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65‐7: Student Paper: Cd‐Free Quantum‐Dot Light‐Emitting Diode with a Mixed Single Layer to improve the Flatness of Current Efficiency
Author(s) -
Biswas Mohammad Mostafizur Rahman,
Okada Hiroyuki
Publication year - 2021
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.14850
Subject(s) - quantum dot , flatness (cosmology) , mixing (physics) , light emitting diode , diode , optoelectronics , current (fluid) , constant current , materials science , quantum efficiency , electron , physics , cosmology , quantum mechanics , thermodynamics
The performance of the Cd‐free quantum‐dot light emitting diode (QLED) was investigated by mixing the hole and electron transport materials with the emission layer. With an optimized mixing ratio of the hole transport and electron transport materials, the current efficiency of 4.2 cd/A and EQE of 2.2% was achieved using the ZnCuInS/ZnS‐based QLED at yellow emission. Additionally, after optimizing the mixing ratios, the carrier injection is balanced, so the current efficiency is constant for wide current densities.