Results 21 to 30 of about 151 (135)
Absorption and Emission Spectra of Ce3+ in Elpasolite Lattices [PDF]
Journal of the American Chemical Society, 2003 The experimental determination of the electronic energy levels for Ce(3+) in some chloroelpasolite hosts for both the ground 4f(1) and the excited 5d(1) configurations is described. High-resolution f-f absorption and f-(2)T(2g) d absorption and emission spectra have been recorded at low temperatures for Ce(3+) diluted into various hexachloroelpasolite ...
Tanner, Peter A. +7 more
openaire +3 more sources
Small, Volume 21, Issue 39, October 2, 2025.This article provides a comprehensive review of supercapacitor and photosupercapacitor applications of halide perovskites and their future perspectives. Abstract Supercapacitors have garnered significant research interest as high‐performance energy storage devices, owingto their high power density and excellent recyclability.
Chandra Sekhar Rout +4 more
wiley +1 more source
The Importance of Metal Ion Impurity Bands in the Photoluminescence of Halide Double Perovskites
Advanced Optical Materials, Volume 13, Issue 17, June 17, 2025.Many publications have associated emission spectral features of double perovskite halides in the region at 460–470 nm with “pristine” materials. This leads to not only false observations but also incorrect conclusions concerning the transformation of dark into bright excitons or boosting self‐trapped exciton emission.
Hei‐Yui Kai +4 more
wiley +1 more source
Not Just Another Crystal Field Software
Journal of Computational Chemistry, Volume 46, Issue 6, March 5, 2025.NJA‐CFS is a Python toolkit for crystal field/ligand field calculations on transition metal and lanthanide complexes. It offers various parametrization schemes and tools for CF parameter manipulation and rotation. This manuscript details the theoretical foundations, compares results with experiments and ab initio calculations, and provides intuitive ...
Letizia Fiorucci, Enrico Ravera
wiley +1 more source
The luminescence of arsenic(III) in the cubic elpasolite Cs2NaScCl6
Chemical Physics Letters, 1987 Luminescence spectra and decay time measurements of the 4s2 ion As3+ in CS2NaScCl6 are presented. A dynamical Jahn-Teller effect is observed in the excitation spectrum of the As3+ ion. The luminescence properties of Cs2NaScCl6-As3+ are comparable to those of Cs2NaScCl6-Sb3+ taking into account the differences in ionic radius and spin-orbit coupling ...
Oomen, E.W.J.L. +2 more
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Conduction Band Tuning by Controlled Alloying of Fe into Cs2AgBiBr6 Double Perovskite Powders
Advanced Functional Materials, Volume 34, Issue 50, December 9, 2024.Here, it is shown that controlled alloying of Cs2AgBiBr6 with Fe3+ via mechanochemical synthesis results in a tunable absorption onset between 2.1 and ≈1 eV. First‐principles density functional theory calculations suggest that this bandgap reduction originates from a lowering of the conduction band upon the introduction of Fe3+. These findings open new
Huygen J. Jöbsis +9 more
wiley +1 more source
Advanced Functional Materials, Volume 34, Issue 50, December 9, 2024.Wide‐bandgap and air‐stable perovskite‐inspired materials (PIMs) are low‐toxicity alternatives to lead‐halide perovskites (LHPs). However, the optoelectronic performance of PIMs is far inferior to that of the LHPs, particularly due to a high defect density.
G. Krishnamurthy Grandhi +9 more
wiley +1 more source
Advanced Functional Materials, Volume 34, Issue 29, July 17, 2024.NaBiS2 has high air stability and strong absorption at and above its pseudo‐direct bandgap of 1.4 eV. However, the long‐chain organic ligands necessary for synthesis impede charge‐carrier transport in NaBiS2. Herein, both intra‐nanocrystal and inter‐nanocrystal charge‐carrier mobilities are enhanced through ligand exchange with inorganic iodide ligands,
Yi‐Teng Huang +18 more
wiley +1 more source
Lead‐Free Perovskites and Metal Halides for Resistive Switching Memory and Artificial Synapse
Small Structures, Volume 5, Issue 6, June 2024.Transitioning from lead‐based to lead‐free halide perovskites and their derivatives is vital for advancing metal halide‐based resistive switching memory and artificial synapse toward commercialization. This review introduces the fundamentals of lead‐free metal halides used in memristors, comprehensively summarizes the recent progress in the field, and ...
Bo Wei Zhang +7 more
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Advanced Optical Materials, Volume 12, Issue 10, April 4, 2024.It is unusual to have a decrease in lifetime with temperature due to an increase in radiative rate. Normally, the decrease is due to an increase in nonradiative rate. The use of the europium ion as an indicator of changes in site symmetry with temperature has severe limitations. Abstract The measurement of quantum yield (QY) is an important process for
Daiwen Xiao +4 more
wiley +1 more source