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13‐2: Remarkable Reduction of Efficiency Roll‐off for Quantum‐dot Light Emitting Diodes by Optimized Shell Layer
Author(s) -
Kim Hyo-Min,
Hwang Eunsa,
Cho Sinyoung,
Jeong Duk Young,
Nam Kyungmok,
Lee Hyeokjae,
Jang Jin
Publication year - 2017
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.11603
Subject(s) - quantum dot , optoelectronics , light emitting diode , diode , materials science , layer (electronics) , shell (structure) , quantum efficiency , reduction (mathematics) , nanotechnology , composite material , geometry , mathematics
We report in this wok the improvement of current efficiency (CE) roll‐off and power efficiency (PE) roll‐off of QLED by shell engineering of quantum‐dots (QDs). The inverted QLEDs using the green QDs (G‐QDs) with optimized shell exhibited the extremely reduced CE roll‐off of 9% at 10,000 cd/m 2 and also 10 times longer lifetime compared with the QLED with conventional G‐QDs.