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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (8): 1403-1409.DOI: 10.16553/j.cnki.issn1000-985x.2025.0124

• 研究论文 • 上一篇    下一篇

硒添加量对硒化镉单晶电学和光学性能的影响研究

窦瑛(), 王英民, 高彦昭, 程红娟()   

  1. 中国电子科技集团公司第四十六研究所,新型半导体晶体材料技术重点实验室,天津 300220
  • 收稿日期:2025-06-05 出版日期:2025-08-20 发布日期:2025-09-01
  • 通信作者: 程红娟,教授。E-mail:xiemn08@126.com
  • 作者简介:窦瑛(1987—),女,山西省人,硕士,高级工程师。E-mail:dyadw@126.com

Impact of Selenium Addition on Electrical and Optical Properties of CdSe Single Crystal

DOU Ying(), WANG Yingmin, GAO Yanzhao, CHENG Hongjuan()   

  1. CETC Key Laboratory of Advanced Semiconductor Crystal Materials and Technologies,the 46th Research Institute,China Electronics Technology Group Corporation,Tianjin 300220,China
  • Received:2025-06-05 Online:2025-08-20 Published:2025-09-01

摘要: 采用有籽晶的高压布里奇曼法生长出CdSe单晶,并对不同Se添加量的CdSe单晶进行了性能研究。结果表明,添加的Se填充了单晶中的VSe,降低了Cd/Se质量比,并未影响晶体的Raman特征峰。进而对添加Se的CdSe晶体的电学性能、光学性能和夹杂相进行了分析,数据表明,添加的Se填充VSe后,降低了CdSe单晶中的自由载流子浓度,提升了单晶电阻率,减弱了自由载流子对红外光子的吸收,同时添加Se增强了CdSe单晶结构的稳定性,降低了夹杂相密度,二者协同作用,优化了CdSe单晶的电学和光学性能,CdSe单晶呈现出高电阻率,达到108 Ω·cm以上,8~12 μm波段红外透过率提升到69%,为其在长波红外固体激光器等领域的应用提供了借鉴意义。

关键词: CdSe单晶; 添加Se; 电阻率; 红外透过率; 夹杂相密度; 电学性能; 光学性能

Abstract: In this paper, CdSe single crystals were grown by high-pressure Bridgman method with a seed. The properties of a series of Se-added single crystal CdSe were studied. The results show that the added selenium atom fills the selenium vacancies (VSe), which reduced Cd/Se mass ratio, and the position of Raman peak of the CdSe single crystals are not affected. Furthermore, electrical properties, optical properties and inclusion of Se-added CdSe single crystal were analyzed. The results indicate that after the selenium fills the VSe, the free carrier concentration in CdSe single crystals reduces, the resistivity increases, the free carrier absorption of infrared photons is weakened, the structural stability of CdSe single crystals is improved, and the inclusion density reduces. The synergistic effect of these two factors improves the electrical and optical properties of CdSe single crystals. The resistivity increases to more than 108 Ω·cm, and the infrared (IR) transmittance in 8~12 μm reaches to 69%. The research provides reference significance for the application of CdSe in long-wave IR solid-state lasers and other fields.

Key words: CdSe single crystal; selenium addition; resistivity; IR transmittance; inclusion density; electrical property; optical property

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