CdS/CdTe多晶薄膜的时间光谱特性

丁罕; 李泽龙; 丘志仁; 江绍基

doi:10.3788/fgxb20123306.0576

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CdS/CdTe多晶薄膜的时间光谱特性

材料合成及性能研究 | 更新时间：2020-08-12

- CdS/CdTe多晶薄膜的时间光谱特性
- Time-resolved Photoluminescence Studies of Polycrystalline CdS/CdTe
- 发光学报 2012年33卷第6期页码：576-580
- 作者机构：
  
  中山大学光电材料与技术国家重点实验室,广东广州,510275
- 作者简介：
- 基金信息：
  
  国家自然科学基金(60977042)();广东省自然科学基金(9151027501000070)资助项目()
- DOI：10.3788/fgxb20123306.0576
  中图分类号： O433
- 纸质出版日期：2012-6-10，
  
  网络出版日期：2012-6-10，
  
  收稿日期：2012-3-18，
  
  修回日期：2012-4-19，
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丁罕, 李泽龙, 丘志仁, 江绍基. CdS/CdTe多晶薄膜的时间光谱特性[J]. 发光学报, 2012,(6): 576-580

DING Han, LI Ze-long, QIU Zhi-ren, JIANG Shao-ji. Time-resolved Photoluminescence Studies of Polycrystalline CdS/CdTe[J]. Chinese Journal of Luminescence, 2012,(6): 576-580
丁罕, 李泽龙, 丘志仁, 江绍基. CdS/CdTe多晶薄膜的时间光谱特性[J]. 发光学报, 2012,(6): 576-580 DOI： 10.3788/fgxb20123306.0576.

DING Han, LI Ze-long, QIU Zhi-ren, JIANG Shao-ji. Time-resolved Photoluminescence Studies of Polycrystalline CdS/CdTe[J]. Chinese Journal of Luminescence, 2012,(6): 576-580 DOI： 10.3788/fgxb20123306.0576.

摘要

采用超短皮秒脉冲激光激发制备了SnO

:F 玻璃衬底和石英衬底的CdTe多晶薄膜

在室温下测量其稳态和瞬态荧光光谱。结果表明

随着激发功率的增大

其荧光光谱峰逐渐展宽

并发生蓝移。对于退火处理的样品

其荧光光谱伴随主峰旁出现一个肩峰

是Cl 原子与富Cd区存在的空位形成复合体引起的发射。其瞬态荧光光谱寿命呈双指数衰减

即表面效应所引起的慢过程和带边激子态发射的快过程组成。样品退火处理后荧光寿命变长

有利于电子-空穴对在复合发光前分离

提高电子空穴的迁移率

改善其光伏性能。

Abstract

In this work

the steady-state photoluminescence (PL) and time-resolved photoluminescence(TRPL) of polycrystalline CdTe on different substrates were measured at room temperature by a Nd:YAG picosecond laser as the excitation source. With the increasing of pump power

the PL spectra have been broadened towards high photon energy. The PL spectra of the annealed sample exhibit another small band

which is attributed to the donor-acceptor pair recombination by a chlorine donor and a cadmium vacancy complex acceptor. The PL decay curve presents bi-exponential processes. The processes with long and short lifetimes are related to surface trapping state and band-edge excitonic state

respectively. Annealing treatment makes the fluorescence lifetime longer and benefits for the separation of the electron-hole pair before being composited.

关键词

CdTe退火光致发光荧光寿命

Keywords

CdTeannealingphotoluminescencefluorescence lifetime

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