Results 81 to 90 of about 201,843 (301)

A New Threshold Switching Device With Tunable Negative Differential Resistance Based on ErMnO3 Polymorphs

Advanced Functional Materials, EarlyView.
Polymorph engineering in ErMnO3 enables low‐voltage, forming‐free threshold switching with tunable negative differential resistance. Conducting orthorhombic regions embedded in an insulating hexagonal matrix provide controlled Joule‐heating‐enhanced Poole–Frenkel transport. The hexagonal phase prevents excessive heating and breakdown.
Rong Wu, Florian Maudet, Thanh Luan Phan, Wassim Hamouda, Richard Schroedter, Ahmet Samil Demirkol, Ronald Tetzlaff, Veeresh Deshpande, Catherine Dubourdieu   +8 more
wiley   +1 more source

Revealing the microstructure evolution of inorganic CsPbI2Br perovskite via synchrotron radiation grazing incidence X‐ray diffraction

Nano Select, 2021
Perovskite devices have been developed rapidly over the past decade and all‐inorganic perovskite devices have attracted wide interest due to their outstanding stability.
Yanan Dong, Keqing Huang, Jianhui Chang, Jian Zhang, Yingguo Yang, Junliang Yang   +5 more
doaj   +1 more source

$\textit{Ab-initio}$ study of $\textit{A}BiO_3$ ($A$=Ba, Sr, Ca) under high pressure

, 2018
Using $\textit{ab-initio}$ crystal structure prediction we study the high-pressure phase diagram of $\textit{A}BiO_3$ bismuthates ($A$=Ba, Sr, Ca) in a pressure range up to 100$~$GPa.
Boeri, Lilia, Franchini, Cesare, Smolyanyuk, Andriy   +2 more
core   +1 more source

Synthesis of silicon doped SrMO3 (M=Mn, Co): stabilization of the cubic perovskite and enhancement in conductivity [PDF]

, 2011
In this paper we report the successful incorporation of silicon into SrMO3 (M=Co, Mn) leading to a structural change from a hexagonal to a cubic perovskite.
Hancock, C, Slater, Peter.R.
core   +1 more source

Liquid Phase Transmission Electron Microscopy: A Window into the Early Stages of Complex Material Formation

Advanced Functional Materials, EarlyView.
Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum, Vinavadini Ramnarain, Nathaly Ortiz Peña, Dris Ihiawakrim, Clément Sanchez, Ovidiu Ersen   +5 more
wiley   +1 more source

Investigation of perovskite layer growth from solution on textured substrates

EPJ Photovoltaics
Surface textures are indispensable to minimize optical losses in perovskite-based solar cells. However, the solution-processing of perovskite layers is often not compatible with textured substrates, and little is known about the film growth thereon. This
Riesebeck Florian, Mathies Florian, Yoo Danbi, Trofimov Sergei, Unger Eva, Becker Christiane   +5 more
doaj   +1 more source

Complexation‐Mediated Diffusion‐Limited Crystal Growth: A General Framework for Anisotropic Crystal Growth in Cu‐Based Perovskites

Advanced Functional Materials, EarlyView.
A Complexation‐Mediated Diffusion‐Limited Growth (CMDLG) framework is established to rationalize the anisotropic growth of lead‐free perovskites. Integrating coordination chemistry with mass transport kinetics, this study theoretically derives and experimentally validates that stable iodocuprate complexes induce a diffusion‐limited regime.
Hyunmin Lee, Mu Geun Son, Thanh Van Vu, Hokyeong Jeong, Joonhee Kang, Youngjong Kang   +5 more
wiley   +1 more source

Balancing structural formability and lattice microstrain in methylammonium-free wide bandgap perovskites

JPhys Energy
State-of-the-art wide bandgap perovskite compositions for perovskite/silicon tandem solar cells often incorporate methylammonium (MA) containing multi-cation-mixed-halides compositions to achieve high efficiency.
Wenting Zheng, Keonwoo Park, Joo-Hong Lee, Hae-Jun Seok, Sung-Kwang Jung, Seung-Gu Choi, Han-Ki Kim, Hyojung Ahn, Jin-Wook Lee   +8 more
doaj   +1 more source

Stability Issues on Perovskite Solar Cells

Photonics, 2015
Organo lead halide perovskite materials like methylammonium lead iodide (CH3NH3PbI3) and formamidinium lead iodide (HC(NH2)2PbI3) show superb opto-electronic properties.
Xing Zhao, Nam-Gyu Park
doaj   +1 more source

Performance and Stability Comparison of Low-Cost Mixed Halide Perovskite Solar Cells: CH3NH3PbI3-xClx and CH3NH3PbI3-xSCNx

International Journal of Photoenergy, 2020
Perovskite solar cell is categorized as a third-generation solar cell which is used for its high-performance and low-cost production. However, device stability is a major problem in the development of perovskite solar cells.
Nji Raden Poespawati, Junivan Sulistianto, Tomy Abuzairi, Retno Wigajatri Purnamaningsih   +3 more
doaj   +1 more source