Results 11 to 20 of about 435 (137)
Prediction of pressure-induced red shift of f->d(t2g) excitations in Cs2NaYCl6:Ce(3+) and its connection with bond length shortening [PDF]
, 2005 Quantum chemical calculations including embedding, scalar relativistic, and dynamic electron correlation effects on Cs2NaYCl6:(CeCl6)3- embedded clusters predict: (i) red shifts of the 4f->5d(t2g) transition with pressure and (ii) bond length shortening ...
Bray K. L. +4 more
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Direct evidence of intervalence charge-transfer states of Eu-doped luminescent materials [PDF]
, 2019 Direct evidence is given for the existence of intervalence charge transfer (IVCT) states of Eu2+/Eu3+ pairs in Eu-doped CaF2 , SrF2, and BaF2 . They are detected in diffuse reflectance spectra.
Barandiarán, Zoila +2 more
core +2 more sources
Elucidating the Factors Limiting the Photovoltaic Performance of Mixed Sb–Bi Halide Elpasolite Absorbers [PDF]
, 2022 Although Cs2AgBiBr6 halide elpasolites have gained substantial attention as potential nontoxic and stable alternatives to lead–halide perovskites, they are limited by their wide bandgaps >2.2 eV. Alloying with Sb into the pnictogen site has been shown
Joe Briscoe +6 more
core +2 more sources
Synthese, Kristallstruktur und Eigenschaften von Tetraaminophosphonium-iodid P(NH2)4I [PDF]
, 1994 The title compound has been prepared starting from phosphorothionic triamide SP(NH2)3 by methylation of the sulfur atom and subsequent ammonolysis reaction in dry acetonitrile and dichloromethane, respectively, both at room temperature.
Horstmann, Stefan, Schnick, Wolfgang
core +1 more source
Dual gamma/neutron directional elpasolite detector
SPIE Proceedings, 2013 Some applications, particularly in homeland security, require detection of both neutron and gamma radiation. Typically, this is accomplished with a combination of two detectors registering neutrons and gammas separately. We have investigated a new type of neutron/gamma (n/γ) directional detection capability.
Paul Guss, Sanjoy Mukhopadhyay
openaire +2 more sources
Halide double-perovskites: High efficient light emission and beyond [PDF]
, 2023 Lead-free halide double perovskites are stable and versatile materials for a wide range of applications, particularly for lighting, thanks to their very efficient emission of warm white light.
Bongiovanni, Giovanni +7 more
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IEEE AccessElpasolites are expected to be promising photovoltaic semiconductor alternatives to lead-based perovskite semiconductors. Concern over the stability and toxicity of lead halide perovskites has led to an increase in interest in the environmental friendly ...
G. P. S. Prashanthi, Umakanta Nanda
doaj +1 more source
, 2004 Perturbative contributions to single-beam two-photon transition rates may be divided into two types. The first, involving low-energy intermediate states, require a high-order perturbation treatment, or an exact diagonalization.
Axe +35 more
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Searching for new ferroelectrics and multiferroics : a user’s point of view [PDF]
, 2015 A perspective on computational studies of ferroelectrics and multiferroics is given that emphasises what has yet to be done, along with some subtleties in previously studied systems.
Scott, James Floyd
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Microscopic origin of pressure-induced isosymmetric transitions in fluoromanganate cryolites
, 2014 Using first-principles density functional theory calculations, we investigate the hydrostatic pressure-induced reorientation of the Mn--F Jahn-Teller bond axis in the fluoride cryolite Na$_3$MnF$_6$.
Charles, Nenian, Rondinelli, James M.
core +1 more source