1988
DOI: 10.1002/pssa.2211060233
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Optical properties of bromine-doped SnO2 coatings for solar applications

Abstract: Bromine doped SnO2 coatings are prepared using spray pyrolysis technique. The absorption coefficient is calculated in the fundamental absorption region. The absorption coefficient data are analysed and interpreted in terms of direct and indirect allowed transitions. Solar spectrum transmittance, reflection coefficient, refractive index, and figure of merit are estimated.

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Cited by 12 publications
(5 citation statements)
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“…The UV–vis data were transformed into an absorbance scale by Kubelka–Munk analysis and optical E g values determined using the Tauc method (Figure ). The direct E g for bulk SnO 2 occurs at 3.60 eV. , For SnO 2 NPs, there is on-going discussion about the direct versus indirect nature of the interband transition. For this reason, we examined both (α h ν) 2 and (α h ν) 1/2 versus photon energy plots to determine E g (Figure a,b). We note that the direct gap model yields E g values that are systematically larger than with the indirect gap analysis, and it leads to values that exceed that of bulk SnO 2 for our NPs prepared at the highest temperatures.…”
Section: Resultsmentioning
confidence: 99%
“…The UV–vis data were transformed into an absorbance scale by Kubelka–Munk analysis and optical E g values determined using the Tauc method (Figure ). The direct E g for bulk SnO 2 occurs at 3.60 eV. , For SnO 2 NPs, there is on-going discussion about the direct versus indirect nature of the interband transition. For this reason, we examined both (α h ν) 2 and (α h ν) 1/2 versus photon energy plots to determine E g (Figure a,b). We note that the direct gap model yields E g values that are systematically larger than with the indirect gap analysis, and it leads to values that exceed that of bulk SnO 2 for our NPs prepared at the highest temperatures.…”
Section: Resultsmentioning
confidence: 99%
“…The cosine term is an interference term and n is the substrate refractive index. Many workers [9,10] mentioned that in the region of the band-to-band transition, the absorption is large, the interference effect can be ignored, and ad is large, so is exp (ad) S R , R , exp (-ad). In the present work the absorption coefficient has been calculated by means of ratio recording techniques to eliminate the reflection losses.…”
Section: Resultsmentioning
confidence: 99%
“…Moreover, few reports have also demonstrated the effects of chlorine (Cl), bromine (Br), and I doping in SnO 2 . Abass et al [17][18][19], using several experiments with emphasis on optical and electrical properties, found pronounced improvements in these properties by halogen doping. Agashe et al [20] also studied the electrical properties of sprayed deposited SnO 2 films and showed that when replacing F dopants with Br, conductivity was reduced.…”
Section: Introductionmentioning
confidence: 99%