Extremely efficient indium-tin-oxide-free green phosphorescent organic light-emitting diodes.
This paper demonstrates extremely efficient (η(P,max)  = 118 lm W(-1) ) ITO-free green phosphorescent OLEDs (PHOLEDs) with multilayered, highly conductive poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) films as the anode. The efficiency is obtained without any outcoupling-enhancing structures and is 44% higher than the 82 lm W(-1)  of similar optimized ITO-anode PHOLEDs. Detailed simulations show that this improvement is due largely to the intrinsically enhanced outcoupling that results from a weak microcavity effect.
Ames Laboratory-USDOE and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.
Min
M
Cai
Zhuo
Z
Ye
Teng
T
Xiao
Rui
R
Liu
Ying
Y
Chen
Robert W
RW
Mayer
Rana
R
Biswas
Kai-Ming
KM
Ho
Ruth
R
Shinar
Joseph
J
Shinar
D004566:Electrodes; D049408:Luminescent Agents / Q000737:chemistry; D011137:Polystyrenes / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013876:Thiophenes / Q000737:chemistry; D017971:Tin Compounds / Q000737:chemistry*
D049408:Luminescent Agents; D011137:Polystyrenes; D012997:Solvents; D013876:Thiophenes; D017971:Tin Compounds; C533756:poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate); C109984:indium tin oxide