Effect of Tungsten Doping on the Properties of Titanium Dioxide Dye-Sensitized Solar Cells

Ming-Cheng Kao (), Jun-Hong Weng, Chih-Hung Chiang, Kai-Huang Chen, Lin Der-Yuh and Tsung-Kuei Kang
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Ming-Cheng Kao: Department of Information and Communication Engineering, Graduate Institute of Aeronautics, Chaoyang University of Technology, Taichung 413310, Taiwan
Jun-Hong Weng: Department of Electrical Engineering, Tunghai University, Taichung 413310, Taiwan
Chih-Hung Chiang: Department of Aeronautical Engineering, Graduate Institute of Aeronautics, Chaoyang University of Technology, Taichung 413310, Taiwan
Kai-Huang Chen: Department of Electronic Engineering, Cheng Shiu University, Kaohsiung 83347, Taiwan
Lin Der-Yuh: Department of Electronic Engineering, National Changhua University of Education, Changhua 50074, Taiwan
Tsung-Kuei Kang: Department of Electronic Engineering, Feng Chia University, Taichung 407102, Taiwan

Energies, 2024, vol. 17, issue 20, 1-11

Abstract: Tungsten-doped TiO 2 thin films were prepared by sol–gel method on fluorine-doped tin oxide-coated substrates as working electrodes of dye-sensitized solar cells. The influences of different W doping (0, 2, 4, 6, and 8 at%) on the microstructure, optical, and photovoltaic properties of the W-TiO 2 thin-film DSSCs were studied by the measurement of X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) analysis, and electrochemical impedance spectroscopy (EIS). An optimal DSSCs performance was observed with a 6 at% W-doped TiO 2 thin film, resulting in a Voc of 0.68 V, a Jsc of 20.2 mA/cm 2 , an FF of 68.6%, and an efficiency (η) of 9.42%. The efficiency of DSSCs with 6 at% W-doped TiO 2 photoanode improved by 75%. This is because the 6 at% W-doped TiO 2 thin film increases the specific surface area and electron transfer rate.

Keywords: tungsten; titanium oxide; thin films; dye-sensitized solar cells (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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