Atomically Resolved Quantum-Confined Electronic Structures at Organic-Inorganic Interfaces of Two-Dimensional Ruddlesden-Popper Halide Perovskites

Min Chuan Shih, Hung Chang Hsu, Cheng Chieh Lin, Shao Ku Huang, Tzu Pei Chen, Yung Han Tsai, Chia Chun Chen, Ya Ping Chiu*, Chun Wei Chen

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

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
頁(從 - 到)8066-8072
頁數7
期刊Nano Letters
21
發行號19
DOIs
出版狀態已發佈 - 2021 十月 13
對外發佈

ASJC Scopus subject areas

  • 生物工程
  • 化學 (全部)
  • 材料科學(全部)
  • 凝聚態物理學
  • 機械工業

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