High-Efficiency Phosphorescent and Fluorescent Pure-White Organic Light-Emitting Diodes by Incorporating Small Nano-Dot in Non-emissive Layer

Jwo-Huei JOU  Wei-Ben WANG  Cheng-Chung CHEN  Ming-Hsuan WU  Mao-Feng HSU  Shih-Ming SHEN  Yu-Chiao CHUNG  Jing-Jong SHYUE  

IEICE TRANSACTIONS on Electronics   Vol.E91-C   No.10   pp.1532-1535
Publication Date: 2008/10/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e91-c.10.1532
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Section on Electronic Displays)
OLEDs,  efficiency,  nanodot,  pure-white,  

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High-efficiency pure-white organic light-emitting diodes (OLEDs) were fabricated using small polysilicic acid nanodot embedded polymeric hole-transporting layer. By incorporating the nanodot, the efficiency of a solution-processed phosphorescent white OLED was increased from 6.8 to 23.7 lm/W, an improvement of 250%. 17.1 lm/W was obtained while the same concept was applied on a mixed-host composed fluorescent white OLED.