Parallel multi-stacked photoanodes of Sb-doped p–n homojunction hematite with near-theoretical solar conversion efficiency
Abstract Developing transparent and efficient photoanodes is a challenging but essential task in tandem photoelectrochemical cell for unassisted solar water splitting without an external bias. Here we report construction of p–n homojunction hematite photoanodes by hybrid microwave annealing-induced...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-11-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-53967-y |
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| author | Chenyang Xu Hongxin Wang Hongying Guo Ke Liang Yuanming Zhang Weicong Li Junze Chen Jae Sung Lee Hemin Zhang |
| author_facet | Chenyang Xu Hongxin Wang Hongying Guo Ke Liang Yuanming Zhang Weicong Li Junze Chen Jae Sung Lee Hemin Zhang |
| author_sort | Chenyang Xu |
| collection | DOAJ |
| description | Abstract Developing transparent and efficient photoanodes is a challenging but essential task in tandem photoelectrochemical cell for unassisted solar water splitting without an external bias. Here we report construction of p–n homojunction hematite photoanodes by hybrid microwave annealing-induced single antimony doping, which results in the gradually-increased valence states from the surface to the inside by the unique features of hybrid microwave annealing. The Sb-doped p–n homojunction hematite photoanode exhibits improved performance and displays a good transparency, achieving a stable photocurrent density of ~4.21 mA cm−2 at 1.23 VRHE under 100 mW cm−2 solar irradiation, which is comparable to the reported state-of-the-art hematite photoanodes. More importantly, a parallel-connected stack of six photoanodes of transparent p–n homojunction records a near-theoretical photocurrent density of ~10 mA cm–2 at 1.23 VRHE under standard photoelectrochemical water splitting conditions, which serves as a useful reference for hematite photoanodes and promises its practical application for unbiased photoelectrochemical water splitting. |
| format | Article |
| id | doaj-art-7f0c212bc46943e289d36c7d3b9acff8 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-7f0c212bc46943e289d36c7d3b9acff82024-11-10T12:33:36ZengNature PortfolioNature Communications2041-17232024-11-0115111310.1038/s41467-024-53967-yParallel multi-stacked photoanodes of Sb-doped p–n homojunction hematite with near-theoretical solar conversion efficiencyChenyang Xu0Hongxin Wang1Hongying Guo2Ke Liang3Yuanming Zhang4Weicong Li5Junze Chen6Jae Sung Lee7Hemin Zhang8College of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, Sichuan UniversitySchool of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gilCollege of Materials Science and Engineering, Sichuan UniversityAbstract Developing transparent and efficient photoanodes is a challenging but essential task in tandem photoelectrochemical cell for unassisted solar water splitting without an external bias. Here we report construction of p–n homojunction hematite photoanodes by hybrid microwave annealing-induced single antimony doping, which results in the gradually-increased valence states from the surface to the inside by the unique features of hybrid microwave annealing. The Sb-doped p–n homojunction hematite photoanode exhibits improved performance and displays a good transparency, achieving a stable photocurrent density of ~4.21 mA cm−2 at 1.23 VRHE under 100 mW cm−2 solar irradiation, which is comparable to the reported state-of-the-art hematite photoanodes. More importantly, a parallel-connected stack of six photoanodes of transparent p–n homojunction records a near-theoretical photocurrent density of ~10 mA cm–2 at 1.23 VRHE under standard photoelectrochemical water splitting conditions, which serves as a useful reference for hematite photoanodes and promises its practical application for unbiased photoelectrochemical water splitting.https://doi.org/10.1038/s41467-024-53967-y |
| spellingShingle | Chenyang Xu Hongxin Wang Hongying Guo Ke Liang Yuanming Zhang Weicong Li Junze Chen Jae Sung Lee Hemin Zhang Parallel multi-stacked photoanodes of Sb-doped p–n homojunction hematite with near-theoretical solar conversion efficiency Nature Communications |
| title | Parallel multi-stacked photoanodes of Sb-doped p–n homojunction hematite with near-theoretical solar conversion efficiency |
| title_full | Parallel multi-stacked photoanodes of Sb-doped p–n homojunction hematite with near-theoretical solar conversion efficiency |
| title_fullStr | Parallel multi-stacked photoanodes of Sb-doped p–n homojunction hematite with near-theoretical solar conversion efficiency |
| title_full_unstemmed | Parallel multi-stacked photoanodes of Sb-doped p–n homojunction hematite with near-theoretical solar conversion efficiency |
| title_short | Parallel multi-stacked photoanodes of Sb-doped p–n homojunction hematite with near-theoretical solar conversion efficiency |
| title_sort | parallel multi stacked photoanodes of sb doped p n homojunction hematite with near theoretical solar conversion efficiency |
| url | https://doi.org/10.1038/s41467-024-53967-y |
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