CdZnTe 晶体中微米级富 Te 相与 PL 谱的对应关系

doi:10.3724/SP.J.1077.2011.00359

无机材料学报 ›› 2011, Vol. 26 ›› Issue (4): 359-363.DOI: 10.3724/SP.J.1077.2011.00359

CdZnTe 晶体中微米级富 Te 相与 PL 谱的对应关系

徐亚东 , 介万奇 , 王涛 , 俞鹏飞 , 杜园园 , 何亦辉

西北工业大学凝固技术国家重点实验室 , 西安 710072

收稿日期:2010-06-29 修回日期:2010-07-27 出版日期:2011-04-20 网络出版日期:2011-04-22
作者简介:徐亚东 (1982- ), 男 , 博士研究生 .
基金资助:
国家自然科学基金 (50872111, 50902114); “ 111 ”引智基金 (B08040)

Correlation between Te-rich Particles in CdZnTe Crystals and Corresponding PL Spectra

XU Ya-Dong,JIE Wan-Qi,WANG Tao,YU Peng-Fei,DU Yuan-Yuan,HE Yi-Hui

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China

Received:2010-06-29 Revised:2010-07-27 Published:2011-04-20 Online:2011-04-22
Supported by:
National Natural Science Foundation of China (50872111 , 50902114); Programme of Introducing Talents of Discipline to Universities (B08040)

摘要/Abstract

摘要： 采用红外透过显微镜(IRTM)观察了不同条件下生长的CdZnTe晶体中微米级富Te颗粒. 结合实际生长条件分析了不同富Te颗粒的产生以及形态演化. 通过低温光致发光(PL)谱研究了CdZnTe晶体中杂质、缺陷的状态, 以及晶体的结晶质量, 并测试了相应晶体的电阻率. 归纳出不同富Te颗粒的产生与对应晶体10K温度下PL谱中特征发光峰之间的关系. 研究表明:富Te条件下生长的晶体存在圆形、六边形以及三角形富Te颗粒,PL谱中(D⁰,X)峰强度占主导;按化学计量比生长的晶体存在十字交叉的富Te颗粒,PL谱中DAP峰强度占主导;Cd过量生长的晶体存在星形富Te颗粒, PL谱中(D⁰,X)半峰宽较宽.

关键词: CdZnTe晶体, 红外透过显微成像, 富Te颗粒, PL谱

Abstract: Micron-scale Te-rich particles presented in CdZnTe crystals were directly observed using infrared transmission microscopy (IRTM). The generation of various Te-rich particles was discussed in conjunction with the growth conditions. In order to evaluate the impurities and defects behaviors , and to examine the crystalline quality, photoluminescence (PL) spectra were obtained at 10 K. The corresponding resistivity was evaluated simultaneously. The correlation between different shaped Te-rich particles in CdZnTe crystals and the corresponding PL spectra at 10 K was concluded compared with the characterized photo-peak in PL spectra. Well-defined sphere, hexagonal and triangular shaped incoherent Te-rich particles were generally presented in CdZnTe crystals grown from the charge with excess Te, which the ( D⁰, X) peak usually dominated in the PL spectra. Cross-shaped Te-rich particles were found in CdZnTe crystals grown under stoichiometric condition where the DAP peak dominated in the PL spectra. Star-shaped Te-rich particles were normally obtained in CdZnTe crystals under Cd-rich conditions where the FWHM of ( D⁰, X) peak was wide .

Key words: CdZnTe crystal, infrared transmission microscopy, Te-rich particles, PL spectra

中图分类号:

TN304

徐亚东, 介万奇, 王涛, 俞鹏飞, 杜园园, 何亦辉. CdZnTe 晶体中微米级富 Te 相与 PL 谱的对应关系[J]. 无机材料学报, 2011, 26(4): 359-363.

XU Ya-Dong,JIE Wan-Qi,WANG Tao,YU Peng-Fei,DU Yuan-Yuan,HE Yi-Hui. Correlation between Te-rich Particles in CdZnTe Crystals and Corresponding PL Spectra[J]. Journal of Inorganic Materials, 2011, 26(4): 359-363.

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CdZnTe 晶体中微米级富 Te 相与 PL 谱的对应关系

Correlation between Te-rich Particles in CdZnTe Crystals and Corresponding PL Spectra

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