Optical and electrical properties of undoped ZnO films

Yow-Jon Lin, Chia Lung Tsai, Yang Ming Lu, Chia-Jyi Liu

Research output: Contribution to journalArticle

118 Citations (Scopus)

Abstract

Optical and electrical properties of undoped ZnO films were investigated in this study. We find that the conductivity increased with increasing the ratio of (blue luminescence+green luminescence) to ultraviolet luminescence [i.e., (BL+GL) UVL] defect emission intensities, due to the increase of the singly ionized oxygen vacancy. We deduce that the BL and GL are related to the oxygen-vacancy deep level and the yellow luminescence is attributed to the band-acceptor transition. We also find that poorer crystal quality may lead to the reduction of the optical transmittance. This suggests that these defects and the crystal quality interact to change the conductivity and optical transmittance of ZnO. The spectroscopic correlations may be used as a predictive tool to identify the quality of ZnO.

Original languageEnglish
Article number093501
JournalJournal of Applied Physics
Volume99
Issue number9
DOIs
Publication statusPublished - 2006 May 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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