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Tailoring electrical property of the low-temperature processed SnO2 for high-performance perovskite solar cells

调控低温氧化锡电学性质制备高效率钙钛矿太阳能电池

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Abstract

Herein, we for the first time doped Nb5+ into the low-temperature (<100°C) SnO2 sol-gel route to tailor the electrical property of SnO2 layers and the band alignment between SnO2 and the normally used mixed perovskites. The results revealed that proper Nb5+ do** increased the conductivity of the SnO2 electron transport layer (ETL), and the conduction band (CB) level of the SnO2 ETL was shifted down to approach the CB level of perovskites, which facilitated the electron injection from perovskite to SnO2, accelerated the charge transport, and reduced the non-radiative recombination, leading to improved power conversion efficiency from 18.06% to 19.38%. The Nb5+ do** process provided an efficient route for fabricating high-efficiency perovskite solar cells (PSCs) at a temperature lower than 100°C, and promoted the commercialization progress of PSCs.

摘要

本文中我们首次在低温(<100°C)SnO2溶胶-凝胶中通过掺杂Nb5+调控SnO2电学性质, 使SnO2与混合离子钙钛矿之间形成更匹配的能级. 掺杂Nb5+后SnO2电子传输层导电率明显提升, 导带位置下移更加接**混合离子钙钛矿导带, 有效促进了电子由SnO2向钙钛矿层的注入, 并加速了电子传输过程, 二者的共同作用使非辐射复合几率降低, 器件效率由18.06%提升至19.38%. Nb5+掺杂SnO2为低温(<100°C)制备高效率钙钛矿太阳能电池提供了有效参考途径, 有望进一步推动钙钛矿太阳能电池的产业化进程.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (51273104 and 91433205).

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Authors and Affiliations

  1. Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Bei**g, 100084, China

    **g Liu  (刘京), Nan Li  (**楠), Qingshun Dong  (董庆顺), Jiangwei Li  (**江伟) & Liduo Wang  (王立铎)

  2. Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Changchun, 130024, China

    **g Liu  (刘京) & Chao Qin  (秦超)

Authors
  1. **g Liu  (刘京)
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  2. Nan Li  (**楠)
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  3. Qingshun Dong  (董庆顺)
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  4. Jiangwei Li  (**江伟)
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  5. Chao Qin  (秦超)
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  6. Liduo Wang  (王立铎)
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Corresponding author

Correspondence to Liduo Wang  (王立铎).

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**g Liu graduated from Bei**g University of Chemical Technology (BUCT) in 2016 with a bachelor’s degree. Currently, he is a postgraduate at Northeast Normal University, and receives united training at Tsinghua University. His research interest focuses on electron transport layers of perovskite solar cells.

Liduo Wang is a professor of the Department of Chemistry at Tsinghua University. He received his PhD degree from Nagoya University in 1995. Dr. Wang has once worked as a visiting scholar in the Department of Chemistry and as a research associate in the Department of Electrical and Electronic Engineering at Hong Kong University of Science and Technology, and as a postdoctoral researcher in the Department of Materials Science and Engineering, Tsinghua University. His current research interests include perovskite solar cells, organic-inorganic semiconductor multilayer and its optoelectronic properties.

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Liu, J., Li, N., Dong, Q. et al. Tailoring electrical property of the low-temperature processed SnO2 for high-performance perovskite solar cells. Sci. China Mater. 62, 173–180 (2019). https://doi.org/10.1007/s40843-018-9305-6

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  • DOI: https://doi.org/10.1007/s40843-018-9305-6

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