Premium
72‐4: Spectrum Narrowing and Efficiency Enhancement of Quantum Dot Light‐Emitting Diodes by Microcavity
Author(s) -
Shihao Ding,
Rui Cai,
Xiangtian Xiao,
Zhenghui Wu,
Bing Xu,
Kai Wang,
Wei Sun Xiao
Publication year - 2020
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.14062
Subject(s) - optoelectronics , distributed bragg reflector , electroluminescence , full width at half maximum , quantum dot , gamut , quantum efficiency , light emitting diode , diode , materials science , optics , reflector (photography) , luminance , physics , light source , wavelength , layer (electronics) , composite material
We have studied the spectrum narrowing of a microcavity quantum dot light‐emitting diodes (MQLEDs), and observed enhancement in external quantum efficiency and luminance. Our results show that the full width at half maximum (FWHM) of electroluminescent is reduced by one‐third using a distributed bragg reflector (DBR) and metal mirror to form a Fabry‐Perot cavity. The narrowed spectrum also contributes to an ultrawide color gamut. In addition, the resonant cavity improves the light coupling efficiency of the devices, which exhibits a twenty percent enhancement of the external quantum efficiency.