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Effects of post annealing on structural, electrical and optical properties of ZnO:Al thin films prepared by RF magnetron sputtering

  • Jianhua Ma*
  • , Yan Liang
  • , Niangjuan Yao
  • , Xiaojing Zhu
  • , Jinchun Jiang
  • , Junhao Chu
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Al doped ZnO (ZnO:Al, AZO) thin films were deposited on ordinary soda-lime glass (SLG) substrates by RF magnetron sputtering. Effects of post annealing (300~600 °C for 2~30 min in air and N2, respectively) were studied. All the films were wurtzite structure with highly c-axis preferential orientation. Their electrical properties were relatively stable at the post annealing temperature of 300 °C. As the temperature further increasing, post annealing in air leaded to drastic degradation in the electrical properties, while that in N2 had relatively small influence. Diffusion of alkali ions from SLG substrates was deduced to be one of the influence factors for electrical properties. The spectra measurements showed that the post annealing mainly affected the transmittance in the near-infrared and infrared (NIR-IR) range and the optical band gap (Eg). The variation of Eg was attributed to the Burstein-Moss (BM) shift modulated by many-body effects.

Original languageEnglish
Title of host publicationEighth International Conference on Thin Film Physics and Applications
DOIs
StatePublished - 2013
Externally publishedYes
Event8th International Conference on Thin Film Physics and Applications, TFPA 2013 - Shanghai, China
Duration: 20 Sep 201323 Sep 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9068
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference8th International Conference on Thin Film Physics and Applications, TFPA 2013
Country/TerritoryChina
CityShanghai
Period20/09/1323/09/13

Keywords

  • Electrical properties
  • Optical properties
  • Post annealing
  • ZnO:Al (AZO) thin films

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