TY - JOUR
T1 - Highly efficient tandem white organic light-emitting diodes based upon C 60/NaT4 organic heterojunction as charge generation layer
AU - Chen, Yonghua
AU - Tian, Hongkun
AU - Chen, Jiangshan
AU - Geng, Yanhou
AU - Yan, Donghang
AU - Wang, Lixiang
AU - Ma, Dongge
PY - 2012/5/7
Y1 - 2012/5/7
N2 - We present a high-efficiency tandem white organic light-emitting diode based upon a C 60/5,5′′′-bis(naphth-2-yl)-2, 2′:5′,2′′:5′′,2′′′- quaterthiophene (NaT4) organic heterojunction as a charge generation layer. A maximum current efficiency, maximum power efficiency, and maximum external quantum efficiency of 111.3 cd A -1, 50.5 lm W -1, and 38.7%, respectively, are obtained. More importantly, the efficiency roll-off is greatly improved with only a slight roll-off to109 cd A -1, 40.3 lm W -1, and 38% at a luminance of 1000 cd m -2. Surprisingly, the electroluminescent spectrum is highly stable at all levels of luminance. Furthermore, our tandem device shows better operational stability than a tandem device employing a conventional charge generation layer. It is concluded that the excellent charge generation, transport, and extraction in the C 60/NaT4 organic heterojunction-based CGL is responsible for the high performances.
AB - We present a high-efficiency tandem white organic light-emitting diode based upon a C 60/5,5′′′-bis(naphth-2-yl)-2, 2′:5′,2′′:5′′,2′′′- quaterthiophene (NaT4) organic heterojunction as a charge generation layer. A maximum current efficiency, maximum power efficiency, and maximum external quantum efficiency of 111.3 cd A -1, 50.5 lm W -1, and 38.7%, respectively, are obtained. More importantly, the efficiency roll-off is greatly improved with only a slight roll-off to109 cd A -1, 40.3 lm W -1, and 38% at a luminance of 1000 cd m -2. Surprisingly, the electroluminescent spectrum is highly stable at all levels of luminance. Furthermore, our tandem device shows better operational stability than a tandem device employing a conventional charge generation layer. It is concluded that the excellent charge generation, transport, and extraction in the C 60/NaT4 organic heterojunction-based CGL is responsible for the high performances.
UR - http://www.scopus.com/inward/record.url?scp=84859762854&partnerID=8YFLogxK
U2 - 10.1039/c2jm30557g
DO - 10.1039/c2jm30557g
M3 - 文章
AN - SCOPUS:84859762854
SN - 0959-9428
VL - 22
SP - 8492
EP - 8498
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
IS - 17
ER -