Unveiling the Role of Cesium in Halide Perovskite Single Crystal for Stable and Ultrasensitive X‐Ray Detection

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Abstract Metal halide perovskites have been demonstrated to be the promising X‐ray detection materials, among which MAPbI 3 is expected for high‐performance large‐area detector integration due its strong absorption and solution processible at low temperature industrial‐grade large‐size single crystal (SC). However, commercial viability of SC detectors remains challenging poor intrinsic stability, large dark current, significant ion migration. Herein, inorganic Cs + ions are designed incorporate into effects on structure, defect state, band migration, carrier transport in SCs systematically unveiled. The experimental results show that incorporation reduces density, inhibits improves mobility, increases resistivity. Therefore, fabricated with high sensitivity 49847 µC Gy −1 cm −2 , limit 3.1 nGy s short response raise time 150 µs, superior long‐term operating stability under continuous irradiation bias. rare combination these figure merits enables achieve high‐definition imaging, confirming this work provides a new strategy designing stable sensitive detectors.

Language: Английский

Solvent Engineering and Molecular Doping Synergistically Boost CsPbIBr2 Solar Cell Efficiency

Coatings, Journal Year: 2025, Volume and Issue: 15(4), P. 448 - 448

Published: April 10, 2025

Perovskite solar cells have garnered significant attention due to their outstanding optoelectronic properties, ease of fabrication, and cost-effectiveness, making them a promising candidate for next-generation photovoltaic technologies. However, CsPbIBr2-based perovskites currently face critical challenges regarding limited efficiency relatively poor long-term stability, hindering broader commercial applications. In this study, we systematically investigated the morphological effects induced by different solvents, including dimethylformamide (DMF), N-methyl-2-pyrrolidone (NMP), dimethyl sulfoxide (DMSO), on formation characteristics lead bromide (PbBr2) complexes. Further optimization was achieved through innovative incorporation trimesoyl chloride (TMC) doping into perovskite precursor solution. The optimized solution subsequently processed using spin-coating annealing method, resulting in high-quality CsPbIBr2 thin films with improved properties. experimental results demonstrated remarkable enhancement power conversion (PCE), an increase from initial value 6.2% up 10.2%. Furthermore, exhibited excellent maintaining over 80% after continuous aging 250 h ambient air conditions. This study presents effective strategy controlled compositional engineering wide-bandgap materials, providing step forward advancement technology.

Language: Английский