Modeling the optical properties of WO3 and WO3-SiO2 thin films

被引：18

作者：

Saygin-Hinczewski, D. ^{[2
]}

Hinczewski, M. ^{[3
]}

Sorar, I. ^{[2
]}

Tepehan, F. Z. ^{[2
]}

Tepehan, G. G. ^{[1
]}

机构：

[1] Kadir Has Univ, Fac Arts & Sci, TR-34083 Istanbul, Turkey

[2] Istanbul Tech Univ, Dept Phys, TR-34469 Istanbul, Turkey

[3] TUBITAK Bosphorus Univ, Feza Gursey Res Inst, TR-34680 Istanbul, Turkey

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2008年 / 92卷 / 08期

关键词：

sol-gel; WO3; WO3-SiO2; double Tauc-Lorentz model; Urbach tail; optical properties; surface morphology;

D O I：

10.1016/j.solmat.2008.01.021

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：

The optical properties and surface morphology of sol-gel spin coated WO3 and WO3-SiO2 composite films annealed at 250 and 400 degrees C are investigated. For the purpose of extracting the optical parameters of the films, a novel form for the dielectric function is introduced, consisting of two Tauc-Lorentz oscillators and an Urbach tail component, which is suited for amorphous multi-transition materials with substantial subgap absorption. The evolution of the refractive indices, transmittances, and band gaps with doping is marked by sizable shifts at 2.0-2.5% SiO2 doping for the 250 degrees C films, and 4.0-4.5% doping for the 400 degrees C films. In addition, pronounced changes in the surface roughness of the films occur at these doping values. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：821 / 829

页数：9

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