期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 47, 期 8, 页码 4737-4741出版社
SPRINGER
DOI: 10.1007/s11664-018-6340-4
关键词
Ruthenium dyes; semiconductor; dye-sensitized solar cells; electrochemical impedance spectroscopy; charge carriers
资金
- HEC Pakistan
- US National Academy of Sciences, under the PAK-US Science and Technology Cooperation Program, Phase-V [5-530/PAK-US/HEC/2013/193]
A step-by-step heat treatment was applied to ruthenium-based N719 dye solution for its potential application in dye-sensitized solar cells (DSSCs). The effects were analyzed and compared with standard untreated devices. A significant increase in short circuit current density was observed by employing a step-by-step heating method for dye solution in DSSCs. This increase of J (sc) is attributed to the enhancement in dye adsorption by the surface of the semiconductor and the higher number of charge carriers generated. DSSCs fabricated by a heated dye solution have achieved an overall power conversion efficiency of 8.41% which is significantly higher than the efficiency of 7.31% achieved with DSSCs fabricated without heated dye. Electrochemical impedance spectroscopy and capacitance voltage studies were performed to understand the better performance of the device fabricated with heated dye. Furthermore, transient photocurrent and transient photovoltage measurements were also performed to gain an insight into interfacial charge carrier recombinations.
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