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Current density enhancement for quantum dot-sensitized solar cells by modulation on the quantum dot loading amount of anatase nanowire array photoelectrodes

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Abstract

A second spin-coating process was employed for CuInS2 quantum dot (QD)-sensitized TiO2 nanowire-based solar cells, which is anticipated to increase the QD loading amount of photoelectrodes. And the photoelectrodes had been modulated by the quantum dot dispersion concentration and spin-coating cycles. The optical absorption spectra and photoluminescence spectra of different photoelectrodes were investigated, which had exhibited the larger QD loading amount and better charge separation property of photoelectrodes after the second spin-coating process. Meanwhile, a net connection structure had been formed between each nanowire by the suitable QD loading amount of the photoelectrodes, which had simultaneously provided more paths for charge transfer of the solar cells. By optimization, the CuInS2 QD-sensitized TiO2 nanowire solar cells prepared from QD dispersion concentration of 30 mg∙mL−1 and two spin-coating cycles had exhibited higher current density value, which had enhanced the photovoltaic conversion efficiency from 3.9 to 5.03%.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant No. 51802028); Natural Science Foundation of Hunan Province, China (Grant No. 2018JJ3527); the Key Scientific Research Project of the Education Department of Hunan Province (Grant No.16A002); and the Key Laboratory of Efficient & Clean Energy Utilization, the Education Department of Hunan Province (Grant No. 2017NGQ007). Thanks for the measurement support from Hunan Province 2011 Collaborative Innovation Center of Clean Energy and Smart Grid.

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Authors and Affiliations

  1. Key Laboratory of Efficient & Clean Energy Utilization, The Education Department of Hunan Province, Hunan Province 2011 Collaborative Innovation Center of Clean Energy and Smart Grid, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410111, People’s Republic of China

    Meng Wang, Zhuoyin Peng, Zuoqiu Ning, Jianlin Chen, Wei Li & Jian Chen

  2. School of Energy and Power Engineering, Beihang University, Beijing, 100191, People’s Republic of China

    Dong Huang

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  1. Meng Wang
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  2. Zhuoyin Peng
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  3. Zuoqiu Ning
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  4. Jianlin Chen
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  5. Wei Li
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  6. Jian Chen
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  7. Dong Huang
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Correspondence to Zhuoyin Peng.

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Wang, M., Peng, Z., Ning, Z. et al. Current density enhancement for quantum dot-sensitized solar cells by modulation on the quantum dot loading amount of anatase nanowire array photoelectrodes. J Solid State Electrochem 25, 2087–2096 (2021). https://doi.org/10.1007/s10008-021-04969-z

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  • DOI: https://doi.org/10.1007/s10008-021-04969-z

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