Results 61 to 70 of about 151,205 (298)

Two-Dimensional Materials for Halide Perovskite-Based Optoelectronic Devices

, 2017
Halide perovskites have high light absorption coefficients, long charge carrier diffusion lengths, intense photoluminescence, and slow rates of non-radiative charge recombination.
Shan Chen, Gaoquan Shi, Shi, Gaoquan, Chen, Shan   +3 more
core   +1 more source

Akimotoite to perovskite phase transition in MgSiO3 [PDF]

, 2004
The akimotoite to perovskite phase transition of MgSiO3 is shown by first principles calculations to have a negative Clapeyron slope, consistent with experimental observations.
Karki, B. B., Kiefer, B., Wentzcovitch, R. M., Karki, BB, Wentzcovitch, RM, Stixrude, L, Kiefer, B, Stixrude, L.   +7 more
core   +1 more source

Temperature Sensitive and Reversible Halide Ion Exchange in Inorganic-Organic Hybrid CH3NH3Pbl3-xBrx Mixed-halide Perovskite [PDF]

, 2021
Ion exchange of organic-inorganic hybrid perovskite plays an important role in controlling the performance of materials ant its devices. In this study, we found an interesting phenomenon that the precipitate in the in suspension (CH3NH3PbI3-xBrx in γ ...
Xun, Sun, Xianxi, Zhang, Huawei, Zhou, SiWen, Tao, Shuting, Cui, Jie, Yin   +5 more
core   +2 more sources

Spin Noise of a Halide Perovskite

Physical Review Letters
We report on first observation of spin noise in a strongly birefringent semiconductor -- halide perovskite single crystal MAPbI$_3$. The observed spin noise resonance is ascribed to free holes with a record spin dephasing time of 4 ns. The spin dynamics is found to be affected by the residual light absorption of the crystal providing renormalization of
V. O. Kozlov, N. I. Selivanov, C. C. Stoumpos, G. G. Kozlov, V. S. Zapasskii, Yu. V. Kapitonov, D. S. Smirnov, I. I. Ryzhov   +7 more
openaire   +3 more sources

Halide perovskite quantum dot based 0D-2D mixed-dimensional heterostructure photodetectors: progress and challenges

工程科学学报, 2019
Due to various advantages such as outstanding light absorption coefficient, long charge carrier diffusion distance, simple synthesis method, and low cost, halide perovskite materials, which are light absorption materials, are widely considered as ...
KANG Zhuo, WU Hua-lin, SI Hao-nan, ZHANG Yue   +3 more
doaj   +1 more source

Tuning the Optoelectronic Properties of Wide Bandgap Perovskites: Data‐Driven Insights from Combinatorial Synthesis and High‐Throughput Experimentation

Advanced Functional Materials, EarlyView.
Combinatorial vapor deposition enables independent tuning of Cs/Pb and Br/Cl in wide‐bandgap perovskites. Automated multimodal mapping of 500+ compositions reveals a high‐energy optical transition that correlates with enhanced photoluminescence, defining a practical Cs/Pb window.
Alexander Wieczorek, Sergey Tsarev, Nathan Rodkey, Oleksandr Pshyk, Stefanie Frick, Maksym V. Kovalenko, Sebastian Siol   +6 more
wiley   +1 more source

Dirac‐Source Linear X‐Ray Detection Diode

Advanced Functional Materials, EarlyView.
Monolayer graphene imparts near linear current‐voltage behavior to a perovskite X‐ray detection diode, contrasting with conventional diode‐like responses. Exploiting graphene's Dirac dispersion and a Schottky‐like back‐to‐back junction, the device achieves six‐orders‐of‐magnitude dark current suppression while retaining linearity over 200 V, enabling ...
Babar Shabbir, Shoaib Masood, Jialu Li, R. A. W. Ayyubi, Naeimeh Mozaffari, Mosarof Hossain, Nasir Mahmood, Muhammad Nadeem, Jacek J. Jasieniak   +8 more
wiley   +1 more source

From Bulk to Colloidal Nanocrystals: Top‐Down Synthesis of Highly Luminescent Cs2ZrCl6:Te4+ Double Perovskite Nanocrystals for X‐Ray Imaging

Advanced Functional Materials, EarlyView.
Top‐down ultrasonication produces highly emissive Cs2ZrCl6:Te4+ nanocrystals (NCs) with a PLQY of 65%, which is higher compared to that of the NCs synthesized by typical bottom‐up hot‐injection synthesis. The colloidal Cs2ZrCl6:Te4+ NCs have been found to be potential candidates for x‐ray scintillation imaging.
Yang Liu, Ye Wu, Hongpeng Liu, Cong Cui, Iago López‐Fernández, Nadesh Fiuza‐Maneiro, Sergio Gómez‐Graña, Yingjun Chai, Zhicheng Wang, Yusheng Wu, Laishi Li, Xiaoming Li, Lakshminarayana Polavarapu   +12 more
wiley   +1 more source

Halide Diffusion in Mixed-Halide Perovskites and Heterojunctions

Chemistry of Materials
Migration of halide defects guides ion transport in metal halide perovskites and controls the kinetics of halide mixing and phase separation. We study the diffusion of halide vacancies and interstitials in \ce{CsPb(I_{x}Br_{1-x})_{3}} and \ce{CsPbI_{3}}/\ce{CsPbBr_{3}} heterojunctions by molecular dynamics simulations using neural network potentials ...
Viren Tyagi, Mike Pols, Geert Brocks, Shuxia Tao   +3 more
openaire   +2 more sources

Nitride MXenes Beyond Carbides: Bridging the Gap Between Computational Prediction and Experimental Realization

Advanced Functional Materials, EarlyView.
Nitride MXenes remain constrained by a persistent gap between computational prediction and experimental realization. This Review identifies the thermodynamic, kinetic, and chemical barriers limiting their synthesis, critically evaluates emerging fabrication routes, and proposes a multidimensional computational‐experimental framework to accelerate the ...
Naresh Varnakavi, Masoud Soroush
wiley   +1 more source