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| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
MAT.P-337 |
| Subject |
Dimensionality-Controlled Hybrid Perovskite for High Stability and Detectivity Photodetector |
| Authors |
Ju Won Lim, Dong Ha Kim*
Department of Chemistry and Nano Science, Ewha Womans University, Korea
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| Abstract |
In this work, we utilized reduced-dimensionality (Quasi-2D) perovskite films to photoconductive photodetectors by manipulating conventional three-dimensional perovskite materials for the first time. Quasi-2D perovskite films were systematically developed to obtain lessen dark current leakage and improved stability while retaining the comparable electrical performance of conventional three-dimensional perovskites. The quasi-2D perovskite photodetector exhibited a dark current of 1.76 x 10-7 A/cm2, resulting in the improved detectivity of 2.20 x 1012 J at the voltage of 0 V compared to conventional perovskite. More notably, quasi-2D perovskite not only showed excellent performance but also had remarkable stability. The current density of quasi-2D perovskite photodetector maintained 76 % while three-dimensional perovskite photodetector remained only 15 % of initial level after 2000 hours. To confirm the improved stability of quasi-2D perovskite, X-ray diffraction (XRD) and atomic force microscope (AFM) measurement were also carried out. After 2000 hours, only a few pinholes were observed in quasi-2D perovskite films while considerable serious deformations were found in three-dimensional perovskite. Our study suggests solving the poor stability of the three-dimensional perovskite, with a potential for the developing highly-stable perovskite optoelectronics. |
| E-mail |
limjw0319@gmail.com |
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121st General Meeting of the KCS