The Effect of Band-Gap on TiO2 Thin Film Considering Various Parameters

Majedul Haque Mithun, Abu Sayed, I. Rahaman
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引用次数: 4

Abstract

The aim of this work is to measure the effect of band-gap on TiO2 thin films by changing tetrabutylorthotitanate (TBOT), diethanolamine (DEA), and temperature. The sol-gel method is experimentally introduced to find out the better band-gap of TiO2 thin films by varying the concentration of TBOT (4 ml to 10 ml), DEA (2 ml to 5 ml), and temperature (350°C to 650°C). With the help of an ultraviolet-visible spectrophotometer for the wavelength of 300-900 nm, these thin films are characterized concerning optical properties (transmittance spectra, absorbance spectra, direct band-gap, and indirect band-gap). The direct and indirect band-gaps are found 3.38 eV and 3.25 eV respectively, which are close to or within the standard band-gap range of TiO2 (3.2 eV to 3.35 eV) and are found at 8 ml TBOT, 3 ml DEA, and a temperature of 550°C.
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考虑不同参数的带隙对TiO2薄膜的影响
本研究的目的是通过改变四丁基绿钛酸盐(TBOT)、二乙醇胺(DEA)和温度来测量带隙对TiO2薄膜的影响。实验引入溶胶-凝胶法,通过改变TBOT (4 ~ 10 ml)、DEA (2 ~ 5 ml)浓度和温度(350℃~ 650℃)来寻找TiO2薄膜较好的带隙。利用紫外-可见分光光度计对300-900 nm波长的薄膜进行了光学性质的表征(透射光谱、吸光度光谱、直接带隙和间接带隙)。直接带隙和间接带隙分别为3.38 eV和3.25 eV,接近或在TiO2的标准带隙范围内(3.2 eV ~ 3.35 eV),在8 ml TBOT, 3 ml DEA, 550℃的温度下发现。
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来源期刊
CiteScore
1.60
自引率
0.00%
发文量
12
审稿时长
18 weeks
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