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05 July 2021
Carbon nanodots enhanced performance of Cs0.15FA0.85PbI3 perovskite solar cells
Wenzhan Xu1,2(
),
Guodan Wei1,2(
)
),
Guodan Wei1,2(
)
Topics:
DefectsLead compoundsNanodots PerovskiteSemiconductor dopingSilver compoundsThin film solar cellsThin films
Cite this article:
Gao Y, Xu W, He F, et al.
Carbon nanodots enhanced performance of Cs0.15FA0.85PbI3 perovskite solar cells.
Nano Research,
2021, 14(7): 2294-2300.
https://doi.org/10.1007/s12274-020-3224-8
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A high-quality hybrid Cs0.15FA0.85PbI3 thin film is deposited through doping of carbon nanodots (CNDs) into perovskite precursor solution. The corresponding inverted planar perovskite solar cells (PSCs) of ITO/PTAA/Cs0.15FA0.85PbI3/PC61BM/BCP/Ag exhibit an improvement in efficiency from 17.36% to 20.06%, which could be attributed to the passivation of the defects at the crystallized perovskite thin film and enhanced perovskite phase uniformity. The results of electron trap density indicate that the addition of CNDs significantly reduces the defects density at the perovskite thin film and the recombination of charge carriers in transport process is minimized. These results demonstrate that low-cost CNDs are effective additives for passivating defects, further reducing charge carrier recombination and improving device efficiency.
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Carbon nanodots enhanced performance of Cs0.15FA0.85PbI3 perovskite solar cells
Wenzhan Xu1,2(
), Guodan Wei1,2(
)
), Guodan Wei1,2(
)
Abstract
A high-quality hybrid Cs0.15FA0.85PbI3 thin film is deposited through doping of carbon nanodots (CNDs) into perovskite precursor solution. The corresponding inverted planar perovskite solar cells (PSCs) of ITO/PTAA/Cs0.15FA0.85PbI3/PC61BM/BCP/Ag exhibit an improvement in efficiency from 17.36% to 20.06%, which could be attributed to the passivation of the defects at the crystallized perovskite thin film and enhanced perovskite phase uniformity. The results of electron trap density indicate that the addition of CNDs significantly reduces the defects density at the perovskite thin film and the recombination of charge carriers in transport process is minimized. These results demonstrate that low-cost CNDs are effective additives for passivating defects, further reducing charge carrier recombination and improving device efficiency.
Keywords:
carbon nanodots, passivation, perovskite solar cells, power conversion efficiency
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Publication history
Copyright
Acknowledgements
Publication history
Received: 23 September 2020
Revised: 01 November 2020
Accepted: 03 November 2020
Published:
05 July 2021
Issue date: July 2021
Copyright
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Acknowledgements
This work was supported by Shenzhen Science and Technology Innovation Committee (No. JCYJ20190809172615277) and China Postdoctoral Science Foundation (No. 2019TQ0163). This project was financially also supported by Shenzhen Municipal Development and Reform Commission, New Energy Technology Engineering Laboratory (No. SDRC [2016]172).
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