Results 91 to 100 of about 1,456,910 (261)

An Examination of the Cs2NaInCl6 Luminescence: Interplay of Self‐Generated In+ and Doped Sb3+, Er3+/Yb3+ Ions

Advanced Optical Materials, EarlyView.
A new luminescence mechanism in Cs2NaInCl₆ is revealed through spontaneously formed In3+→In+ centers and Er3+/Yb3+/Sb3+ doping. Tunable visible, near‐infrared, downconversion, and upconversion emissions are demonstrated, while DFT calculations explain the electronic structure.
Inna A. Ivashchenko, Alicja Szymska‐Szymanik, Lubomir D. Gulay, Alexander Eich, Galina Gurieva, Susan Schorr, Karina V. Lamonova, Marcin Nyk, Malgorzata Makowska‐Janusik, Benjamin González‐Diaze, Katarzyna Matras‐Postołek   +10 more
wiley   +1 more source

Crossover From Excitonic to Bulk Emission in Metal Halide Perovskite Nanocomposites

Advanced Optical Materials, EarlyView.
A transition from excitonic to free‐charge recombination is uncovered in perovskite nanocomposites as a function of nanostructure size using PLQY(R, F) mapping as a function of excitation fluence (F) and repetition rate (R). These findings demonstrate that PLQY(R, F) mapping serves as a powerful and non‐invasive tool to extract quantitative information
Miriam Minguez‐Avellan, Alexandr Marunchenko, Víctor Sagra‐Rodríguez, Rafael Abargues, Pablo P. Boix, Ivan G. Scheblykin   +5 more
wiley   +1 more source

Pb-free halide perovskites for solar cells, light-emitting diodes, and photocatalysts

, 2022
International audienceMetal halide perovskites have recently emerged as one of the most promising classes of semiconductors for various applications, especially in the field of optoelectronics.
Even, Jacky, Jiang, Pingping, Pedesseau, Laurent, Pingping Jiang, Marios Zacharias, Claudine Katan, Debdipto Acharya, Mikaël Kepenekian, George Volonakis, Acharya, Debdipto, Jacky Even, Volonakis, George, Zacharias, Marios, Laurent Pedesseau, Kepenekian, Mikaël, Katan, Claudine   +15 more
core   +1 more source

Sustainable Materials Design With Multi‐Modal Artificial Intelligence

Advanced Science, EarlyView.
Critical mineral scarcity, high embodied carbon, and persistent pollution from materials processing intensify the need for sustainable materials design. This review frames the problem as multi‐objective optimization under heterogeneous, high‐dimensional evidence and highlights multi‐modal AI as an enabling pathway.
Tianyi Xu, Tianshuo Wei, Yan Ge, Bo Peng, Yue Li, Maolin Wang, Peng Wen, Chao Yang, Ye Wei   +8 more
wiley   +1 more source

Optical time-lapsed in situ mechanochemical studies on metal halide perovskite systems

Nature Communications
Metal halide perovskites are attractive for optoelectronic applications, but the existing solution-based synthetic methods rely on hazardous solvents and lack reproducibility.
Yonghao Xiao, David G. Bradley, Wei Xin Chan, Xinwen Hu, Lian Xiao, Zhenpeng Liu, Zi Yang Tan, Xin Zhao, Chenfei Li, Mansour Sadek, Vikash Kumar Ravi, Ying Hern Tam, Xiaotao Wang, Felipe García, Handong Sun, Seow Chin Low, Poh Boon Phua, Tze Chien Sum, Xiuwen Zhou, Yee-Fun Lim, John V. Hanna, Han Sen Soo   +21 more
doaj   +1 more source

Structural and Compositional Effects on the Scintillation Properties of Fast Emitting Metal‐Organic Frameworks

Advanced Science, EarlyView.
The crystalline structure, the atomic numbers of the constituent elementsand the size of MOF crystals each influence their photoluminescence and scintillation properties in distinct ways. Together, these factors provide valuable guidelines for designing systems with optimized performance and tunable timing characteristics, arising from the synergistic ...
Francesca Cova, Jacopo Perego, Biplab Joarder, Nobuhiro Yanai, Anna Vedda, Silvia Bracco, Angiolina Comotti, Angelo Monguzzi, Irene Villa   +8 more
wiley   +1 more source

Evidence and engineering of x-ray luminescence in lead free perovskite Cs2AgInCl6 with Bi substitutions

APL Materials
Cs2AgInCl6 belongs to the family of lead-free halide double perovskites. Lead-free halide double perovskite appears as a viable contender for scintillator applications due to its inexpensive production costs, low intrinsic trap density, and nanosecond ...
Hassan Siddique
doaj   +1 more source

Accelerated Discovery of Halide Perovskite Materials via Computational Methods: A Review

Nanomaterials
Halide perovskites have gained considerable attention in materials science due to their exceptional optoelectronic properties, including high absorption coefficients, excellent charge-carrier mobilities, and tunable band gaps, which make them highly ...
Ming Sheng, Hui Zhu, Suqin Wang, Zhuang Liu, Guangtao Zhou   +4 more
doaj   +1 more source

Phonon-Limited Mobility and Electron-Phonon Coupling in Lead-Free Halide Double Perovskites

, 2021
International audienceLead-free halide double perovskites have attracted considerable attention as complements to lead-based halide perovskites in a range of optoelectronic applications.
Giustino, Feliciano, Volonakis, George, Leveillee, Joshua   +2 more
core   +1 more source

Flexoelectricity in Photoconversion: Fundamentals, Materials, and Outlooks

Advanced Science, EarlyView.
Mechanical bending of a flexible cantilever induces a strain gradient in the photoactive material. The resulting flexoelectric field couples with photovoltaic and photoconductive effects, modulating charge generation, separation, and collection. A comparative analysis of oxide perovskites, halide perovskites, and two‐dimensional materials is presented,
Xiang Huang, Feng Li, Rongkun Zheng
wiley   +1 more source