The Investigation of the Influence of a Cu<sub>2</sub>O Buffer Layer on Hole Transport Layers in MAPbI<sub>3</sub>-Based Perovskite Solar Cells
The passivation engineering of the hole transport layer in perovskite solar cells (PSCs) has significantly decreased carrier accumulation and open circuit voltage (<i>V<sub>oc</sub></i>) loss, as well as energy band mismatching, thus achieving the goal of high-power conversio...
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MDPI AG
2022-11-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/22/8142 |
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| author | Chunxiang Lin Guilin Liu Xi Xi Lan Wang Qiqi Wang Qiyan Sun Mingxi Li Bingjie Zhu David Perez de Lara Huachao Zai |
| author_facet | Chunxiang Lin Guilin Liu Xi Xi Lan Wang Qiqi Wang Qiyan Sun Mingxi Li Bingjie Zhu David Perez de Lara Huachao Zai |
| author_sort | Chunxiang Lin |
| collection | DOAJ |
| description | The passivation engineering of the hole transport layer in perovskite solar cells (PSCs) has significantly decreased carrier accumulation and open circuit voltage (<i>V<sub>oc</sub></i>) loss, as well as energy band mismatching, thus achieving the goal of high-power conversion efficiency. However, most devices incorporating organic/inorganic buffer layers suffer from poor stability and low efficiency. In this article, we have proposed an inorganic buffer layer of Cu<sub>2</sub>O, which has achieved high efficiency on lower work function metals and various frequently used hole transport layers (HTLs). Once the Cu<sub>2</sub>O buffer layer was applied to modify the Cu/PTAA interface, the device exhibited a high <i>V<sub>oc</sub></i> of 1.20 V, a high <i>FF</i> of 75.92%, and an enhanced <i>PCE</i> of 22.49% versus a <i>V<sub>oc</sub></i> of 1.12 V, <i>FF</i> of 69.16%, and PCE of 18.99% from the (PTAA/Cu) n-i-p structure. Our simulation showed that the application of a Cu<sub>2</sub>O buffer layer improved the interfacial contact and energy alignment, promoting the carrier transportation and reducing the charge accumulation. Furthermore, we optimized the combinations of the thicknesses of the Cu<sub>2</sub>O, the absorber layer, and PTAA to obtain the best performance for Cu-based perovskite solar cells. Eventually, we explored the effect of the defect density between the HTL/absorber interface and the absorber/ETL interface on the device and recommended the appropriate reference defect density for experimental research. This work provides guidance for improving the experimental efficiency and reducing the cost of perovskite solar cells. |
| first_indexed | 2024-03-09T18:12:08Z |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T18:12:08Z |
| publishDate | 2022-11-01 |
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| series | Materials |
| spelling | doaj.art-c6a3384ff4dc4e448ab0489efb448ac82023-11-24T09:04:51ZengMDPI AGMaterials1996-19442022-11-011522814210.3390/ma15228142The Investigation of the Influence of a Cu<sub>2</sub>O Buffer Layer on Hole Transport Layers in MAPbI<sub>3</sub>-Based Perovskite Solar CellsChunxiang Lin0Guilin Liu1Xi Xi2Lan Wang3Qiqi Wang4Qiyan Sun5Mingxi Li6Bingjie Zhu7David Perez de Lara8Huachao Zai9School of Science, Jiangnan University, Wuxi 214122, ChinaSchool of Science, Jiangnan University, Wuxi 214122, ChinaSchool of Science, Jiangnan University, Wuxi 214122, ChinaSchool of Internet of Things, Jiangnan University, Wuxi 214122, ChinaSchool of Science, Jiangnan University, Wuxi 214122, ChinaSchool of Science, Jiangnan University, Wuxi 214122, ChinaSchool of Science, Jiangnan University, Wuxi 214122, ChinaWuxi Institution of Supervision & Testing on Product Quality, Wuxi 214101, ChinaZhejiang Beyondsun Green Energy Technology Co., Ltd., Huzhou 313200, ChinaSchool of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, ChinaThe passivation engineering of the hole transport layer in perovskite solar cells (PSCs) has significantly decreased carrier accumulation and open circuit voltage (<i>V<sub>oc</sub></i>) loss, as well as energy band mismatching, thus achieving the goal of high-power conversion efficiency. However, most devices incorporating organic/inorganic buffer layers suffer from poor stability and low efficiency. In this article, we have proposed an inorganic buffer layer of Cu<sub>2</sub>O, which has achieved high efficiency on lower work function metals and various frequently used hole transport layers (HTLs). Once the Cu<sub>2</sub>O buffer layer was applied to modify the Cu/PTAA interface, the device exhibited a high <i>V<sub>oc</sub></i> of 1.20 V, a high <i>FF</i> of 75.92%, and an enhanced <i>PCE</i> of 22.49% versus a <i>V<sub>oc</sub></i> of 1.12 V, <i>FF</i> of 69.16%, and PCE of 18.99% from the (PTAA/Cu) n-i-p structure. Our simulation showed that the application of a Cu<sub>2</sub>O buffer layer improved the interfacial contact and energy alignment, promoting the carrier transportation and reducing the charge accumulation. Furthermore, we optimized the combinations of the thicknesses of the Cu<sub>2</sub>O, the absorber layer, and PTAA to obtain the best performance for Cu-based perovskite solar cells. Eventually, we explored the effect of the defect density between the HTL/absorber interface and the absorber/ETL interface on the device and recommended the appropriate reference defect density for experimental research. This work provides guidance for improving the experimental efficiency and reducing the cost of perovskite solar cells.https://www.mdpi.com/1996-1944/15/22/8142perovskite solar cellsCu<sub>2</sub>Oenergy level alignmentcarrier accumulationSCAPS-1D |
| spellingShingle | Chunxiang Lin Guilin Liu Xi Xi Lan Wang Qiqi Wang Qiyan Sun Mingxi Li Bingjie Zhu David Perez de Lara Huachao Zai The Investigation of the Influence of a Cu<sub>2</sub>O Buffer Layer on Hole Transport Layers in MAPbI<sub>3</sub>-Based Perovskite Solar Cells Materials perovskite solar cells Cu<sub>2</sub>O energy level alignment carrier accumulation SCAPS-1D |
| title | The Investigation of the Influence of a Cu<sub>2</sub>O Buffer Layer on Hole Transport Layers in MAPbI<sub>3</sub>-Based Perovskite Solar Cells |
| title_full | The Investigation of the Influence of a Cu<sub>2</sub>O Buffer Layer on Hole Transport Layers in MAPbI<sub>3</sub>-Based Perovskite Solar Cells |
| title_fullStr | The Investigation of the Influence of a Cu<sub>2</sub>O Buffer Layer on Hole Transport Layers in MAPbI<sub>3</sub>-Based Perovskite Solar Cells |
| title_full_unstemmed | The Investigation of the Influence of a Cu<sub>2</sub>O Buffer Layer on Hole Transport Layers in MAPbI<sub>3</sub>-Based Perovskite Solar Cells |
| title_short | The Investigation of the Influence of a Cu<sub>2</sub>O Buffer Layer on Hole Transport Layers in MAPbI<sub>3</sub>-Based Perovskite Solar Cells |
| title_sort | investigation of the influence of a cu sub 2 sub o buffer layer on hole transport layers in mapbi sub 3 sub based perovskite solar cells |
| topic | perovskite solar cells Cu<sub>2</sub>O energy level alignment carrier accumulation SCAPS-1D |
| url | https://www.mdpi.com/1996-1944/15/22/8142 |
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