Effects of Ge- and Sb-doping and annealing on the tunable bandgaps of SnS films

SnS, Ge- and Sb-doped SnS films with single orthorhombic SnS phase were fabricated via solvothermal routes and subsequent spin-coating, respectively. The substitution solubilities of Ge and Sb in SnS are about 6 and 5at.%, respectively. The bandgaps of Ge- and Sb-doped SnS films can be tuned in the...

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Veröffentlicht in:Thin solid films 2015-06, Vol.584, p.37-40
Hauptverfasser: Hsu, Hsuan-Tai, Chiang, Ming-Hung, Huang, Chen-Hao, Lin, Wen-Tai, Fu, Yaw-Shyan, Guo, Tzung-Fang
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container_title Thin solid films
container_volume 584
creator Hsu, Hsuan-Tai
Chiang, Ming-Hung
Huang, Chen-Hao
Lin, Wen-Tai
Fu, Yaw-Shyan
Guo, Tzung-Fang
description SnS, Ge- and Sb-doped SnS films with single orthorhombic SnS phase were fabricated via solvothermal routes and subsequent spin-coating, respectively. The substitution solubilities of Ge and Sb in SnS are about 6 and 5at.%, respectively. The bandgaps of Ge- and Sb-doped SnS films can be tuned in the ranges of 1.25–1.35 and 1.30–1.39eV, respectively. The possible mechanisms for the tunable bandgaps of Ge- and Sb-doped SnS films are discussed. For the Ge- and Sb-doped SnS films subjected to annealing at 200–350°C in N2, the bandgaps of 200°C-annealed films remain unchanged, while those of 300°C- and 350°C-annealed films decrease with the annealing temperature because of the evaporation of Ge and Sb respectively. •Ge- and Sb-doped SnS films were fabricated via spin-coating.•The solubilities of Ge and Sb in SnS are about 6 and 5at.%, respectively.•The bandgaps of SnS films can be tuned by Ge and Sb doping respectively.•Annealing above 300°C reduces the bandgaps of Ge- and Sb-doped SnS films.
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subjects Annealing
Antimony
Bandgap
Doping
Energy gaps (solid state)
Evaporation
Germanium
Solubility
Thin films
Tin sulfide
title Effects of Ge- and Sb-doping and annealing on the tunable bandgaps of SnS films
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