Synthesis of CdSe/CdS Core/Shell Quantum Dots Luminescent Microspheres and Their Application for WLEDs

AN Na; LU Rui; MA Hao-yue; YANG Lei; HAO Jun-jie; BIAN Dun

doi:10.3788/fgxb20173808.1003

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Synthesis of CdSe/CdS Core/Shell Quantum Dots Luminescent Microspheres and Their Application for WLEDs

更新时间：2020-08-12

- Synthesis of CdSe/CdS Core/Shell Quantum Dots Luminescent Microspheres and Their Application for WLEDs
- Chinese Journal of Luminescence Vol. 38, Issue 8, Pages: 1003-1009(2017)
- 作者机构：
  
  1. 天津市中环量子科技有限公司天津,300385
  2. 南方科技大学电子与电气工程系,广东深圳,518055
- 作者简介：
- 基金信息：
  
  Supported by Tianjin New Materials Science and Technology Major Projects(16ZXCLGX000
- DOI：10.3788/fgxb20173808.1003
  CLC： TP394.1;O482.31
- Received：30 December 2016，
  
  Revised：02 March 2017，
  
  Published：05 August 2017
- 稿件说明：
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安娜, 卢睿, 马昊玥等. 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

AN Na, LU Rui, MA Hao-yue etc. Synthesis of CdSe/CdS Core/Shell Quantum Dots Luminescent Microspheres and Their Application for WLEDs[J]. Chinese Journal of Luminescence, 2017,38(8): 1003-1009
安娜, 卢睿, 马昊玥等. 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 DOI： 10.3788/fgxb20173808.1003.

AN Na, LU Rui, MA Hao-yue etc. Synthesis of CdSe/CdS Core/Shell Quantum Dots Luminescent Microspheres and Their Application for WLEDs[J]. Chinese Journal of Luminescence, 2017,38(8): 1003-1009 DOI： 10.3788/fgxb20173808.1003.

摘要

采用有机化学合成法，利用正三辛基膦（TOP）辅助的快速注入生长方法，改进传统的制备工艺，实现了CdSe/CdS厚壳层核壳（8.6 ML）量子点复合材料的合成制备，并对所合成的核、核壳量子点及其复合材料的晶格结构、形貌特点与发光性质进行了XRD、TEM、SEM、UV-Vis、PL表征和红光补偿效果测试。测试结果表明，CdSe核具有立方纤锌矿晶格结构；CdSe/CdS量子点复合材料直径为45~75 m，呈菱形规则形貌，且颗粒分散性良好。采用该方法，可以提高量子产率，产率由4%（CdSe核）升至48%（CdSe/CdS核壳量子点）；可以增强激子态发光能力，CdSe/CdS核壳量子点复合材料的荧光强度约为CdSe核的13倍。将该材料与YAG：Ce

黄色荧光粉组合应用，获得了高光效（148.29 lm/W）、高显色指数（Ra为90.1，R9为97.0）的白光发光二级管，表明按照上述方法获得的CdSe/CdS核壳量子点复合材料在白光发光二极管中深红光波段具有较好的补偿效果。

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 m 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:Ce

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

Keywords

references

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