复合橙红色量子点在白光发光二极管应用中的颜色补偿效应研究

Study on the Color Compensation Effect of Composite Orange-Red Quantum Dots in WLED Application.

作者信息

Hu Xiaoyue, Xie Yangyang, Geng Chong, Xu Shu, Bi Wengang

机构信息

Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin, 300401, People's Republic of China.

出版信息

Nanoscale Res Lett. 2020 May 24;15(1):118. doi: 10.1186/s11671-020-03350-9.

DOI:10.1186/s11671-020-03350-9

PMID:32449132

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7246285/

Abstract

Quantum dots (QDs) as emerging light-converting materials show the advantage of enhancing color quality of white light-emitting diode (WLED). However, WLEDs employing narrow-emitting monochromic QDs usually present unsatisfactory color rendering in the orange region. Herein, composite orange-red QDs (composite-QDs) are developed through mixing CdSe/ZnS-based orange QDs (O-QDs) and red QDs (R-QDs) to compensate the orange-red light for WLEDs. We investigated the effect of self-absorption and fluorescence resonance energy transfer (FRET) process in composite-QDs on the spectral controllability and fluorescent quenching in WLEDs. The concentration and donor/acceptor ratios were also taken into account to analyze the FRET efficiency and help identify suitable composite-QDs for color compensation in the orange-red light region. As the result, the optimized composite-QDs effectively improve the color rendering index of the WLED compared with monochromatic QDs.

摘要

量子点（QDs）作为新兴的光转换材料，展现出提升白光发光二极管（WLED）颜色质量的优势。然而，采用窄发射单色量子点的白光发光二极管在橙色区域通常呈现出不尽人意的显色性。在此，通过混合基于CdSe/ZnS的橙色量子点（O-QDs）和红色量子点（R-QDs）来开发复合橙红色量子点（复合量子点），以补偿白光发光二极管的橙红色光。我们研究了复合量子点中的自吸收和荧光共振能量转移（FRET）过程对白光发光二极管光谱可控性和荧光猝灭的影响。还考虑了浓度和供体/受体比例，以分析FRET效率，并有助于确定适用于橙红色光区域颜色补偿的复合量子点。结果表明，与单色量子点相比，优化后的复合量子点有效地提高了白光发光二极管的显色指数。