https://scholars.lib.ntu.edu.tw/handle/123456789/598368
標題: | Atomically Resolved Quantum-Confined Electronic Structures at Organic-Inorganic Interfaces of Two-Dimensional Ruddlesden-Popper Halide Perovskites | 作者: | Shih M.-C Hsu H.-C Lin C.-C Huang S.-K Chen T.-P Tsai Y.-H Chen C.-C Chiu Y.-P CHUN-WEI CHEN YA-PING CHIU |
關鍵字: | organic-inorganic interface;quantum-well electronic structure;scanning tunneling microscopy;two-dimensional perovskites;Energy gap;Heterojunctions;organic-inorganic materials;Perovskite;Scanning tunneling microscopy;Semiconductor quantum wells;Visualization;Direct visualization;Electronic.structure;Halide perovskites;Organic-inorganic interface;Organic/inorganic;Quantum-well electronic structure;Quantum-wells;Ruddlesden-Popper;Two-dimensional;Two-dimensional perovskite;Electronic structure | 公開日期: | 2021 | 卷: | 21 | 期: | 19 | 起(迄)頁: | 8066-8072 | 來源出版物: | Nano Letters | 摘要: | This work demonstrates the direct visualization of atomically resolved quantum-confined electronic structures at organic-inorganic heterointerfaces of two-dimensional (2D) organic-inorganic hybrid Ruddlesden-Popper perovskites (RPPs); this is accomplished with scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) by using solvent engineering to prepare perpendicularly oriented 2D RPPs. Atomically resolved band mapping images across the organic-inorganic interfaces of 2D RPPs yield typical quantum-well-like type-I heterojunction band alignment with band gaps depending on the thicknesses or n values of the inorganic perovskite slabs. The presence of edge states within the band gap due to organic cation vacancies is also observed. In addition, real-space visualization of atomic-scale structural phase transition behavior and changes in local electronic band structures are obtained simultaneously. Our results provide an unequivocal observation and explanation of the quantum-confined electronic structures formed at organic-inorganic interfaces of 2D RPPs. ? 2021 The Authors. Published by American Chemical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117070376&doi=10.1021%2facs.nanolett.1c02409&partnerID=40&md5=44c7ad90c4dae06fcbd5ed8a27fae1cf https://scholars.lib.ntu.edu.tw/handle/123456789/598368 |
ISSN: | 15306984 | DOI: | 10.1021/acs.nanolett.1c02409 |
顯示於: | 材料科學與工程學系 |
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