Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating
Abstract Lead-free Cs3Bi2I9 single crystals have been demonstrated to be promising materials for direct X-ray detectors with remarkable performance. However, their application for 2D X-ray imaging is hindered by their time-consuming preparation and limited crystal size. In this paper, a thick Cs3Bi2...
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Nature Portfolio
2024-06-01
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| Series: | NPG Asia Materials |
| Online Access: | https://doi.org/10.1038/s41427-024-00552-w |
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| author | Yen-Ting Chen Zi-Xiang Wen Chen-Fu Lin Ming-Hsien Li Peter Chen |
| author_facet | Yen-Ting Chen Zi-Xiang Wen Chen-Fu Lin Ming-Hsien Li Peter Chen |
| author_sort | Yen-Ting Chen |
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| description | Abstract Lead-free Cs3Bi2I9 single crystals have been demonstrated to be promising materials for direct X-ray detectors with remarkable performance. However, their application for 2D X-ray imaging is hindered by their time-consuming preparation and limited crystal size. In this paper, a thick Cs3Bi2I9 perovskite film fabricated via facile spray coating at a low processing temperature, which increases the area of the photoactive film, reduces the processing time, decreases the energy budget and the production cost, and enhances the production yield due to high material utilization, has great potential for commercial applications. Careful control of the processing temperature and intervals during spray coating results in a dense and thick perovskite film with well-stacked perovskite domains. The compact perovskite film enhances the charge transport capability of the Cs3Bi2I9 perovskite film and reduces the dark current density of the X-ray detector. The resultant X-ray detector, prepared through a two-step spray coating process, exhibited a sensitivity of 127.23 μC Gyair −1 cm−2 and a detection limit of 7.4 μGyair s−1. In addition, the device delivers long-term stability with a consistent photoresponse when exposed to consecutive X-ray pulse irradiation. |
| format | Article |
| id | doaj-art-62ba4fdf5c784d68a6ad70f75d4211bc |
| institution | Kabale University |
| issn | 1884-4057 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Nature Portfolio |
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| series | NPG Asia Materials |
| spelling | doaj-art-62ba4fdf5c784d68a6ad70f75d4211bc2025-01-19T12:28:27ZengNature PortfolioNPG Asia Materials1884-40572024-06-0116111510.1038/s41427-024-00552-wInorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coatingYen-Ting Chen0Zi-Xiang Wen1Chen-Fu Lin2Ming-Hsien Li3Peter Chen4Department of Photonics, National Cheng Kung UniversityDepartment of Photonics, National Cheng Kung UniversityDepartment of Photonics, National Cheng Kung UniversityDepartment of Applied Materials and Optoelectronic Engineering, National Chi Nan UniversityDepartment of Photonics, National Cheng Kung UniversityAbstract Lead-free Cs3Bi2I9 single crystals have been demonstrated to be promising materials for direct X-ray detectors with remarkable performance. However, their application for 2D X-ray imaging is hindered by their time-consuming preparation and limited crystal size. In this paper, a thick Cs3Bi2I9 perovskite film fabricated via facile spray coating at a low processing temperature, which increases the area of the photoactive film, reduces the processing time, decreases the energy budget and the production cost, and enhances the production yield due to high material utilization, has great potential for commercial applications. Careful control of the processing temperature and intervals during spray coating results in a dense and thick perovskite film with well-stacked perovskite domains. The compact perovskite film enhances the charge transport capability of the Cs3Bi2I9 perovskite film and reduces the dark current density of the X-ray detector. The resultant X-ray detector, prepared through a two-step spray coating process, exhibited a sensitivity of 127.23 μC Gyair −1 cm−2 and a detection limit of 7.4 μGyair s−1. In addition, the device delivers long-term stability with a consistent photoresponse when exposed to consecutive X-ray pulse irradiation.https://doi.org/10.1038/s41427-024-00552-w |
| spellingShingle | Yen-Ting Chen Zi-Xiang Wen Chen-Fu Lin Ming-Hsien Li Peter Chen Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating NPG Asia Materials |
| title | Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating |
| title_full | Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating |
| title_fullStr | Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating |
| title_full_unstemmed | Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating |
| title_short | Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating |
| title_sort | inorganic cs3bi2i9 lead free halide perovskite film for large area x ray detector via low cost ambient spray coating |
| url | https://doi.org/10.1038/s41427-024-00552-w |
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