دورية أكاديمية
In Situ Growth of PbS/PbI 2 Heterojunction and Its Photoelectric Properties
| العنوان: | In Situ Growth of PbS/PbI 2 Heterojunction and Its Photoelectric Properties |
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| المؤلفون: | Shangxun Yang, Jun Han, Jin Zhang, Yingxiu Kong, Huan Liu |
| المصدر: | Nanomaterials, Vol 12, Iss 681, p 681 (2022) |
| بيانات النشر: | MDPI AG |
| سنة النشر: | 2022 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | in situ growth, heterojunction, photoresponse, specific detectivity, wide-spectrum detector, Chemistry, QD1-999 |
| الوصف: | In this paper, PbI 2 thin films with a uniform surface morphology and compact structure were prepared by adjusting the spin coating process parameters. On such a basis, the PbS/PbI 2 heterojunction was fabricated on the PbI 2 surface by the method of in situ chemical replacement growth. The results show that the PbS/PbI 2 heterojunction grown by this method has a clear interface and is closely combined. The introduction of a PbS layer enables its spectral response range to cover the visible and near-infrared regions. Compared with the PbI 2 thin film device, its responsivity is increased by three orders of magnitude, its response time reduced by 42%, and its recovery time decreased by nearly 1/2 under 450 nm illumination. In the case that there is no response for the PbI 2 thin film device under 980 nm illumination, the specific detectivity of the PbS/PbI 2 heterojunction device still amounts to 1.8 × 10 8 Jones. This indicates that the in situ chemical replacement is a technique that can construct a high-quality heterojunction in a simple process. PbS/PbI 2 heterojunction fabricated by this method has a visible–near-infrared light detection response range, which provides a new idea for creating visible–near-infrared common-path detection systems. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2079-4991 |
| العلاقة: | https://www.mdpi.com/2079-4991/12/4/681Test; https://doaj.org/toc/2079-4991Test; https://doaj.org/article/ce59b3e1709643caa3ec278c85edf6a3Test |
| DOI: | 10.3390/nano12040681 |
| الإتاحة: | https://doi.org/10.3390/nano12040681Test https://doaj.org/article/ce59b3e1709643caa3ec278c85edf6a3Test |
| رقم الانضمام: | edsbas.996E4AE7 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 20794991 |
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| DOI: | 10.3390/nano12040681 |