SnS‐Quantum Dot Solar Cells Using Novel TiC Counter Electrode and Organic Redox Couples |
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| Authors: | Dr Wei Guo Yihua Shen Dr Mingxing Wu Dr Liang Wang Linlin Wang Prof Tingli Ma |
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| Institution: | State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian, 116024 (P.R. China), Fax: (+86)?411‐84986230 |
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| Abstract: | Low‐cost quantum‐dot sensitized solar cells (QDSSCs) were fabricated by using the earth‐abundant element SnS quantum dot, novel TiC counter electrodes, and the organic disulfide/thiolate (T2/T?) redox couple, and reached an efficiency of 1.03 %. QDSSCs based on I?/I3?, T2/T?, and S2?/Sx2? redox couples were assembled to study the role of the redox couples in the regeneration of sensitizers. Charge‐extraction results reveal the reasons for the difference in JSC in three QDSSCs based on I?/I3?, T2/T?, and S2?/Sx2? redox couples. The catalytic selectivity of TiC and Pt towards T2/T? and I?/I3? redox couples was investigated using Tafel polarization and electrochemical impedance analysis. These results indicated that Pt and TiC show a similar catalytic selectivity for I?/I3?. However, TiC possesses better catalytic activity for T2/T? than for I?/I3?. These results indicate the great potential of transition metal carbide materials and organic redox couples used in QDSSCs. |
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| Keywords: | carbides energy conversion organic redox couple quantum dots solar cells |
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