Colorimetric Study of Annealing Effect on Fluorescence Performance of CdSe Quantum Dots

HU Lian; WU Hui-zhen

doi:10.3788/fgxb20153606.0610

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Colorimetric Study of Annealing Effect on Fluorescence Performance of CdSe Quantum Dots

更新时间：2020-08-12

- Colorimetric Study of Annealing Effect on Fluorescence Performance of CdSe Quantum Dots
- Chinese Journal of Luminescence Vol. 36, Issue 6, Pages: 610-616(2015)
- 作者机构：
  
  1. 浙江大学物理系,310027
  2. 江南大学理学院,江苏无锡,中国,214122
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20153606.0610
  CLC： O482.31
- Received：24 March 2015，
  
  Revised：10 April 2015，
  
  Published Online：21 April 2015，
  
  Published：03 June 2015
- 稿件说明：
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胡炼, 吴惠桢,. 退火对CdSe量子点荧光影响的色度学研究[J]. 发光学报, 2015,36(6): 610-616

HU Lian, WU Hui-zhen,. Colorimetric Study of Annealing Effect on Fluorescence Performance of CdSe Quantum Dots[J]. Chinese Journal of Luminescence, 2015,36(6): 610-616
胡炼, 吴惠桢,. 退火对CdSe量子点荧光影响的色度学研究[J]. 发光学报, 2015,36(6): 610-616 DOI： 10.3788/fgxb20153606.0610.

HU Lian, WU Hui-zhen,. Colorimetric Study of Annealing Effect on Fluorescence Performance of CdSe Quantum Dots[J]. Chinese Journal of Luminescence, 2015,36(6): 610-616 DOI： 10.3788/fgxb20153606.0610.

摘要

制备出两种尺寸的CdSe量子点。结合色度学分析

比较了固化在PMMA基质中两种尺寸CdSe量子点在退火中发生的不同变化以及相应光谱颜色的改变。小尺寸CdSe量子点在退火中有团聚的趋势

退火后荧光明显红移

如果退火温度超过一定范围

会产生显著的双尺寸分布效应

对应的色度坐标有从白光区域向上移动到绿色区域的趋势。较大尺寸的CdSe量子点

其热稳定性相对更好

退火造成荧光红移

对应绿色区域中的色度坐标有向右移动的趋势

但颜色改变不明显

因此更适合于发光显示方面的应用。

Abstract

Two sized CdSe quantum dots (QDs) were synthesized

and the polymethylmethacrylate (PMMA)-QD samples were annealed. The photoluminescence (PL) spectra of the samples were measured

and the annealing-induced effects on these two sized QDs were compared with colorimetric study. The QDs with small size tend to aggregate in annealing process

which results in the bimodal size distribution phenomenon. Caused by annealing

the CIE coordinate of small CdSe QDs shifts up to the green region from white region. The bigger QDs with better thermal stability have similar emission color before and after annealing

because the CIE coordinate in green region moves toward right slightly in annealing process. After all

the better thermal stability of bigger QDs makes them more suitable for the application of light emitting display.

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Keywords

references

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