Photoconductive UV detectors based heterostructures of Cd and Mg doped ZnO sol gel thin films

Vettumperumal R.; Kalyanaraman S.; Thangavel R.

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Photoconductive UV detectors based heterostructures of Cd and Mg doped ZnO sol gel thin films

机译：Photoconductive UV detectors based heterostructures of Cd and Mg doped ZnO sol gel thin films

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摘要

The photoconductive properties of single (CdZnO/MgZnO, Li:CdZnO/MgZnO) and double (MgZnOgnO/MgZnO, CdZnO/ZnO/MgZnO) heterostructures were studied by sol gel method at different annealing temperatures. These structures were analysed by X-ray diffraction (XRD) and photoluminescence (PL). The photoconductive measurements were carried out by semiconductor parametric analyzer. The hexagonal wurtzite structure was retained with good crystalline nature. The UV related strong near band edge (NBE) emission, ultra violet and blue green emission peaks were observed from PL spectra. Photocurrent was observed to have enhanced as a result of annealing temperature and Li substitution in the doped ZnO lattice. The increase of responsivity at ten orders of magnitude was found. Meanwhile, the dark current was found to have increased slightly due to the adsorption of O-2 and H2O molecule on the surface of the film. Sub-linear behaviour of photocurrent was also observed. (C) 2014 Elsevier B.V. All rights reserved.

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来源
《Materials Chemistry and Physics》 |2014年第2期|237-242|共6页
作者
Vettumperumal R.; Kalyanaraman S.; Thangavel R.;
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作者单位

Sri Paramakalyani Coll, PG & Res Dept Phys, Alwarkurichi 627412, India;

Indian Sch Mines, Dept Appl Phys, Dhanbad 826004, Bihar, India;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程基础科学;工程材料学;
关键词
Multilayers; Thin films; Sol-gel growth; Electrical characterisation; Heterostructures; HIGH VISIBLE REJECTION; ULTRAVIOLET DETECTOR; FABRICATION; MGXZN1-XO; QUARTZ; PHOTODETECTORS; PHOTODIODES; ARRAYS; BLIND;

Photoconductive UV detectors based heterostructures of Cd and Mg doped ZnO sol gel thin films

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