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Pb/S/1,2-ethanedithiol composite thin films for efficient solid-state quantum-dot sensitized TiO2 nanorod array solar cells

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Abstract

The Pb/S/1,2-ethanedithiol composite thin films were successfully deposited on TiO2 nanorod arrays by spin-coating step-by-step 5 mmol dm−3 Pb(NO3)2, Na2S and 1% 1,2-ethanedithiol solution and their chemical compositions can be easily adjusted by changing the concentration of Na2S solution from 5 to 3.5 mmol dm−3 and 2 mmol dm−3. The average crystal sizes of Pb/S/1,2-ethanedithiol quantum-dots decreased from 7.9 to 7.1 nm and 6.5 nm with the decrease of the concentration of Na2S solution and the chemical bonding of Pb2+ and S in EDT was chelation of the penta-heterocycle in Pb/S/1,2-ethanedithiol composite thin films. All solid-state Pb/S/1,2-ethanedithiol composite thin film sensitized TiO2 nanorod array solar cells using 5, 3.5, 2 mmol dm−3 Na2S solution exhibited the photoelectric conversion efficiency of 2.68, 3.41 and 4.51% under the illumination of simulated AM 1.5 sunlight (100 mA cm−2).

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (51272061, 51472071) and Talent Project of Hefei University of Technology (75010-037004, 75010-037003).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, People’s Republic of China

    Chengfeng Ma, Chengwu Shi, Kai Lv, Zhangpeng Shao & Wangchao Chen

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  1. Chengfeng Ma
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  2. Chengwu Shi
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  3. Kai Lv
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Correspondence to Chengwu Shi.

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Ma, C., Shi, C., Lv, K. et al. Pb/S/1,2-ethanedithiol composite thin films for efficient solid-state quantum-dot sensitized TiO2 nanorod array solar cells. J Mater Sci: Mater Electron 29, 11783–11789 (2018). https://doi.org/10.1007/s10854-018-9277-8

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  • DOI: https://doi.org/10.1007/s10854-018-9277-8

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