Effect of Red, Green CdSe@ZnS Quantum Dots Ratios on Standard Three-band White LED Devices

CHEN Yun-han; ZHANG Xue; ZHOU Jie; CAO Jin; ZHANG Jian-hua; YIN Lu-qiao; ZHU Wen-qing

doi:10.3788/fgxb20143508.0992

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Effect of Red, Green CdSe@ZnS Quantum Dots Ratios on Standard Three-band White LED Devices

更新时间：2020-08-12

- Effect of Red, Green CdSe@ZnS Quantum Dots Ratios on Standard Three-band White LED Devices
- Chinese Journal of Luminescence Vol. 35, Issue 8, Pages: 992-997(2014)
- 作者机构：
  
  1. 上海大学材料科学与工程学院上海,200444
  2. 上海大学新型显示技术及应用集成教育部重点实验室上海,200072
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20143508.0992
  CLC： TN383+.2
- Received：04 May 2014，
  
  Revised：15 June 2014，
  
  Published：03 August 2014
- 稿件说明：
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陈赟汉, 张雪, 周洁等. 红、绿CdSe@ZnS量子点配比对三波段标准白光LED器件的影响[J]. 发光学报, 2014,35(8): 992-997

CHEN Yun-han, ZHANG Xue, ZHOU Jie etc. Effect of Red, Green CdSe@ZnS Quantum Dots Ratios on Standard Three-band White LED Devices[J]. Chinese Journal of Luminescence, 2014,35(8): 992-997
陈赟汉, 张雪, 周洁等. 红、绿CdSe@ZnS量子点配比对三波段标准白光LED器件的影响[J]. 发光学报, 2014,35(8): 992-997 DOI： 10.3788/fgxb20143508.0992.

CHEN Yun-han, ZHANG Xue, ZHOU Jie etc. Effect of Red, Green CdSe@ZnS Quantum Dots Ratios on Standard Three-band White LED Devices[J]. Chinese Journal of Luminescence, 2014,35(8): 992-997 DOI： 10.3788/fgxb20143508.0992.

摘要

将一步法合成的具有梯度合金结构的红光、绿光CdSe@ZnS量子点与硅胶均匀混合后，作为光转换层涂覆到蓝色InGaN LED芯片上，制备了不含荧光材料的三波段白光LED器件。研究了峰值为650 nm和550 nm的高效率红、绿量子点在硅胶中的含量及配比对白光LED色坐标以及效率的影响。结果表明，当红、绿量子点配比为2：3时，可得到发射纯正白光的QDs-LED器件，色坐标为（0.322 8，0.335 9）、色温为5 725 K，功率效率为26.61 lm/W，显色指数为72.7。光谱中红、蓝、绿三色发光峰的半高宽分别为30，25，38 nm，表明器件具有很好的单色性和高色纯度。

Abstract

Highly-fluorescent green and red CdSe/ZnS core/shell gradient alloy quantum dots (QDs) were synthesized by one-step method. The phosphine-free three-band white light LEDs were fabricated by directly incorporating QDs/epoxy composites with blue InGaN chip. The influences of the content and proportion of red (650 nm) and green (550 nm) QDs on the color coordinate and efficiency of white LED were researched. When the red/green QDs ratio is 2:3

the standard three-band RGB QDs-WLED can be achieved with a CIE-1931 color coordinates of (0.322 8

0.335 9)

CCT of 5 725 K

CRI of 72.7

and power efficiency of 26.61 lm/W. FWHM of the red

blue

and green peak of the white QDs-LED is 30

and 38 nm

respectively.

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references

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