https://scholars.lib.ntu.edu.tw/handle/123456789/632951
標題: | Interplay of field-induced molecular dipole alignment and compensating surface polarization in low-temperature P-V hysteresis of MAPbBr3(001) | 作者: | Freter, Lars Hsu, Hung Chang Sankar, Raman CHUN-WEI CHEN Dunin-Borkowski, Rafal E. Ebert, Philipp YA-PING CHIU Schnedler, Michael |
關鍵字: | PEROVSKITE SOLAR-CELLS; LEAD HALIDE PEROVSKITE; TUNNELING SPECTROSCOPY; ION MIGRATION; CH3NH3PBI3; QUANTIFICATION; DIFFUSION; EFFICIENT; BR | 公開日期: | 1-五月-2023 | 出版社: | AMER PHYSICAL SOC | 卷: | 7 | 期: | 5 | 來源出版物: | Physical Review Materials | 摘要: | We demonstrate the presence of a hysteresis in tunneling spectra acquired at 4.3 K on cleaved MA-Br terminated (001) surfaces of MAPbBr3 single crystals. Simulations of the tunneling spectra reveal an underlying polarization-voltage (P-V) hysteresis, which is caused by an interplay of subsurface field-induced rotation and alignment of the MA molecules, stabilized by dipole-dipole interactions, and an ion-lattice relaxation. The resulting subsurface polarization is counteracted by a compensating surface polarization, detectable by surface-sensitive tunneling spectroscopy. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/632951 | ISSN: | 2475-9953 | DOI: | 10.1103/PhysRevMaterials.7.L052401 |
顯示於: | 材料科學與工程學系 |
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