正电子深能级瞬态谱在Ga As缺陷研究中的应用  

Application of positron deep level transient spectroscopy to the study of defect in GaAs

作　　者：张英杰[1] 邓爱红[1] 幸浩洋[1] 龙娟娟[1] 喻菁[1] 于鑫翔[1] 程祥[1] 

机构地区：[1]四川大学物理学院应用物理系,成都610065

出　　处：《四川大学学报（自然科学版）》2008年第3期586-590,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(10775102)

摘　　要：本文介绍的正电子深能级瞬态谱（PDLTS）技术是结合了对固体缺陷有很高灵敏度的正电子湮没谱（PAS）和一些深能级瞬态谱（DLTS）技术而成新的实验方法．该技术能用来研究Ⅲ～Ⅴ，Ⅱ～Ⅵ族等半导体材料的缺陷特征，它的优点不仅能研究半导体材料中缺陷的电学特征而且还能够同时揭示这些电活性缺陷的微观结构信息．本文将介绍砷化镓中EL2缺陷能级的PDLTS研究，运用该技术并结合深能级Arrhenius分析，得到EL2能级值为0．82±0．02eV．A new positron deep level transient spectroscopy （PDLTS） technique, which is the combination of positron annihilation spectroscopy（PAS）and some DLTS techniques, was introduced. The PDLTS technique could be used to study defect characterization of Ⅲ-Ⅴ and Ⅱ- Ⅵgroup semiconductors. The promising advantage of this method over the conventional DLTS is that it could not only investigate electrical character of defects in semiconductor but also reveal microstructure information of these defects. In this work, EL2 defect level transient study in GaAs was introduced and the EL2 level value of 0.82 ± 0.02 eV was obtained by a standard Arrhenius analysis, similar to that in conventional DLTS studies.

关 键 词：正电子 半导体 深能级瞬态谱(DLTS) 正电子深能级瞬态谱(PDLTS) 

分 类 号：O571.23[理学—粒子物理与原子核物理] O472[理学—物理]