Polyoxovanadate-modified SnO2 electron transport layer for perovskite photodetectors
SnO2 is widely used in perovskite photodetectors as an electron transport layer material. The matching of the energy levels of SnO2 and perovskite is important in carrier transport. Polyoxovanadates (POVs), as semiconductor-like molecules, exhibit good redox and excellent optical properties, which c...
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Tsinghua University Press
2025-03-01
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| Series: | Polyoxometalates |
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| Online Access: | https://www.sciopen.com/article/10.26599/POM.2024.9140076 |
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| author | Ziting Liu Yijia Hao Jing Zhang Yi He Weilin Chen |
| author_facet | Ziting Liu Yijia Hao Jing Zhang Yi He Weilin Chen |
| author_sort | Ziting Liu |
| collection | DOAJ |
| description | SnO2 is widely used in perovskite photodetectors as an electron transport layer material. The matching of the energy levels of SnO2 and perovskite is important in carrier transport. Polyoxovanadates (POVs), as semiconductor-like molecules, exhibit good redox and excellent optical properties, which can regulate the energy band structure of SnO2. Here, K5MnV11O32·10H2O (MnV11), K7MnV13O38·18H2O (MnV13), (NH4)8[V19O41(OH)9]·11H2O (V19), and K10[V34O82]·20H2O (V34) were used to modify an SnO2 colloidal solution. Energy level tests demonstrated that the conduction band potential (ECB) of MnV13-modified SnO2 increased from −4.43 to −4.03 eV, which matched more with the energy level of perovskite. This facilitated the extraction and transmission of photogenerated carriers. X-ray diffraction showed that POV-modified SnO2 exhibited better crystallinity. Scanning electron microscopy revealed that the grain size of perovskite increased to 580 nm after modification using MnV13. The final results showed that the MnV13-modified perovskite photodetector demonstrated the best efficiency. The photocurrent of the photodetector increased from 26 to 80 μA, and its stability was good. After 720 h, the normalized current values of unencapsulated devices on the MnV13@SnO2 substrate were maintained at more than 70% of the initial values. The study findings show that introducing POVs into photodetectors is a potential strategy for optimizing the performance of photovoltaic devices. |
| format | Article |
| id | doaj-art-8d20eea69d6c4568b4ceecc6b2385c92 |
| institution | Kabale University |
| issn | 2957-9821 2957-9503 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Tsinghua University Press |
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| series | Polyoxometalates |
| spelling | doaj-art-8d20eea69d6c4568b4ceecc6b2385c922025-01-24T08:12:25ZengTsinghua University PressPolyoxometalates2957-98212957-95032025-03-0141914007610.26599/POM.2024.9140076Polyoxovanadate-modified SnO2 electron transport layer for perovskite photodetectorsZiting Liu0Yijia Hao1Jing Zhang2Yi He3Weilin Chen4https://orcid.org/0000-0002-4279-3534Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, ChinaKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, ChinaKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, ChinaKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, ChinaKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, ChinaSnO2 is widely used in perovskite photodetectors as an electron transport layer material. The matching of the energy levels of SnO2 and perovskite is important in carrier transport. Polyoxovanadates (POVs), as semiconductor-like molecules, exhibit good redox and excellent optical properties, which can regulate the energy band structure of SnO2. Here, K5MnV11O32·10H2O (MnV11), K7MnV13O38·18H2O (MnV13), (NH4)8[V19O41(OH)9]·11H2O (V19), and K10[V34O82]·20H2O (V34) were used to modify an SnO2 colloidal solution. Energy level tests demonstrated that the conduction band potential (ECB) of MnV13-modified SnO2 increased from −4.43 to −4.03 eV, which matched more with the energy level of perovskite. This facilitated the extraction and transmission of photogenerated carriers. X-ray diffraction showed that POV-modified SnO2 exhibited better crystallinity. Scanning electron microscopy revealed that the grain size of perovskite increased to 580 nm after modification using MnV13. The final results showed that the MnV13-modified perovskite photodetector demonstrated the best efficiency. The photocurrent of the photodetector increased from 26 to 80 μA, and its stability was good. After 720 h, the normalized current values of unencapsulated devices on the MnV13@SnO2 substrate were maintained at more than 70% of the initial values. The study findings show that introducing POVs into photodetectors is a potential strategy for optimizing the performance of photovoltaic devices.https://www.sciopen.com/article/10.26599/POM.2024.9140076polyoxometalatesperovskitephotodetectorpolyoxovanadatesenergy level |
| spellingShingle | Ziting Liu Yijia Hao Jing Zhang Yi He Weilin Chen Polyoxovanadate-modified SnO2 electron transport layer for perovskite photodetectors Polyoxometalates polyoxometalates perovskite photodetector polyoxovanadates energy level |
| title | Polyoxovanadate-modified SnO2 electron transport layer for perovskite photodetectors |
| title_full | Polyoxovanadate-modified SnO2 electron transport layer for perovskite photodetectors |
| title_fullStr | Polyoxovanadate-modified SnO2 electron transport layer for perovskite photodetectors |
| title_full_unstemmed | Polyoxovanadate-modified SnO2 electron transport layer for perovskite photodetectors |
| title_short | Polyoxovanadate-modified SnO2 electron transport layer for perovskite photodetectors |
| title_sort | polyoxovanadate modified sno2 electron transport layer for perovskite photodetectors |
| topic | polyoxometalates perovskite photodetector polyoxovanadates energy level |
| url | https://www.sciopen.com/article/10.26599/POM.2024.9140076 |
| work_keys_str_mv | AT zitingliu polyoxovanadatemodifiedsno2electrontransportlayerforperovskitephotodetectors AT yijiahao polyoxovanadatemodifiedsno2electrontransportlayerforperovskitephotodetectors AT jingzhang polyoxovanadatemodifiedsno2electrontransportlayerforperovskitephotodetectors AT yihe polyoxovanadatemodifiedsno2electrontransportlayerforperovskitephotodetectors AT weilinchen polyoxovanadatemodifiedsno2electrontransportlayerforperovskitephotodetectors |