发光学报2017，Vol.38Issue(8)：1003-1009,7.DOI:10.3788/fgxb20173808.1003
CdSe/CdS核壳量子点复合材料合成及其在白光发光二极管中的应用
Synthesis of CdSe/CdS Core/Shell Quantum Dots Luminescent Microspheres and Their Application for WLEDs
摘要
Abstract
By adopting three trioctylphosphine (TOP) assisted rapid injection growth method,and combining a composite material for fluorescent quantum dot micro-nano packaging, CdSe/CdS core-shell quantum dots luminescent microspheres (LMS) with thick shell(8.6 ML)were synthesized.It is an organic-synthesis method.The lattice structure, morphology composition and optical properties of the as-prepared, core-shell quantum dots and LMS were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), UV-Vis absorption, photo-luminescence spectrum (PL) and red-light compensation test, respectively.The obtained CdSe core has a cubic phase zinc blend structure.The diameters of LMS are about 45-75 μm with diamond rules of morphology, and the particles disperse in order.The method aforementioned can improve the quantum yield.The quantum yield is improved from 4% (CdSe core) to 48% (CdSe/CdS core-shell quantum-dots).Besides, the luminous power of exciton-states is enhanced, and the fluorescence intensity of CdSe/CdS core-shell quantum-dots is about 13 times larger than that of CdSe core.By applying the LMS and YAG∶Ce3+ yellow phosphor combination, the white light-emitting diode (WLED) with high efficiency (148.29 lm/W) and high color rendering index (Ra is 90.1, R9 is 97.0) are obtained.The results indicate that the LMS have good compensation effect for the deep-red-light-band.关键词
量子点复合材料/白光发光二极管(WLED)/显色指数/CdSe/CdSKey words
LMS/white light-emitting diode(WLED)/color rendering index/CdSe/CdS分类
数理科学引用本文复制引用
安娜,卢睿,马昊玥,杨磊,郝俊杰,边盾..CdSe/CdS核壳量子点复合材料合成及其在白光发光二极管中的应用[J].发光学报,2017,38(8):1003-1009,7.基金项目
天津市新材料科技重大专项(16ZXCLGX00040)资助项目 Supported by Tianjin New Materials Science and Technology Major Projects(16ZXCLGX00040) （16ZXCLGX00040）
