Results 41 to 50 of about 454 (154)

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, Chun‐Ho Lin, Shruti Nirantar, EQ Han, Yurou Zhang, Zitong Wang, Miaoqiang Lyu, Lianzhou Wang   +7 more
wiley   +1 more source

Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs2NaEuCl6

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, Hei‐Yui Kai, Guohua Jia, Ka‐Leung Wong, Peter A. Tanner   +4 more
wiley   +1 more source

Feature Optimization for Atomistic Machine Learning Yields A Data-Driven Construction of the Periodic Table of the Elements

, 2019
Machine-learning of atomic-scale properties amounts to extracting correlations between structure, composition and the quantity that one wants to predict.
Ceriotti, Michele, Musil, Félix, Willatt, Michael J.   +2 more
core   +1 more source

A Density Functional Theory Insight into Structural, Mechanical, and Optical Properties of Rb2LiTlF6 Double Perovskite

Advanced Engineering Materials, Volume 26, Issue 5, March 2024.
In this article, the results on the geometrical, electronic, energetic, mechanical, and optical properties of Rb2LiTlF6 are reported for the first time from an abinitio approach accompanied by a glimse of its anticipated applications. This work serves as a basic guide that will inspire future scientific studies on cubic phase of Rb2LiTlF6 double ...
Elkana K. Rugut, Nnditshedzeni E. Maluta, Regina R. Maphanga, Refilwe E. Mapasha, Joseph K. Kirui   +4 more
wiley   +1 more source

Improved Hole Extraction and Band Alignment via Interface Modification in Hole Transport Material‐Free Ag/Bi Double Perovskite Solar Cells

Solar RRL, Volume 8, Issue 6, March 2024.
Herein, a 2D/3D modification is applied through n‐butylammonium treatment to a Cs2AgBiBr6 perovskite thin film to fabricate hole transport material‐free solar cells, bearing carbon black electrodes. The 2D/3D modification improves the band alignment of the perovskite toward the hole selective contact, while strongly reducing the device material and ...
Fabian Schmitz, Ribhu Bhatia, Julian Burkhart, Pascal Schweitzer, Marco Allione, Jaime Gallego, Piotr Piotrowski, Jakub Cajzl, Piotr Paszke, Gour Mohan Das, Dorota A. Pawlak, Federico Bella, Derck Schlettwein, Francesco Lamberti, Simone Meloni, Teresa Gatti   +15 more
wiley   +1 more source

Lead‐Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospective

Advanced Functional Materials, Volume 34, Issue 6, February 5, 2024.
This roadmap review summarizes the latest progress, outstanding challenges, and future directions of Pb‐free halide perovskites regarding their synthesis, optical spectroscopy, and optoelectronic devices. Abstract Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by ...
Iago López‐Fernández, Donato Valli, Chun‐Yun Wang, Subarna Samanta, Takuya Okamoto, Yi‐Teng Huang, Kun Sun, Yang Liu, Vladimir S. Chirvony, Avijit Patra, Juliette Zito, Luca De Trizio, Deepika Gaur, Hong‐Tao Sun, Zhiguo Xia, Xiaoming Li, Haibo Zeng, Iván Mora‐Seró, Narayan Pradhan, Juan P. Martínez‐Pastor, Peter Müller‐Buschbaum, Vasudevanpillai Biju, Tushar Debnath, Michael Saliba, Elke Debroye, Robert L. Z. Hoye, Ivan Infante, Liberato Manna, Lakshminarayana Polavarapu   +28 more
wiley   +1 more source

Structurally Triggered Metal-Insulator Transition in Rare-Earth Nickelates

, 2017
Rare-earth nickelates form an intriguing series of correlated perovskite oxides. Apart from LaNiO3, they exhibit on cooling a sharp metal-insulator electronic phase transition, a concurrent structural phase transition and a magnetic phase transition ...
Bieder, Jordan, Ghosez, Philippe, Iniguez, Jorge, Mercy, Alain   +3 more
core   +2 more sources

Route to stable lead-free double perovskites with the electronic structure of CH3NH3PbI3: a case for mixed-cation [Cs/CH3NH3/CH(NH2)2]2InBiBr6 [PDF]

, 2017
During the past year, halide double perovskites attracted attention as potential lead-free alternatives to Pb-based halide perovskites. However, none of the compounds discovered so far can match the optoelectronic properties of MAPbI3 (MA = CH3NH3). Here
Giustino, Feliciano, Haghighirad, Amir Abbas, Snaith, Henry J., Volonakis, George   +3 more
core   +2 more sources

Development of a Low-Resource Combined Gamma-Ray and Neutron Spectrometer for Planetary Science [PDF]

, 2020
Planetary neutron and gamma-ray spectroscopy (NGRS) has become a standard technique to measure distinctive geochemical composition and volatile abundance signatures for key elements relevant to planetary structure and evolution.
Bartlett, Kurtis D., Beckman, Darrel T., Coupland, Daniel D. S., Dallmann, Nicholas A., Feldman, William C., Mesick, Katherin E., Stonehill, Laura C., Storms, Steven A., West, Stephen T.   +8 more
core   +1 more source

Hydrothermal and Mechanosynthesis of Mixed‐Cation Double Perovskite Scintillators for Radiation Detection

Advanced Optical Materials, Volume 12, Issue 2, January 16, 2024.
A new mechanical synthesis model for sub 500 nm nanocrystals of the mixed‐cation double perovskite Cs2Ag.6Na.4In.85Bi.15Cl6 is presented alongside to hydrothermally grown single crystals. The crystal structure, elemental composition, and scintillation properties of these materials are discussed alongside nanocomposites incorporating nanocrystals. These
Joseph O'Neill, Joydip Ghosh, Suad Alghamdi, Isabel Braddock, Carol Crean, Robert Dorey, Roma Mulholland, Sion Richards, Matthew Wilson, Hayden Salway, Miguel Anaya, Justin Reiss, Douglas Wolfe, Paul Sellin   +13 more
wiley   +1 more source