Effect of Nb Doping of TiO2 Electrode on Charge Transport in Dye-Sensitized Solar Cells
作者： Nikolay Tsvetkov , Liudmila Larina , Oleg Shevaleevskiy , Byung Tae Ahn
DOI: 10.1149/2.010111JES
关键词:
摘要: Dye-sensitized solar cells (DSCs) can be regarded as third-generation photovoltaic devices which have low fabrication costs and high performance. The efficiency of DSCs is influenced by the electron transport within TiO2-dye-electrolyte system improved modifying TiO2 electrode with Nb doping. Nb-doped undoped electrodes were fabricated investigated. layers prepared a sol-gel method followed hydrothermal treatment an content ranging from 0.7 to 3.5 mol%. obtained characterized using XRD, SEM, TEM, temperature PLmeasurements. Electrical impedance spectroscopy was used study electronic at TiO2-electrolyte interface. lifetime, found increase 8 ms for 26 based on doped 2.7 mol% Nb. in lifetime correlates rise short circuit current (Jsc). doping concentrations lower than 1.7 resistance interface consequently value open voltage (Voc). Doping increases both Jsc Voc values significantly improves device efficiency. © 2011 Electrochemical Society. [DOI: 10.1149/2.010111jes] All rights reserved.
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