Self‐powered bifunctional perovskite photodetectors with both broadband and narrowband photoresponse
Abstract Photodetectors generally operate exclusively in either the broadband or narrowband. Developing bifunctional photodetectors that can detect photons in both broadband and narrowband would bring significant versatility to the optoelectronic platform. Nevertheless, the design of bifunctional in...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-11-01
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| Series: | InfoMat |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/inf2.12348 |
| _version_ | 1811179438508867584 |
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| author | Wenjie Cheng Wei Tian Fengren Cao Liang Li |
| author_facet | Wenjie Cheng Wei Tian Fengren Cao Liang Li |
| author_sort | Wenjie Cheng |
| collection | DOAJ |
| description | Abstract Photodetectors generally operate exclusively in either the broadband or narrowband. Developing bifunctional photodetectors that can detect photons in both broadband and narrowband would bring significant versatility to the optoelectronic platform. Nevertheless, the design of bifunctional integrated devices remains challenging due to the differentiated strategies with respect to device structure and material combination. Herein, we propose introducing polyvinylpyrrolidone to increase the viscosity of the perovskite precursor solution, which introduces abundant defects and cavities into the perovskite film while maintaining a relatively low film thickness. Then, we use methylamine gas to postprocess the middle area of the film to promote directional recrystallization and densification, thereby realizing narrowband and broadband dual‐function photodetection in a single device at zero bias. Both ends of the film exhibit a near‐infrared peak response at 780 nm with a narrow full‐width at half maximum of approximately 30 nm without an external bias. The middle broadband photodetector exhibits a high responsivity of 329 mA W−1 and EQE up to 52.46% at 780 nm. We make full use of narrow‐band wavelength selective detection and broadband full‐spectrum detection to achieve double encryption during signal transmission. This work represents an important step toward the realization of perovskite‐based multifunctional integrated devices. |
| first_indexed | 2024-04-11T06:35:37Z |
| format | Article |
| id | doaj.art-152d147a8d64490fbdacffa162e4e7c6 |
| institution | Directory Open Access Journal |
| issn | 2567-3165 |
| language | English |
| last_indexed | 2024-04-11T06:35:37Z |
| publishDate | 2022-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | InfoMat |
| spelling | doaj.art-152d147a8d64490fbdacffa162e4e7c62022-12-22T04:39:50ZengWileyInfoMat2567-31652022-11-01411n/an/a10.1002/inf2.12348Self‐powered bifunctional perovskite photodetectors with both broadband and narrowband photoresponseWenjie Cheng0Wei Tian1Fengren Cao2Liang Li3School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films Soochow University Suzhou People's Republic of ChinaSchool of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films Soochow University Suzhou People's Republic of ChinaSchool of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films Soochow University Suzhou People's Republic of ChinaSchool of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films Soochow University Suzhou People's Republic of ChinaAbstract Photodetectors generally operate exclusively in either the broadband or narrowband. Developing bifunctional photodetectors that can detect photons in both broadband and narrowband would bring significant versatility to the optoelectronic platform. Nevertheless, the design of bifunctional integrated devices remains challenging due to the differentiated strategies with respect to device structure and material combination. Herein, we propose introducing polyvinylpyrrolidone to increase the viscosity of the perovskite precursor solution, which introduces abundant defects and cavities into the perovskite film while maintaining a relatively low film thickness. Then, we use methylamine gas to postprocess the middle area of the film to promote directional recrystallization and densification, thereby realizing narrowband and broadband dual‐function photodetection in a single device at zero bias. Both ends of the film exhibit a near‐infrared peak response at 780 nm with a narrow full‐width at half maximum of approximately 30 nm without an external bias. The middle broadband photodetector exhibits a high responsivity of 329 mA W−1 and EQE up to 52.46% at 780 nm. We make full use of narrow‐band wavelength selective detection and broadband full‐spectrum detection to achieve double encryption during signal transmission. This work represents an important step toward the realization of perovskite‐based multifunctional integrated devices.https://doi.org/10.1002/inf2.12348bifunctional devicedouble encryptionnarrow FWHMperovskite photodetector |
| spellingShingle | Wenjie Cheng Wei Tian Fengren Cao Liang Li Self‐powered bifunctional perovskite photodetectors with both broadband and narrowband photoresponse InfoMat bifunctional device double encryption narrow FWHM perovskite photodetector |
| title | Self‐powered bifunctional perovskite photodetectors with both broadband and narrowband photoresponse |
| title_full | Self‐powered bifunctional perovskite photodetectors with both broadband and narrowband photoresponse |
| title_fullStr | Self‐powered bifunctional perovskite photodetectors with both broadband and narrowband photoresponse |
| title_full_unstemmed | Self‐powered bifunctional perovskite photodetectors with both broadband and narrowband photoresponse |
| title_short | Self‐powered bifunctional perovskite photodetectors with both broadband and narrowband photoresponse |
| title_sort | self powered bifunctional perovskite photodetectors with both broadband and narrowband photoresponse |
| topic | bifunctional device double encryption narrow FWHM perovskite photodetector |
| url | https://doi.org/10.1002/inf2.12348 |
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