UV-visible light photocurrent enhancement in STO thin films through metal-defect co-doping effect combined with Au plasmons
Thin films of SrTiO3 (STO) and niobium-doped SrTiO3(Nb-STO) were synthesized by sol gel method and loaded with gold nanoparticles. We investigated the effect of Nb doping and the associated defect formations, as well as plasmonic enhancement in photocurrent. Both pristine STO and Nb-STO films exhibited anodic photocurrent and enhancements in photocurrent were observed in the UV and visible region for Nb-STO films when subsequently increasing the annealing temperature. Further enhancement in UV and visible light catalytic activity was observed from the photocurrent action spectrum by loading gold nanoparticles on the Nb-STO.
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Document Type: Research Article
Publication date: February 1, 2017
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