Enhanced photo conversion efficiency of Nb2O5/TiO2 bilayer photoanode for Dye-Sensitized Solar Cells

被引：13

作者：

Vibavakumar, S. ^{[1
]}

Nisha, K. D. ^{[1
]}

Manikandan, V. S.

Archana, J. ^{[1
]}

Navaneethan, M. ^{[1
,2
]}

Harish, S. ^{[1
,3
]}

机构：

[1] SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Funct Mat & Energy Devices Lab, Chennai 603203, Tamil Nadu, India

[2] SRM Inst Sci & Technol, Fac Engn & Technol, Nanotechnol Res Ctr NRC, Chennai 603203, Tamil Nadu, India

[3] Shizuoka Univ, Grad Sch Sci & Technol, 3-5-1 Johoku,Naka Ku, Hamamatsu, Shizuoka 4328011, Japan

来源：

OPTICAL MATERIALS | 2023年 / 140卷

关键词：

Nb 2 O 5 /TiO 2 bilayer photoanode; Screen printing; Recombination rate; Electron lifetime; Charge transfer resistance; LARGE-AREA; PERFORMANCE; LAYER; TRANSPORT; ELECTRODE; AU;

D O I：

10.1016/j.optmat.2023.113828

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work is focused to improve the photovoltaic parameters in DSSC by introducing a bilayer photoanode. Nb2O5/TiO2 bilayer photoanodes were prepared by screen printing method. The microstructural, crystalline nature, and morphological properties were analysed. Charge transfer processes in Nb2O5/TiO2 bilayer photoanode and TiO2 photoanode were analysed. The electron behavior in the device was investigated by electrochemical impedance spectroscopy (EIS) measurement. It was inferred that charge transfer resistance significantly lowered in the Nb2O5/TiO2 bilayer photoanode. In addition, the effective electron lifetime was significantly improved, and the recombination rate was reduced. DSSCs devices were fabricated using Nb2O5/TiO2 bilayer and TiO2 unilayers as photoanode, N719 dye, iodide-based electrolytes and platinum counter electrode. Highest efficiency of 5.4% was achieved in the bilayer photoanode system for an optimum thickness of Nb2O5.

引用

页数：7

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