Hydrogen-related complexes in Li-diffused ZnO single crystals

被引：12

作者：

Corolewski, Caleb D. ^{[1
]}

Parmar, Narendra S. ^{[2
]}

Lynn, Kelvin G. ^{[2
]}

McCluskey, Matthew D. ^{[1
,3
]}

机构：

[1] Washington State Univ, Mat Sci & Engn Program, Pullman, WA 99164 USA

[2] Washington State Univ, Ctr Mat Res, Pullman, WA 99164 USA

[3] Washington State Univ, Dept Phys & Astron, Pullman, WA 99164 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2016年 / 120卷 / 03期

关键词：

LUMINESCENCE; GROWTH; DONOR; IDENTIFICATION; SPECTROSCOPY; ACCEPTOR; DEFECTS; LITHIUM; CARBON; FILMS;

D O I：

10.1063/1.4959106

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Zinc oxide (ZnO) is a wide band gap semiconductor and a potential candidate for next generation white solid state lighting applications. In this work, hydrogen-related complexes in lithium diffused ZnO single crystals were studied. In addition to the well-known Li-OH complex, several other hydrogen defects were observed. When a mixture of Li2O and ZnO is used as the dopant source, zinc vacancies are suppressed and the bulk Li concentration is very high (>10(19) cm(-3)). In that case, the predominant hydrogen complex has a vibrational frequency of 3677 cm(-1), attributed to surface O-H species. When Li2CO3 is used, a structured blue luminescence band and O-H mode at 3327 cm(-1) are observed at 10 K. These observations, along with positron annihilation measurements, suggest a zinc vacancy-hydrogen complex, with an acceptor level similar to 0.3 eV above the valence-band maximum. This relatively shallow acceptor could be beneficial for p-type ZnO. Published by AIP Publishing.

引用

页数：5

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