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Crystals
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Advances in Halide Perovskites
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Advances in Halide Perovskites

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Materials for Energy Applications".

Deadline for manuscript submissions: closed (20 June 2024) | Viewed by 1913

Special Issue Editors

Dr. Jérémy Hieulle

E-Mail Website
Guest Editor
Department of Physics and Materials Science, University of Luxembourg, Luxembourg City L-1511, Luxembourg
Interests: perovskite materials; material characterization; nanotechnology; surface characterization; nanomaterials; thin-film deposition; scanning probe microscopy; x-ray photoelectron spectroscopy
Special Issues, Collections and Topics in MDPI journals
Dr. Zonghao Liu

E-Mail Website
Guest Editor
Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan, China
Interests: perovskite solar cells; perovskite optoelectronic devices

Special Issue Information

Dear Colleagues,

Organic–inorganic halide perovskite materials have experienced tremendous interest from the research community due to their easy fabrication process and high-power conversion efficiency (PCE). Compared to silicon technology, perovskites have the potential to be employed on flexible substrates and semi-transparent windows, areas where silicon is absent. In less than 15 years, the best perovskite solar cell devices have passed the benchmark of 25.8% PCE, making this emerging technology competitive with conventional silicon cells. Efficiency is not the main challenge anymore in perovskite materials; the research community is now slowly shifting toward a more fundamental and crucial question, which is: “How to build perovskite cells with long-term stability”? In order to facilitate the commercialization of perovskite solar cells, their stability needs to be improved to compete with other technology on the market. In this Special Issue of Crystals, we would like to collect some pioneering works in the field that investigate innovative approaches to increase the stability of perovskite absorbers, such as material composition, halide and cation mixing, surface passivation, interface layers, 2D perovskites, crystal structure and orientation, and more.

Dr. Jérémy Hieulle
Dr. Zonghao Liu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • perovskite
  • long-term stability
  • surface passivation
  • 2D perovskite
  • halide mixing and cation mixing
  • crystal orientation

Published Papers (2 papers)

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Research

11 pages, 2495 KiB  
Article
Photophysical Properties, Stability and Microstructures of Temperature-Dependent Evolution of Methylammonium Lead Bromide Perovskite
by Yuming Lai, Lin Ma, Shi Zheng, Xiao Li, Shuangyu Cai and Hai Chang
Crystals 2024, 14(7), 589; https://doi.org/10.3390/cryst14070589 - 27 Jun 2024
Viewed by 351
Abstract
Organic/inorganic hybrid perovskite materials, such as CH3NH3PbX3 (X = I, Br), have attracted the attention of the scientific community due to their excellent properties such as a widely tunable bandgap, high optical absorption coefficient, excellent power [...] Read more.
Organic/inorganic hybrid perovskite materials, such as CH3NH3PbX3 (X = I, Br), have attracted the attention of the scientific community due to their excellent properties such as a widely tunable bandgap, high optical absorption coefficient, excellent power conversion efficiency, etc. The exposure of perovskite solar cells and photovoltaic devices to heat can significantly degrade their performance. Therefore, elucidating their temperature-dependent optical properties is essential for performance optimization of perovskite solar cells. We synthesized CH3NH3PbBr3 (MAPbBr3) single crystals through the polymer-controlled nucleation route and investigated the optical properties and molecular structure evolution of them with temperature. Through temperature evolution photoluminescence (PL) spectroscopy, we found that the fluorescence intensity was greatly affected by increasing the temperature, with an asymmetric PL profile suggesting that more captured excitons undergo radiative complexation. The optical photographs showed that the color of MAPbBr3 single crystals faded. Raman spectroscopy revealed that during the heating process, the structure of MAPbBr3 was still preserved at 90 °C since all of the Raman bands were very clear. When the temperature increased to 120 °C, the Raman bands of the internal modes became very weak. On further heating, the inorganic framework on sample’s surface started to disintegrate above 210 °C. During the heating process, the PL spectra exhibited significant changes in spectral intensity, peak position and Full Width Half Maximum (FWHM). The PL spectral intensity decreased abruptly with increasing temperature. The peak position was blue shifted with increasing temperature, and the peak shape showed an obvious asymmetry. The FMWH of the PL spectra was gradually broadened with the increase in the temperature, and there was a sharp increase from 270 °C to 300 °C. These variations in the PL spectra with temperature indicate that the optical properties of MAPbBr3 are greatly affected by temperature, which in turn affects the application of MAPbBr3 in fields such as optical devices. These results may be instructive for the application of MAPbBr3. Full article
(This article belongs to the Special Issue Advances in Halide Perovskites)
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13 pages, 15465 KiB  
Article
Lead-Free Organic Manganese (II) Bromide Hybrid with Highly Efficient and Stable Green Emission for UV Photodetection
by Ye Tian, Qilin Wei, Lian Duan and Chengyu Peng
Crystals 2023, 13(12), 1678; https://doi.org/10.3390/cryst13121678 - 12 Dec 2023
Viewed by 1274
Abstract
Lead halide perovskites have been widely used in optoelectronic devices due to their excellent properties; however, the toxicity of lead and the poor stability of these perovskites hinder their further application. Herein, we report a zero-dimensional (0D) lead-free organic manganese (II) bromide hybrid [...] Read more.
Lead halide perovskites have been widely used in optoelectronic devices due to their excellent properties; however, the toxicity of lead and the poor stability of these perovskites hinder their further application. Herein, we report a zero-dimensional (0D) lead-free organic manganese (II) bromide hybrid compound of (TBA)2MnBr4 (TBA+ = tetrabutylammonium cation) single crystals (SCs) with great environmental stability. The (TBA)2MnBr4 SCs show a strong green emission peak at 518 nm with a high photoluminescence quantum yield (PLQY) of 84.98% at room temperature, which is attributed to the d-d transition of single Mn2+ ions, as also confirmed through density functional calculation. A green light-emitting diode was produced based on (TBA)2MnBr4 SCs, which exhibited CIE coordinates (0.17, 0.69) close to those of standard green. A photodetector fabricated by the (TBA)2MnBr4 SCs shows an obvious photo response with a rapid millisecond rise/decay response time (at 365 nm). Our findings promote the research of Mn(II)-based organic–inorganic hybrid materials and pave the way by using these materials for future high-performance optoelectronic devices. Full article
(This article belongs to the Special Issue Advances in Halide Perovskites)
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