PASSIVATION OF GaSb SINGLE CRYSTAL SURFACES STUDIED BY PHOTOLUMINESCENCE

Author:

DIAZ-REYES J.1,CORONA-ORGANICHE E.1,HERRERA-PEREZ J. L.1,MENDOZA-ALVAREZ J. G.2

Affiliation:

1. CICATA-IPN. Unidad Puebla. Acatlan 63, Col. La Paz Puebla, Pue. 72160, México

2. Depto. de Fisica, Cinvestav-IPN. Apdo. Postal 14-740. México DF 07000, Mexico

Abstract

GaSb single crystals are the ideal substrates for the growth of InGaAsSb and AlGaAsSb heterostructures to fabricate optoelectronic devices in the medium infrared. GaSb surfaces are highly reactive to oxidation, the oxides grown on their surface have poor conductivity (~ 10-2 Ω-1 cm -l) and it produces high surface leak currents; so, the search for passivation layers to prevent such leak currents is crucial for the development of reliable and optimized devices. Different approaches to passivation films were developed; mixtures of H 2 O 2 + citric acid and H 2 O 2 + tartaric acid were used for anodic oxidation. Also, SiO 2 films deposited by a sol-gel process were used as passivation layers. In order to test the performance of these layers, the low temperature photoluminescence (PL) spectroscopy was measured in all samples. The PL spectra show a shift of the main emission peak to lower energies and an increase in the PL intensity for a factor of up to 9, indicating that a passivation process is taking place in the GaSb surface. These spectra and the origin of the changes in the PL spectra are discussed.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

Cited by 5 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3