无机材料学报2012，Vol.27Issue(8)：790-794,5.DOI:10.3724/SP.J.1077.2012.11548
坩埚中自由空间量对Bridgman法生长的CdZnTe晶体缺陷的影响
Influence of Free-space Volume in Ampoule on Defects of CdZnTe Crystal Grown by Bridgman Method
摘要
Abstract
CdZnTe crystal was grown by Bridgman method. The relationship between the free-space volume in the ampoule and the defects in CZT, such as Te inclusion and Cd vacancy, was studied by IR transmission microscopy and positron annihilation technique (PAT). With the decrease of the free-space volume in the ampoule, the density reduced from 6.67×104/cm2 to 2.36×103/cm2 with the reduction of Te inclusions. The average positron lifetime decreased from 325.4 ps to 323.4 ps with the decrease of the free-space volume, indicating a reduction of Cd vacancies. The improvement of IR transmittance and resistivity of CZT further demonstrates that lowing the free-space volume in the ampoule can effectively depress the defects in CZT crystal.关键词
CdZnTe/缺陷/正电子寿命/Te夹杂Key words
CdZnTe/ defect/ PAT/ Te inclusions分类
数理科学引用本文复制引用
李辉,闵嘉华,王林军,夏义本,张继军,叶邦角..坩埚中自由空间量对Bridgman法生长的CdZnTe晶体缺陷的影响[J].无机材料学报,2012,27(8):790-794,5.基金项目
国家自然科学基金(10675080) （10675080）
上海市重点学科基金(S30107) （S30107）
