Pyrite (FeS2) thin films prepared by spray method using FeSO4 and (NH4)2Sx

被引：73
|
作者：
Yamamoto, A
Nakamura, M
Seki, A
Li, EL
Hashimoto, A
Nakamura, S
机构：
[1] Fukui Univ, Fac Engn, Dept Elect & Elect Engn, Fukui 9108507, Japan
[2] Tsuyama Natl Coll Technol, Tsuyama, Okayama 6580824, Japan
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2003年 / 75卷 / 3-4期
关键词：
iron pyrite (FeS2); spray method; sulfurization; FeSO4; (NH4)(2)S-x; Hall measurement;
D O I：
10.1016/S0927-0248(02)00205-2
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A simple spray method for the preparation of pyrite (FeS2) thin films has been studied using FeSO4 and (NH4)(2)S-x as precursors for Fe and S, respectively. Aqueous solutions of these precursors are sprayed alternately onto a substrate heated up to 120degreesC. Although Fe-S compounds including pyrite are formed on the substrate by the spraying, sulfurization of deposited films is needed to convert other phases such as FeS or marcasite into pyrite. A single-phase pyrite film is obtained after the sulfurization in a H2S atmosphere at around 500degreesC for 30 min. All pyrite films prepared show p-type conduction. They have a carrier concentration (p) in the range 10(16)-10(20) cm(-3) and a Hall mobility (mu(H)) in the range 200-1 cm(2)/ Vs. The best electrical properties (p = 7 x 10(16) cm(-3), mu(H) = 210cm(2)/Vs) for a pyrite film prepared here show the excellence of this method. The use of a lower concentration FeSO4 solution is found to enhance grain growth of pyrite crystals and also to improve electrical properties of pyrite films. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：451 / 456
页数：6
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