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Enhanced charge extraction for all-inorganic perovskite solar cells by graphene oxide quantum dots modified TiO2 layer

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Abstract

All-inorganic cesium lead bromide (CsPbBr3) perovskite solar cells have been attracting growing interest due to superior performance stability and low cost. However, low light absorbance and large charge recombination at TiO2/CsPbBr3 interface or within CsPbBr3 film still prevent further performance improvement. Herein, we report devices with high power conversion efficiency (9.16%) by introducing graphene oxide quantum dots (GOQDs) between TiO2 and perovskite layers. The recombination of interfacial radiation can be effectively restrained due to enhanced charge transfer capability. GOQDs with C-rich active sites can involve in crystallization and fill within the CsPbBr3 perovskite film as functional semiconductor additives. This work provides a promising strategy to optimize the crystallization process and boost charge extraction at the surface/interface optoelectronic properties of perovskites for high efficient and low-cost solar cells.

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Acknowledgements

This work was partially supported by the National Natural Science Foundation of China (Grant Nos. 21776147, 21905153 and 61604086), the Qingdao Municipal Science and Technology Bureau (Grant No. 19-6-1-91-nsh) and A Project of Shandong Province Higher Educational Science and Technology Program (Grant No. J17KA013). Lifeng Dong also thanks financial support from the Malmstrom Endowed Fund at Hamline University.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China

    Yili Liu, Guoliang Che, Weizhong Cui, Beili Pang, Qiong Sun, Liyan Yu & Lifeng Dong

  2. Department of Physics, Hamline University, St. Paul, MN, 55104, USA

    Lifeng Dong

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  1. Yili Liu
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  2. Guoliang Che
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Correspondence to Beili Pang, Liyan Yu or Lifeng Dong.

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Liu, Y., Che, G., Cui, W. et al. Enhanced charge extraction for all-inorganic perovskite solar cells by graphene oxide quantum dots modified TiO2 layer. Front. Chem. Sci. Eng. 17, 516–524 (2023). https://doi.org/10.1007/s11705-022-2238-z

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  • DOI: https://doi.org/10.1007/s11705-022-2238-z

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