Open AccessWhite electroluminescent devices based on hybrid structure with quantum dot color convertors
Author(s) -
Dan Zhao,
Jun Qian,
Shuangli Ye,
Ying Li,
Jiawei Wang
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.382220
Subject(s) - quantum dot , electroluminescence , optoelectronics , luminance , high color , materials science , optics , white light , color rendering index , light emitting diode , physics , computer science , nanotechnology , color image , image processing , image (mathematics) , layer (electronics) , artificial intelligence
In this work, a hybrid structure of white electroluminescent (EL) devices has been designed. CdSe/ZnS core-shell quantum dots (QDs) are introduced as color convertors. The photometric and colorimetric characteristics of this device are further experimentally investigated with varying frequency and voltage. Compared with that of conventional white EL devices, this novel device achieves a twice luminance and more stable white light. Moreover, the concept of "color conversion index" is proposed to measure the color conversion ability of QDs in EL devices in consideration of human visual effect.