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A machine learning-designed "supramolecular armor" imparts exceptional stability to perovskite quantum dots. A guanidinium crosslinker reinforces a β-cyclodextrin layer, creating a robust yet permeable interface that enables direct contact sensing in challenging aqueous environments.
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http://dx.doi.org/10.1039/d5cc04384k | DOI Listing |
J Chem Phys
September 2025
Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-Ku, Yokohama 236-0027, Kanagawa, Japan.
Perovskite-silicon tandem solar cells have attracted considerable attention owing to their high power conversion efficiency (PCE), which exceeds the limits of single-junction devices. This study focused on lead-free tin-based perovskites with iodine-bromine mixed anions. Bromide perovskites have a wide bandgap; therefore, they are promising light absorbers for perovskite-silicon tandem solar cells.
View Article and Find Full Text PDFJ Phys Chem Lett
September 2025
Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan 250014, P.R. China.
Metal halide perovskites have garnered significant attention due to their exceptional photoelectric properties. The alkali metal doping strategy has been demonstrated to effectively modulate grain size, control crystallization kinetics, and adjust band gap characteristics in perovskite. This study employs the first-principles calculations to reveal that the selection of alkali metal species and their corresponding doping methodologies exert markedly distinct influences on both the electronic properties and ion migration kinetics of CsPbBr perovskites.
View Article and Find Full Text PDFJ Phys Chem Lett
September 2025
School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute Jatni, Khurda, Bhubaneswar 752050, Odisha, India.
Quantum-confined perovskites represent an emerging class of materials with great potential for optoelectronic applications. Specifically, zero-dimensional (0D) perovskites have garnered significant attention for their unique excitonic properties. However, achieving phase-pure, size-tunable 0D perovskite materials and gaining a clear understanding of their photophysical behavior remains challenging.
View Article and Find Full Text PDFACS Appl Mater Interfaces
September 2025
State Key Laboratory of Chemical Resource Engineering, Beijing 100029, China.
Circularly polarized luminescence (CPL) has emerged as a critical technology for anticounterfeiting and optical display applications due to its unique chiroptical properties. We report a multicolor CPL-emitting elastomeric film (P37/PSK@SiO-PDMS) that synergistically combines chiral helical polyacetylene (P37) and a surface-engineered perovskite (PSK@SiO) through hydrogen-bond-directed assembly. Confinement within the PDMS matrix drives P37 to self-assemble into a chiral supramolecular structure through hydrogen bonding, inducing a chiroptical inversion.
View Article and Find Full Text PDFChem Commun (Camb)
September 2025
College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, P. R. China.
A machine learning-designed "supramolecular armor" imparts exceptional stability to perovskite quantum dots. A guanidinium crosslinker reinforces a β-cyclodextrin layer, creating a robust yet permeable interface that enables direct contact sensing in challenging aqueous environments.
View Article and Find Full Text PDF