High efficiency phosphorescent organic light emitting diodes using triplet quantum well structure
Author(s) -
Sung Hyun Kim,
Jyongsik Jang,
JaeMin Hong,
Jun Yeob Lee
Publication year - 2007
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.2731435
Subject(s) - phosphorescence , phosphorescent organic light emitting diode , optoelectronics , quantum efficiency , oled , materials science , quantum well , exciton , band gap , wide bandgap semiconductor , diode , electronic band structure , layer (electronics) , optics , physics , nanotechnology , condensed matter physics , fluorescence , laser
Light emission in phosphorescent quantum well structure which can confine excitons within an emitting layer was investigated. A multilayer quantum well structure which has a narrow triplet band gap host material sandwiched between wide triplet band gap host materials was designed, and device performances were studied. The multilayer emitting structure gave high efficiency of 47cd∕A compared with 11cd∕A of standard green devices.
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