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Title: Effect of photoanode thickness on electrochemical performance of dye sensitized solar cell

The thickness of photoanode is crucial as it adsorbed a large amount of dye molecules that provide electrons for generation of electricity in dye sensitized solar cell (DSC). Thus, in order to realize the practical application of DSC, study on various thickness of photoanode need to be carried out to analyze its effect on the electrochemical behavior of dye sensitized solar cell. To enhance the conversion efficiency, an additional layer of TiO{sub 2} using TiCl{sub 4} treatment was deposited prior to the deposition of the photoanode (active area of 1cm{sup 2}) with the thickness of 6, 12, 18, 24, and 30 µm on fluorine doped tin oxide (FTO) glass substrate. The resulting photoanode after the soak in N719 dye for more than 12hrs were used to be assembled in a test cell in combination with liquid electrolyte and counter electrode. The fabricated cells were characterized by solar simulator, ultraviolet-visible spectroscopy (UV-VIS), and electrochemical impedance spectroscopy (EIS). Scanning electron microscopy (SEM) was used to approximate the thickness of photoanode. An optimum power conversion efficiency of 4.54% was obtained for the cell fabricated with 18 µm photoanode thickness. This is attributed to the reduced resistance related to electron transport in the TiO{sub 2}/dye/electrolyte interfacemore » as proven by the EIS result. This led to the reduction of internal resistance, the increase in the electron life time and the improvement in the conversion efficiency.« less
Authors:
; ;  [1] ; ;  [2]
  1. Electrical Engineering Department, UTP (Malaysia)
  2. Centre of Innovative Nanostructures and Nanodevices (COINN), UTP (Malaysia)
Publication Date:
OSTI Identifier:
22488634
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1669; Journal Issue: 1; Conference: SCMSM 2014: 23. scientific conference of Microscopy Society Malaysia, Tronoh (Malaysia), 10-12 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALORIMETRY; DEPOSITION; DOPED MATERIALS; DYES; ELECTRICITY; ELECTROCHEMISTRY; ELECTROLYTES; ELECTRONS; FLUORINE; IMPEDANCE; INTERFACES; LAYERS; SCANNING ELECTRON MICROSCOPY; SOLAR CELLS; SOLAR SIMULATORS; SUBSTRATES; TIN OXIDES; TITANIUM CHLORIDES; TITANIUM OXIDES; ULTRAVIOLET RADIATION