Noble Metals Doping in Lead‐Free Double Perovskite Single Crystals: Achieving Near‐Infrared to X‐ray Broadband Photodetection
Semiconductor materials capable of broadband photodetection, spanning X‐rays to near‐infrared (NIR), are essential for applications in medical imaging, industrial inspection, security, and telecommunications. Conventional photodetectors like Si, Ge, InGaAs, and amorphous Se (a‐Se) often encounter tr...
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Wiley-VCH
2025-08-01
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| Online Access: | https://doi.org/10.1002/smsc.202500135 |
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| author | Donato Valli Roel Vanden Brande Vincent Herreman Qianrui Li Giacomo Romolini Jim Jui‐Kai Chen Muhammed Shameem K. M. Bob Van Hout Li Sun Qing Zhao Bapi Pradhan Johan Hofkens Elke Debroye |
| author_facet | Donato Valli Roel Vanden Brande Vincent Herreman Qianrui Li Giacomo Romolini Jim Jui‐Kai Chen Muhammed Shameem K. M. Bob Van Hout Li Sun Qing Zhao Bapi Pradhan Johan Hofkens Elke Debroye |
| author_sort | Donato Valli |
| collection | DOAJ |
| description | Semiconductor materials capable of broadband photodetection, spanning X‐rays to near‐infrared (NIR), are essential for applications in medical imaging, industrial inspection, security, and telecommunications. Conventional photodetectors like Si, Ge, InGaAs, and amorphous Se (a‐Se) often encounter tradeoffs in efficiency or cost‐effectiveness. Halide perovskites (HPs) offer competitive or superior optoelectronic properties with low‐cost, solution‐based processing. However, lead‐based HPs pose toxicity and stability challenges, while lead‐free tin‐based HPs suffer from Sn2+ oxidation and structural degradation. The lead‐free double perovskite Cs2AgBiBr6 has emerged as a stable, nontoxic alternative for X‐ray and visible‐light photodetection. Despite its advantages, its high bandgap (≈1.9 eV) limits NIR absorption. This study explores doping Cs2AgBiBr6 with noble metal cations (Au3+, Pd2+, and Ir3+) to lower its absorption onset and enhance its photodetection capabilities across a broad spectrum. The results demonstrate that noble metal doping can overcome the intrinsic limitations of pristine Cs2AgBiBr6, enabling efficient photodetection from X‐rays to the NIR range. This approach highlights a viable pathway for developing next‐generation broadband photodetectors that combine nontoxicity, stability, and wide‐spectrum sensitivity. |
| format | Article |
| id | doaj-art-e203823003d940b3a044fa433c4df107 |
| institution | DOAJ |
| issn | 2688-4046 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Science |
| spelling | doaj-art-e203823003d940b3a044fa433c4df1072025-08-20T03:04:01ZengWiley-VCHSmall Science2688-40462025-08-0158n/an/a10.1002/smsc.202500135Noble Metals Doping in Lead‐Free Double Perovskite Single Crystals: Achieving Near‐Infrared to X‐ray Broadband PhotodetectionDonato Valli0Roel Vanden Brande1Vincent Herreman2Qianrui Li3Giacomo Romolini4Jim Jui‐Kai Chen5Muhammed Shameem K. M.6Bob Van Hout7Li Sun8Qing Zhao9Bapi Pradhan10Johan Hofkens11Elke Debroye12Department of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumDepartment of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumDepartment of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumDepartment of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumDepartment of Chemistry University of Copenhagen Universitetsparken 5 DK‐2100 Copenhagen DenmarkDepartment of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumDepartment of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumDepartment of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumCixi Institute of Biomedical Engineering Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. ChinaSchool of Physics Peking University Beijing 100871 ChinaDepartment of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumDepartment of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumDepartment of Chemistry KU Leuven Celestijnenlaan 200F Heverlee 3001 BelgiumSemiconductor materials capable of broadband photodetection, spanning X‐rays to near‐infrared (NIR), are essential for applications in medical imaging, industrial inspection, security, and telecommunications. Conventional photodetectors like Si, Ge, InGaAs, and amorphous Se (a‐Se) often encounter tradeoffs in efficiency or cost‐effectiveness. Halide perovskites (HPs) offer competitive or superior optoelectronic properties with low‐cost, solution‐based processing. However, lead‐based HPs pose toxicity and stability challenges, while lead‐free tin‐based HPs suffer from Sn2+ oxidation and structural degradation. The lead‐free double perovskite Cs2AgBiBr6 has emerged as a stable, nontoxic alternative for X‐ray and visible‐light photodetection. Despite its advantages, its high bandgap (≈1.9 eV) limits NIR absorption. This study explores doping Cs2AgBiBr6 with noble metal cations (Au3+, Pd2+, and Ir3+) to lower its absorption onset and enhance its photodetection capabilities across a broad spectrum. The results demonstrate that noble metal doping can overcome the intrinsic limitations of pristine Cs2AgBiBr6, enabling efficient photodetection from X‐rays to the NIR range. This approach highlights a viable pathway for developing next‐generation broadband photodetectors that combine nontoxicity, stability, and wide‐spectrum sensitivity.https://doi.org/10.1002/smsc.202500135Cs2AgBiBr6dopinglead‐free perovskitesnear-infraredphotodetectorsX‐rays |
| spellingShingle | Donato Valli Roel Vanden Brande Vincent Herreman Qianrui Li Giacomo Romolini Jim Jui‐Kai Chen Muhammed Shameem K. M. Bob Van Hout Li Sun Qing Zhao Bapi Pradhan Johan Hofkens Elke Debroye Noble Metals Doping in Lead‐Free Double Perovskite Single Crystals: Achieving Near‐Infrared to X‐ray Broadband Photodetection Small Science Cs2AgBiBr6 doping lead‐free perovskites near-infrared photodetectors X‐rays |
| title | Noble Metals Doping in Lead‐Free Double Perovskite Single Crystals: Achieving Near‐Infrared to X‐ray Broadband Photodetection |
| title_full | Noble Metals Doping in Lead‐Free Double Perovskite Single Crystals: Achieving Near‐Infrared to X‐ray Broadband Photodetection |
| title_fullStr | Noble Metals Doping in Lead‐Free Double Perovskite Single Crystals: Achieving Near‐Infrared to X‐ray Broadband Photodetection |
| title_full_unstemmed | Noble Metals Doping in Lead‐Free Double Perovskite Single Crystals: Achieving Near‐Infrared to X‐ray Broadband Photodetection |
| title_short | Noble Metals Doping in Lead‐Free Double Perovskite Single Crystals: Achieving Near‐Infrared to X‐ray Broadband Photodetection |
| title_sort | noble metals doping in lead free double perovskite single crystals achieving near infrared to x ray broadband photodetection |
| topic | Cs2AgBiBr6 doping lead‐free perovskites near-infrared photodetectors X‐rays |
| url | https://doi.org/10.1002/smsc.202500135 |
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