Results 51 to 60 of about 23,096 (291)

First-order Raman spectra of double perovskites AB$'{1/2}B$''{1/2}O3

, 2004
First principles computations of Raman intensities were performed for perovskite-family compound CaAl$_{1/2}$Nb$_{1/2}$O$_3$ (CAN). This compound features 1:1 (NaCl-type) ordering of Al and Nb superimposed onto the $b^-b^-c+$ octahedral tilting.
G. A. Smolenskii, G. Kresse, G. Placzek, Hiro-o Hamaguchi, I. G. Siny, I. Levin, J. Maslar, L. E. Cross, M. A. Krivoglaz, M. Born, R. H. Mitchell, S. A. Prosandeev, S. A. Prosandeev, U. Waghmare, W. Hayes   +14 more
core   +1 more source

Bias‐Free Highly Efficient and Stable Dye‐Sensitized Photoelectrochemical Cells via Cascade Charge Transfer

Advanced Functional Materials, EarlyView.
A buried‐junction DSPEC design is introduced that leverages cascade charge transfer to enhance efficiency, stability, and versatility. This approach facilitates effective charge transfer and minimizes recombination losses, leading to significant improvements.
Jun‐Hyeok Park, Kyounglim Kim, Jinyoung Lee, Sarang Kim, Gwangsu Yoon, So Yeon Yoon, Jeong Kyeong Lee, Ji‐Wook Jang, Tae‐Hyuk Kwon   +8 more
wiley   +1 more source

Low Temperature Optical Properties of Novel Lead‐Free Cs2NaFeCl6 Perovskite Single Crystals

Advanced Photonics Research, 2023
Lead‐free double perovskites have attracted much attention as possible alternatives to lead halide based perovskites in photovoltaic applications. However, to date only few double perovskites have been successfully employed in optoelectronic device ...
Melina Armer, Patrick Dörflinger, Andreas Weis, Carsten Büchner, Andreas Gottscholl, Julian Höcker, Kilian Frank, Lukas Nusser, Maximilian T. Sirtl, Bert Nickel, Thomas Bein, Vladimir Dyakonov   +11 more
doaj   +1 more source

Magnetic and electric properties of double-perovskites and estimation of their Curie temperatures by ab initio calculations

, 2008
First principles electronic structure calculations have been carried out on ordered double perovskites Sr_2B'B"O_6 (for B' = Cr or Fe and B" 4d and 5d transition metal elements) with increasing number of valence electrons at the B-sites, and on ...
A. R. Mackintosh, C. Herring, Claudia Felser, Jürgen Kübler, K.-I. Kobayashi, Martha Greenblatt, T. Moriya, Tapas Kumar Mandal, V. Heine   +8 more
core   +1 more source

Differentiating between perovskite and double perovskite nanocrystals

, 2023
Perovskite structure takes the empirical formula ABX3, whereas Double perovskites, or elpasolites, are the crystal structures in which the B position in ABX3 is equally occupied by two different cations. The usual compositions of Double perovskite structure are (1-3) type double perovskites, which means that the two B cations have +1 and +3 oxidation ...
Mishra, Pritish, Zhang, Mengyuan, Lam, Yeng Ming, Hippalgaonkar, Kedar   +3 more
openaire   +1 more source

Theory of half-metallic double perovskites. I. Double exchange mechanism [PDF]

Physical Review B, 2013
The double perovskite material \SFMO has the rare and desirable combination of a half-metallic ground state with 100% spin polarization and ferrimagnetic \Tc$\simeq 420$K, well above room temperature. In this two-part paper, we present a comprehensive theoretical study of the magnetic and electronic properties of half metallic double perovskites.
Meetei, O. Nganba, Erten, Onur, Mukherjee, Anamitra, Randeria, Mohit, Trivedi, Nandini, Woodward, Patrick   +5 more
openaire   +2 more sources

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Synthesis, Single Crystal Growth, and Properties of Cobalt Deficient Double Perovskite EuBaCo2−xO6−δ (x = 0–0.1)

Journal of Chemistry, 2017
The cobalt deficient double perovskites EuBaCo2−xO6−δ with x=0–0.1 were obtained both as powders and as single crystal. Formation of cobalt vacancies in their crystal lattice was shown to be accompanied by the formation of oxygen ones.
S. V. Telegin, A. Yu. Zuev, S. V. Naumov, E. I. Patrakov, D. S. Tsvetkov   +4 more
doaj   +1 more source

Lead-Free Halide Double Perovskite Materials: A New Superstar Toward Green and Stable Optoelectronic Applications

Nano-Micro Letters, 2019
Lead-based halide perovskites have emerged as excellent semiconductors for a broad range of optoelectronic applications, such as photovoltaics, lighting, lasing and photon detection.
Liang Chu, Waqar Ahmad, Wei Liu, Jian Yang, Rui Zhang, Yan Sun, Jianping Yang, Xing’ao Li   +7 more
doaj   +1 more source

Low energy paths for octahedral tilting in inorganic halide perovskites

, 2018
Instabilities relating to cooperative octahedral tilting is common in materials with perovskite structures, and in particular in the sub class of halide perovskites.
Klarbring, Johan
core   +1 more source