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

Min-Chuan Shih | Zendy; Hung-Chang Hsu | Zendy; ChengChieh Lin | Zendy; S.-H. Huang | Zendy; Tzu-Pei Chen | Zendy; Yung-Han Tsai | Zendy; ChiaChun Chen | Zendy; YaPing Chiu | Zendy; ChunWei Chen | Zendy

Open Access

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

Author(s) -

Min-Chuan Shih,

Hung-Chang Hsu,

ChengChieh Lin,

S.-H. Huang,

Tzu-Pei Chen,

Yung-Han Tsai,

ChiaChun Chen,

YaPing Chiu,

ChunWei Chen

Publication year - 2021

Publication title -

nano letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.853

H-Index - 488

eISSN - 1530-6992

pISSN - 1530-6984

DOI - 10.1021/acs.nanolett.1c02409

Subject(s) - scanning tunneling microscope , heterojunction , materials science , band gap , chemical physics , perovskite (structure) , electronic structure , scanning tunneling spectroscopy , electronic band structure , quantum tunnelling , halide , condensed matter physics , nanotechnology , chemistry , crystallography , optoelectronics , inorganic chemistry , physics

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.

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