油酸石蜡体系中红光CdSe量子点的合成及其r高显色指数白光LED制备

摘要

Semiconductor quantum dots have a unique property of quantum size confinement, the band gap of semiconductor increased with the size decreasing.In the oleic acid and paraffin liquid greener synthesis system, the size of CdSe quantum dots can be controlled by surfactant oleylamine.Larger diameter CdSe quantum dots can be acquired with oleylamine adding, and then the range of emitting spectra can reach red region with emission peak at 630 nm.Stable light convert material can be acquired by coating red quantum dots with SiO2 .High color rendering( Ra=90) white LED was fabricated by packaging blue LED chip with yellow phosphor and red quantum dots.%半导体量子点具有量子尺寸效应,其半导体带隙随着量子点尺寸的减小而增大.在油酸石蜡绿色合成体系中通过引入表面活性剂油胺来调控CdSe量子点尺寸.加入油胺可得到大粒径的CdSe量子点,其发光光谱范围可以扩展到红光区域,得到发射波长为630 nm的量子点.对红光量子点进行二氧化硅包覆得到稳定的光转换材料,并与蓝光LED芯片以及黄光荧光粉进行封装得到显色指数Ra为90的高显色指数白光LED器件.