{"title":"Optical Properties of SnO2 and SnO2:F - An Experimental and Theoretical Approach","authors":"E. Ching-Prado, H. Miranda, A. Watson","doi":"10.1109/IESTEC46403.2019.00026","DOIUrl":null,"url":null,"abstract":"Thin films of SnO2 (TO) and SnO2: F (FTO) were prepared by spray pyrolysis technique on glass substrate. The UV-visible spectra show well-defined interference fringes and an average transmittance in the visible region of about 74 and 81% for TO and FTO, respectively. The dielectric function was determined through the classical Drude-Lorentz dispersion model. The bands of the imaginary dielectric function are associated with metal-like electrons, transitions in the band gap, and transitions within the conduction band due to oxygen vacancies in the rutile structure. The first principles calculations are also presented and discussed, using the Density Functional Theory (DFT) performed on the intrinsic TO and TO with oxygen vacancy in the tetragonal structure.","PeriodicalId":388062,"journal":{"name":"2019 7th International Engineering, Sciences and Technology Conference (IESTEC)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 7th International Engineering, Sciences and Technology Conference (IESTEC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IESTEC46403.2019.00026","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Thin films of SnO2 (TO) and SnO2: F (FTO) were prepared by spray pyrolysis technique on glass substrate. The UV-visible spectra show well-defined interference fringes and an average transmittance in the visible region of about 74 and 81% for TO and FTO, respectively. The dielectric function was determined through the classical Drude-Lorentz dispersion model. The bands of the imaginary dielectric function are associated with metal-like electrons, transitions in the band gap, and transitions within the conduction band due to oxygen vacancies in the rutile structure. The first principles calculations are also presented and discussed, using the Density Functional Theory (DFT) performed on the intrinsic TO and TO with oxygen vacancy in the tetragonal structure.
采用喷雾热解技术在玻璃基板上制备了SnO2 (TO)和SnO2: F (FTO)薄膜。紫外可见光谱显示出清晰的干涉条纹,在可见光区,TO和FTO的平均透过率分别为74%和81%。通过经典的德鲁德-洛伦兹色散模型确定了介电函数。假想介电函数的带与金属样电子、带隙中的跃迁以及金红石结构中氧空位引起的导带内的跃迁有关。利用密度泛函理论(DFT)对四边形结构中含氧空位的固有TO和TO进行了第一性原理计算。