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.
原文 | 英語 |
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頁(從 - 到) | 8066-8072 |
頁數 | 7 |
期刊 | Nano Letters |
卷 | 21 |
發行號 | 19 |
DOIs | |
出版狀態 | 已發佈 - 2021 10月 13 |
ASJC Scopus subject areas
- 生物工程
- 一般化學
- 一般材料科學
- 凝聚態物理學
- 機械工業