Ultraviolet photodetection characteristics of Zinc oxide thin films and nanostructures

被引：55

作者：

Ghosh, S. P. ^{[1
]}

Das, K. C. ^{[1
]}

Tripathy, N. ^{[1
]}

Bose, G. ^{[2
]}

Kim, D. H. ^{[3
]}

Lee, T. I. ^{[4
]}

Myoung, J. M. ^{[3
]}

Kar, J. P. ^{[1
]}

机构：

[1] Natl Inst Technol, Dept Phys & Astron, Rourkela 769008, India

[2] IFHE Univ, FST, Hyderabad 501203, India

[3] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

[4] Gachon Univ, Dept Bionanotechnol, Gyeonggi Do 461701, South Korea

来源：

5TH NATIONAL CONFERENCE ON PROCESSING AND CHARACTERIZATION OF MATERIALS | 2016年 / 115卷

基金：

新加坡国家研究基金会;

关键词：

Thin films; Nanostructures; Photodetection; Ultraviolet; Zinc Oxide; HIGH-SENSITIVITY; PHOTOCONDUCTIVITY; SENSORS;

D O I：

10.1088/1757-899X/115/1/012035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

ZnO thin films were deposited by using RF sputtering technique at 150W and 4x10(-3) mbar pressure. Post-deposition rapid thermal annealing of ZnO thin films were carried out at 1000 degrees C for 600sec. ZnO nanostructures (nanowires/nanorods) were hydrothermally grown by using equimolar solution of Zinc nitrate and hexamethyltetramine. Morphology of ZnO thin films and nanostructures were investigated using scanning electron microscope. A comparative study on the ultraviolet photodetection behaviour of ZnO thin films and nanostructures were carried out by adopting current-voltage measurement technique at room temperature. ZnO annealed films have shown relatively lower transient photocurrent decay as compared to as-deposited film, which may be due to the faster evacuation of the charge carries. However, in case of ZnO nanorods transient photocurrent decay is relatively slow than that of nanowires, which is attributed to delayed readsorption of oxygen molecules onto the nanorods surface due to its larger width.

引用

页数：7

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