The Effect of Cs-Controlled Triple-Cation Perovskite on Improving the Sensing Performance of Deep-Ultraviolet Photodetectors
In this study, a UVC photodetector (PD) was fabricated by incorporating CsI into a conventional double-cation perovskite (FAMAPbI<sub>3</sub>) to enhance its stability. The device utilized a methylammonium iodide post-treatment solution to fabricate CsFAMAPbI<sub>3</sub> pero...
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MDPI AG
2025-07-01
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| author | Jun Seo Kim Sangmo Kim Hyung Wook Choi |
| author_facet | Jun Seo Kim Sangmo Kim Hyung Wook Choi |
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| description | In this study, a UVC photodetector (PD) was fabricated by incorporating CsI into a conventional double-cation perovskite (FAMAPbI<sub>3</sub>) to enhance its stability. The device utilized a methylammonium iodide post-treatment solution to fabricate CsFAMAPbI<sub>3</sub> perovskite thin films, which functioned as the primary light-absorbing layer in an NIP structure composed of n-type SnO<sub>2</sub> and p-type spiro-OMeTAD. Perovskite films were fabricated and analyzed as a function of the Cs concentration to optimize the Cs content. The results demonstrated that Cs doping improved the crystallinity and phase stability of the films, leading to their enhanced electron mobility and photodetection performance. The UVC PD with an optimum Cs concentration exhibited a responsivity of 58.2 mA/W and a detectivity of 3.52 × 10<sup>14</sup> Jones, representing an approximately 7% improvement over conventional structures. |
| format | Article |
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| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-8d9eaec3fa3e4bd4b5c30cb0f4f15e8a2025-08-20T03:13:41ZengMDPI AGApplied Sciences2076-34172025-07-011514798210.3390/app15147982The Effect of Cs-Controlled Triple-Cation Perovskite on Improving the Sensing Performance of Deep-Ultraviolet PhotodetectorsJun Seo Kim0Sangmo Kim1Hyung Wook Choi2Department of Electrical Engineering, Gachon University, Seongnam 13120, Republic of KoreaResearch and Development, One Tech. Incorporation, Seongnam 13120, Republic of KoreaDepartment of Electrical Engineering, Gachon University, Seongnam 13120, Republic of KoreaIn this study, a UVC photodetector (PD) was fabricated by incorporating CsI into a conventional double-cation perovskite (FAMAPbI<sub>3</sub>) to enhance its stability. The device utilized a methylammonium iodide post-treatment solution to fabricate CsFAMAPbI<sub>3</sub> perovskite thin films, which functioned as the primary light-absorbing layer in an NIP structure composed of n-type SnO<sub>2</sub> and p-type spiro-OMeTAD. Perovskite films were fabricated and analyzed as a function of the Cs concentration to optimize the Cs content. The results demonstrated that Cs doping improved the crystallinity and phase stability of the films, leading to their enhanced electron mobility and photodetection performance. The UVC PD with an optimum Cs concentration exhibited a responsivity of 58.2 mA/W and a detectivity of 3.52 × 10<sup>14</sup> Jones, representing an approximately 7% improvement over conventional structures.https://www.mdpi.com/2076-3417/15/14/7982deep-ultravioletphotodetectorsperovskiteCsFAMAPbI<sub>3</sub>CsI |
| spellingShingle | Jun Seo Kim Sangmo Kim Hyung Wook Choi The Effect of Cs-Controlled Triple-Cation Perovskite on Improving the Sensing Performance of Deep-Ultraviolet Photodetectors Applied Sciences deep-ultraviolet photodetectors perovskite CsFAMAPbI<sub>3</sub> CsI |
| title | The Effect of Cs-Controlled Triple-Cation Perovskite on Improving the Sensing Performance of Deep-Ultraviolet Photodetectors |
| title_full | The Effect of Cs-Controlled Triple-Cation Perovskite on Improving the Sensing Performance of Deep-Ultraviolet Photodetectors |
| title_fullStr | The Effect of Cs-Controlled Triple-Cation Perovskite on Improving the Sensing Performance of Deep-Ultraviolet Photodetectors |
| title_full_unstemmed | The Effect of Cs-Controlled Triple-Cation Perovskite on Improving the Sensing Performance of Deep-Ultraviolet Photodetectors |
| title_short | The Effect of Cs-Controlled Triple-Cation Perovskite on Improving the Sensing Performance of Deep-Ultraviolet Photodetectors |
| title_sort | effect of cs controlled triple cation perovskite on improving the sensing performance of deep ultraviolet photodetectors |
| topic | deep-ultraviolet photodetectors perovskite CsFAMAPbI<sub>3</sub> CsI |
| url | https://www.mdpi.com/2076-3417/15/14/7982 |
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