Thermal annealing effect on zinc nitride thin films deposited by reactive rf-magnetron sputtering process

被引:13
作者
Wen, Ting [1 ]
Gautam, Madhav [1 ]
Soleimanpour, Amir M. [1 ]
Jayatissa, Ahalapitiya H. [1 ]
机构
[1] Univ Toledo, Mech Ind & Mfg Engn Dept, MEMS & Nanotechnol Lab, Toledo, OH 43606 USA
基金
美国国家科学基金会;
关键词
Zinc nitride; Thermal annealing; Crystal growth; Electronic transport; Optical properties; Photoconductivity; OPTICAL-PROPERTIES; ELECTRICAL CHARACTERIZATION; ZNO; OXIDATION;
D O I
10.1016/j.mssp.2012.10.004
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Zinc nitride films were deposited by reactive radio-frequency magnetron sputtering using a zinc target in a nitrogen and argon plasma. The deposited films were annealed in either air or O-2 at 300 degrees C to investigate the annealing effect on the microstructure, optical properties, and electronic characteristics of zinc nitride films. It was found that the annealing process decreased the crystallinity of zinc nitride films. It was also found that the optical band gap decreased from 1.33 eV to 1.14 eV after annealing. The analysis of film composition suggested that the concentration of oxygen increased slightly after annealing. Although the conduction type of both as-deposited and annealed films were n-type, the annealed films exhibited a higher resistivity, lower carrier concentration and lower mobility than the as-deposited films. Also, it was found that the as-deposited films did not exhibit any photoconducting behavior whereas the annealed films exhibited a pronounced photoconducting behavior. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:318 / 325
页数:8
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