Controlled interfacial electron dynamics in highly efficient Zn2 SnO4 -based dye-sensitized solar cells

ChemSusChem
Seong Sik ShinKug Sun Hong

Abstract

Among ternary oxides, Zn2 SnO4 (ZSO) is considered for dye-sensitized solar cells (DSSCs) because of its wide bandgap, high optical transmittance, and high electrical conductivity. However, ZSO-based DSSCs have a poor performance record owing largely to the absence of systematic efforts to enhance their performance. Herein, general strategies are proposed to improve the performance of ZSO-based DSSCs involving interfacial engineering/modification of the photoanode. A conformal ZSO thin film (blocking layer) deposited at the fluorine-doped tin oxide-electrolyte interface by pulsed laser deposition suppressed the back-electron transfer effectively while maintaining a high optical transmittance, which resulted in a 22 % improvement in the short-circuit photocurrent density. Surface modification of ZSO nanoparticles (NPs) resulted in an ultrathin ZnO shell layer, a 9 % improvement in the open-circuit voltage, and a 4 % improvement in the fill factor because of the reduced electron recombination at the ZSO NPs-electrolyte interface. The ZSO-based DSSCs exhibited a faster charge injection and electron transport than their TiO2 -based counterparts, and their superior properties were not inhibited by the ZnO shell layer, which indicate...Continue Reading

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May 29, 2012·Journal of Nanoscience and Nanotechnology·Seong Sik ShinKug Sun Hong
Jan 12, 2013·Scientific Reports·Jin-Wook LeeNam-Gyu Park
Feb 19, 2013·ChemSusChem·Dong Wook KimKug Sun Hong

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Citations

Mar 5, 2016·Physical Chemistry Chemical Physics : PCCP·N RajamanickamK Ramachandran
Apr 4, 2020·Chemical Communications : Chem Comm·Lingling TaoSong Xue

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