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

doi:10.1021/acs.nanolett.1c02409

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^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	8066-8072
Number of pages	7
Journal	Nano Letters
Volume	21
Issue number	19
DOIs	https://doi.org/10.1021/acs.nanolett.1c02409
Publication status	Published - 2021 Oct 13

Keywords

organic-inorganic interface
quantum-well electronic structure
scanning tunneling microscopy
two-dimensional perovskites

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.1c02409

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

abstract = "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.",

keywords = "organic-inorganic interface, quantum-well electronic structure, scanning tunneling microscopy, two-dimensional perovskites",

author = "Shih, {Min Chuan} and Hsu, {Hung Chang} and Lin, {Cheng Chieh} and Huang, {Shao Ku} and Chen, {Tzu Pei} and Tsai, {Yung Han} and Chen, {Chia Chun} and Chiu, {Ya Ping} and Chen, {Chun Wei}",

note = "Publisher Copyright: {\textcopyright} 2021 The Authors. Published by American Chemical Society.",

year = "2021",

month = oct,

day = "13",

doi = "10.1021/acs.nanolett.1c02409",

language = "English",

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AU - Shih, Min Chuan

AU - Hsu, Hung Chang

AU - Lin, Cheng Chieh

AU - Huang, Shao Ku

AU - Chen, Tzu Pei

AU - Tsai, Yung Han

AU - Chen, Chia Chun

AU - Chiu, Ya Ping

AU - Chen, Chun Wei

PY - 2021/10/13

Y1 - 2021/10/13

N2 - 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.

AB - 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.

KW - organic-inorganic interface

KW - quantum-well electronic structure

KW - scanning tunneling microscopy

KW - two-dimensional perovskites

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

Abstract

Keywords

ASJC Scopus subject areas

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