Quasi-2D DJ type perovskites theoretically offer excellent properties for X-ray detection, but they often face issues such as phase segregation and small crystal size. In this study, we synthesized large single crystals of quasi-2D DJ type perovskite (3AMPY)(MA)PbBr using temperature-controlled crystallization. The resulting X-ray detector exhibited high resistivity (1.78 × 10 Ω cm), a carrier mobility-lifetime () product of 9.32 × 10 cm V, a dark current of 5.6 × 10 A cm V, and a sensitivity of 129.86 μC Gy cm. These results demonstrate the potential of quasi-2D DJ type perovskites for high-performance X-ray detection and provide insights into improving crystal growth for optoelectronic applications.
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http://dx.doi.org/10.1039/d4cc06234e | DOI Listing |
ACS Appl Mater Interfaces
January 2025
Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Korea.
The field of perovskite optoelectronics and electronics has rapidly advanced, driven by excellent material properties and a diverse range of fabrication methods available. Among them, triple-cation perovskites such as CsFAMAPbI offer enhanced stability and superior performance, making them ideal candidates for advanced applications. However, the multicomponent nature of these perovskites introduces complexity, particularly in how their structural, optical, and electrical properties are influenced by thermal annealing─a critical step for achieving high-quality thin films.
View Article and Find Full Text PDFACS Nano
January 2025
Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
Metal nanocatalysts supported on oxide scaffolds have been widely used in energy storage and conversion reactions. So far, the main research is still focused on the growth, density, size, and activity enhancement of exsolved nanoparticles (NPs). However, the lack of precise regulation of the type and composition of NPs elements under reduction conditions has restricted the architectural development of in situ exsolution systems.
View Article and Find Full Text PDFChem Commun (Camb)
January 2025
Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.
Nat Commun
December 2024
Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian, China.
Highly efficient perovskite solar cells (PSCs) in the n-i-p structure have demonstrated limited operational lifetimes, primarily due to the layer-to-layer ion diffusion in the perovskite/doped hole-transport layer (HTL) heterojunction, leading to conductivity drop in HTL and component loss in perovskite. Herein, we introduce an ultrathin (~7 nm) p-type polymeric interlayer (D18) with excellent ion-blocking ability between perovskite and HTL to address these issues. The ultrathin D18 interlayer effectively inhibits the layer-to-layer diffusion of lithium, methylammonium, formamidium, and iodide ions.
View Article and Find Full Text PDFChem Sci
December 2024
College of Chemistry and Chemical Engineering, Chongqing University Chongqing 401331 China
Oxygen vacancies in Ruddlesden-Popper (RP) perovskites (PV) [AO][ABO] play a pivotal role in engineering functional properties and thus understanding the relationship between oxygen-vacancy distribution and physical properties can open up new strategies for fine manipulation of structure-driven functionalities. However, the structural origin of preferential distribution for oxygen vacancies in RP structures is not well understood, notably in the single-layer ( = 1) RP-structure. Herein, the = 1 RP phase SrNdZnO was rationally designed and structurally characterized by combining three-dimensional (3D) electron diffraction and neutron powder diffraction.
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