Premium
White organic light‐emitting diodes based on C545T doped emitting system
Author(s) -
Lin HuaPing,
Zhou Fan,
Li Jun,
Zhang XiaoWen,
Zhang Liang,
Jiang XueYin,
Zhang ZhiLin,
Zhang JianHua
Publication year - 2012
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127520
Subject(s) - electroluminescence , luminance , oled , optoelectronics , diode , materials science , doping , white light , luminous efficacy , energy transfer , fluorescence , optics , layer (electronics) , physics , engineering physics , nanotechnology
Fluorescent white organic light‐emitting diodes (WOLEDs) with single‐emitting layer (EML) and double‐EML structures were demonstrated using a 2,3,6,7‐tetrahydro‐1,1,7,7,‐tetramethyl‐1H,5H,11H‐10(2‐benzothiazolyl)quinolizine‐[9,9a,1gh]coumarin (C545T) doped emitting system. With the incorporation of double‐EML structure, white emission with Commission Internationale de L'Eclairage (CIE) color coordinates of (0.331, 0.335) and luminous efficiency of 8.04 cd/A was obtained. Moreover, WOLED with a single‐EML structure shows superior electroluminescence performances such as lower voltage, higher luminance, and enhanced power efficiency. These improvements are attributed to its high energy transfer ability via the intermediation of C545T. The Forster's radius was given to clarify the actual energy transfer process.