Monovalent Copper Cation Doping Enables High-Performance CsPbIBr<sub>2</sub>-Based All-Inorganic Perovskite Solar Cells
Organic–inorganic perovskite solar cells (PSCs) have delivered the highest power conversion efficiency (PCE) of 25.7% currently, but they are unfortunately limited by several key issues, such as inferior humid and thermal stability, significantly retarding their widespread application. To tackle the...
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/23/4317 |
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| author | Zhaonan Du Huimin Xiang Amin Xie Ran Ran Wei Zhou Wei Wang Zongping Shao |
| author_facet | Zhaonan Du Huimin Xiang Amin Xie Ran Ran Wei Zhou Wei Wang Zongping Shao |
| author_sort | Zhaonan Du |
| collection | DOAJ |
| description | Organic–inorganic perovskite solar cells (PSCs) have delivered the highest power conversion efficiency (PCE) of 25.7% currently, but they are unfortunately limited by several key issues, such as inferior humid and thermal stability, significantly retarding their widespread application. To tackle the instability issue, all-inorganic PSCs have attracted increasing interest due to superior structural, humid and high-temperature stability to their organic–inorganic counterparts. Nevertheless, all-inorganic PSCs with typical CsPbIBr<sub>2</sub> perovskite as light absorbers suffer from much inferior PCEs to those of organic–inorganic PSCs. Functional doping is regarded as a simple and useful strategy to improve the PCEs of CsPbIBr<sub>2</sub>-based all-inorganic PSCs. Herein, we report a monovalent copper cation (Cu<sup>+</sup>)-doping strategy to boost the performance of CsPbIBr<sub>2</sub>-based PSCs by increasing the grain sizes and improving the CsPbIBr<sub>2</sub> film quality, reducing the defect density, inhibiting the carrier recombination and constructing proper energy level alignment. Consequently, the device with optimized Cu<sup>+</sup>-doping concentration generates a much better PCE of 9.11% than the pristine cell (7.24%). Moreover, the Cu<sup>+</sup> doping also remarkably enhances the humid and thermal durability of CsPbIBr<sub>2</sub>-based PSCs with suppressed hysteresis. The current study provides a simple and useful strategy to enhance the PCE and the durability of CsPbIBr<sub>2</sub>-based PSCs, which can promote the practical application of perovskite photovoltaics. |
| first_indexed | 2024-03-09T17:38:05Z |
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| language | English |
| last_indexed | 2024-03-09T17:38:05Z |
| publishDate | 2022-12-01 |
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| series | Nanomaterials |
| spelling | doaj.art-cd1ceecc9af1412e810aeb695c16470f2023-11-24T11:49:01ZengMDPI AGNanomaterials2079-49912022-12-011223431710.3390/nano12234317Monovalent Copper Cation Doping Enables High-Performance CsPbIBr<sub>2</sub>-Based All-Inorganic Perovskite Solar CellsZhaonan Du0Huimin Xiang1Amin Xie2Ran Ran3Wei Zhou4Wei Wang5Zongping Shao6State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, ChinaState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, ChinaState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, ChinaState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, ChinaState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, ChinaState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, ChinaWA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA 6845, AustraliaOrganic–inorganic perovskite solar cells (PSCs) have delivered the highest power conversion efficiency (PCE) of 25.7% currently, but they are unfortunately limited by several key issues, such as inferior humid and thermal stability, significantly retarding their widespread application. To tackle the instability issue, all-inorganic PSCs have attracted increasing interest due to superior structural, humid and high-temperature stability to their organic–inorganic counterparts. Nevertheless, all-inorganic PSCs with typical CsPbIBr<sub>2</sub> perovskite as light absorbers suffer from much inferior PCEs to those of organic–inorganic PSCs. Functional doping is regarded as a simple and useful strategy to improve the PCEs of CsPbIBr<sub>2</sub>-based all-inorganic PSCs. Herein, we report a monovalent copper cation (Cu<sup>+</sup>)-doping strategy to boost the performance of CsPbIBr<sub>2</sub>-based PSCs by increasing the grain sizes and improving the CsPbIBr<sub>2</sub> film quality, reducing the defect density, inhibiting the carrier recombination and constructing proper energy level alignment. Consequently, the device with optimized Cu<sup>+</sup>-doping concentration generates a much better PCE of 9.11% than the pristine cell (7.24%). Moreover, the Cu<sup>+</sup> doping also remarkably enhances the humid and thermal durability of CsPbIBr<sub>2</sub>-based PSCs with suppressed hysteresis. The current study provides a simple and useful strategy to enhance the PCE and the durability of CsPbIBr<sub>2</sub>-based PSCs, which can promote the practical application of perovskite photovoltaics.https://www.mdpi.com/2079-4991/12/23/4317CsPbIBr<sub>2</sub>perovskite solar cellsall-inorganic perovskitesCu<sup>+</sup> dopingstability |
| spellingShingle | Zhaonan Du Huimin Xiang Amin Xie Ran Ran Wei Zhou Wei Wang Zongping Shao Monovalent Copper Cation Doping Enables High-Performance CsPbIBr<sub>2</sub>-Based All-Inorganic Perovskite Solar Cells Nanomaterials CsPbIBr<sub>2</sub> perovskite solar cells all-inorganic perovskites Cu<sup>+</sup> doping stability |
| title | Monovalent Copper Cation Doping Enables High-Performance CsPbIBr<sub>2</sub>-Based All-Inorganic Perovskite Solar Cells |
| title_full | Monovalent Copper Cation Doping Enables High-Performance CsPbIBr<sub>2</sub>-Based All-Inorganic Perovskite Solar Cells |
| title_fullStr | Monovalent Copper Cation Doping Enables High-Performance CsPbIBr<sub>2</sub>-Based All-Inorganic Perovskite Solar Cells |
| title_full_unstemmed | Monovalent Copper Cation Doping Enables High-Performance CsPbIBr<sub>2</sub>-Based All-Inorganic Perovskite Solar Cells |
| title_short | Monovalent Copper Cation Doping Enables High-Performance CsPbIBr<sub>2</sub>-Based All-Inorganic Perovskite Solar Cells |
| title_sort | monovalent copper cation doping enables high performance cspbibr sub 2 sub based all inorganic perovskite solar cells |
| topic | CsPbIBr<sub>2</sub> perovskite solar cells all-inorganic perovskites Cu<sup>+</sup> doping stability |
| url | https://www.mdpi.com/2079-4991/12/23/4317 |
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