Nanostructured Perovskites—Material, Physics and Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (10 May 2022) | Viewed by 3740

Special Issue Editor

South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Interests: perovskite PV/light emitting materials;2D materials;quantum dots;etc

Special Issue Information

Dear Colleagues,

Perovskites have recently emerged as promising materials for many applications, ranging from solar cells to light-emitting diodes, lasers, photodetectors, memristor, photocatalysis, etc. Delicate material engineering at the nanoscale may be the key to further boosting the efficiencies of perovskite-based devices. This may include nanostructure size control, surface passivation, defect engineering, band alignment, etc. Concomitantly, understanding the physics of perovskites at the nanoscale will be of paramount importance for further design of nanostructure and optimization of device performance. For example, how the electron and lattice/defects interact with the perovskite nanocrystal/quantum dot is critical for electron transport and recombination, which is yet still elusive. 

This Special Issue of Nanomaterials will attempt to cover the most recent advances in “Nanostructured Perovskites—Material, Physics and Applications”. We welcome the submission of manuscripts that focus on the fabrication of perovskite nanostructures, their physics, as well as novel applications based on them. 

Dr. Bo Wu
Guest Editor

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Keywords

  • perovskite
  • nanostructure
  • applications

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Published Papers (1 paper)

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Research

13 pages, 3741 KiB  
Article
Dimension-Dependent Bandgap Narrowing and Metallization in Lead-Free Halide Perovskite Cs3Bi2X9 (X = I, Br, and Cl) under High Pressure
by Guangbiao Xiang, Yanwen Wu, Man Zhang, Chen Cheng, Jiancai Leng and Hong Ma
Nanomaterials 2021, 11(10), 2712; https://doi.org/10.3390/nano11102712 - 14 Oct 2021
Cited by 17 | Viewed by 3386
Abstract
Low-toxicity, air-stable cesium bismuth iodide Cs3Bi2X9 (X = I, Br, and Cl) perovskites are gaining substantial attention owing to their excellent potential in photoelectric and photovoltaic applications. In this work, the lattice constants, band structures, density of states, [...] Read more.
Low-toxicity, air-stable cesium bismuth iodide Cs3Bi2X9 (X = I, Br, and Cl) perovskites are gaining substantial attention owing to their excellent potential in photoelectric and photovoltaic applications. In this work, the lattice constants, band structures, density of states, and optical properties of the Cs3Bi2X9 under high pressure perovskites are theoretically studied using the density functional theory. The calculated results show that the changes in the bandgap of the zero-dimensional Cs3Bi2I9, one-dimensional Cs3Bi2Cl9, and two-dimensional Cs3Bi2Br9 perovskites are 3.05, 1.95, and 2.39 eV under a pressure change from 0 to 40 GPa, respectively. Furthermore, it was found that the optimal bandgaps of the Shockley–Queisser theory for the Cs3Bi2I9, Cs3Bi2Br9, and Cs3Bi2Cl9 perovskites can be reached at 2–3, 21–26, and 25–29 GPa, respectively. The Cs3Bi2I9 perovskite was found to transform from a semiconductor into a metal at a pressure of 17.3 GPa. The lattice constants, unit-cell volume, and bandgaps of the Cs3Bi2X9 perovskites exhibit a strong dependence on dimension. Additionally, the Cs3Bi2X9 perovskites have large absorption coefficients in the visible region, and their absorption coefficients undergo a redshift with increasing pressure. The theoretical calculation results obtained in this work strengthen the fundamental understanding of the structures and bandgaps of Cs3Bi2X9 perovskites at high pressures, providing a theoretical support for the design of materials under high pressure. Full article
(This article belongs to the Special Issue Nanostructured Perovskites—Material, Physics and Applications)
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