has been demonstrated by dispersing a host-free, yellow phosphorescent material in-between double blue phosphorescent emitters. In this study, we introduce a simple process for generating yellow emission of a WOLED by using the B/Y/B EML configuration. The B/Y/B EML configuration can achieve a higher efficiency and a smaller color shift with various operational brightness values. Based on the concept of this device, the molecular engineering of the blue phosphorescent host material as well as the light-extraction film, a WOLED with a power efficiency of 103 lm/W and an external quantum efficiency of 38.2% at a practical brightness of 1000 cd/m2 with CIE coordinates (CIEx, y) of (0.36, 0.48) can be achieved.

Paper Details

Date Published: 8 October 2014
PDF: 6 pages
Proc. SPIE 9183, Organic Light Emitting Materials and Devices XVIII, 91831O (8 October 2014); doi: 10.1117/12.2060344
Show Author Affiliations
Jin-Sheng Lin, Industrial Technology Research Institute (Taiwan)
Chun-Neng Ku, Industrial Technology Research Institute (Taiwan)
Pang-Chi Huang, Industrial Technology Research Institute (Taiwan)
Cheng-An Wu, Industrial Technology Research Institute (Taiwan)
Meng-Hao Chang, Industrial Technology Research Institute (Taiwan)
Jia-Lun Liou, Industrial Technology Research Institute (Taiwan)
Mei-Rurng Tseng, Industrial Technology Research Institute (Taiwan)

Published in SPIE Proceedings Vol. 9183:
Organic Light Emitting Materials and Devices XVIII
Franky So; Chihaya Adachi, Editor(s)

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