Results 1 to 10 of about 2,713 (215)

PROPRIEDADES E AVALIAÇÃO CATALÍTICA DA ZEÓLITA X NANOMÉTRICA CONTENDO CÁTIONS METILAMÔNIO

Química Nova, 2016
The reduction of zeolite particle is one of the main features currently searched; it is due to the catalytic gains that these materials come in some reactions.
João G. P. Vicente, Patrícia M. Lima, Dilson Cardoso   +2 more
doaj   +2 more sources

Synthesis, Structure, and Optoelectronic Properties of a Hybrid Organic–Inorganic Perovskite with a Monoethanolammonium Cation MA_xMEA_1−xPbI₃ [PDF]

Nanomaterials
Hybrid organic–inorganic perovskites have emerged as promising materials for next-generation optoelectronic devices owing to their tunable properties and low-cost fabrication.
Andrey Ryabko, Maxat Ovezov, Alexandr Tuchkovsky, Oleg Korepanov, Alexandr Maximov, Alexey Komolov, Eleonora Lazneva, Ekaterina Muratova, Igor Vrublevsky, Andrey Aleshin, Vyacheslav Moshnikov   +10 more
doaj   +2 more sources

Synthesis and Characterization of New Copper(II) Coordination Compounds with Methylammonium Cations

Inorganics
We synthesized four new copper(II) complexes with acetato and chlorido ligands and methylammonium (MA), dimethylammonium (DMA), and tetramethylammonium (TMA) counterions: (MA)4[Cu2Ac4Cl2]Cl2·2H2O (1), (DMA)2[Cu2Ac4Cl2] (2), (DMA)4[Cu2Ac4Cl2]Cl2·2H2O (3),
Amalija Golobič, Brina Dojer, Marko Jagodič, Anja Siher, Anže Pegan, Matjaž Kristl   +5 more
doaj   +2 more sources

Homogeneous crystallization via sustained solvent-extraction channels for methylammonium-free all-perovskite tandem solar cells [PDF]

Nature Communications
Replacing volatile methylammonium (MA+) with formamidinium (FA+) or cesium (Cs+) cations in mixed Pb-Sn perovskite compositions improves thermal resilience.
Yijia Guo, Mengran Yin, Han Gao, Wennan Ou, Pu Wu, Chenshuaiyu Liu, Siyu Xia, Xuntian Zheng, Haowen Luo, Jiajia Hong, Jinyan Guo, Enzuo Wang, Jie Wen, Runnan Liu, Dong Zhou, Lu Zhao, Zhi Li, Jinhuo Liu, Jin Xie, Ludong Li, Renxing Lin, Hairen Tan   +21 more
doaj   +2 more sources

A Solid-state NMR Study of Dimethylamine Cation-doped MAPbBr3 Perovskite Materials

Chinese Journal of Magnetic Resonance, 2023
In this paper, 2H nuclear magnetic resonance (NMR) was performed to study the motions of the embedded cations in the cation-doped lead bromide perovskite (MA0.6DMA0.4PbBr3).
MA Kaiyang, QIAO Wencheng, WANG Xuelu, YAO Yefeng   +3 more
doaj   +1 more source

Direct investigation of the reorientational dynamics of A-site cations in 2D organic-inorganic hybrid perovskite by solid-state NMR

Nature Communications, 2022
The reorientational dynamics of A-site cations in two-dimensional organic-inorganic hybrid perovskites play an important role in determining their physical properties. Here the authors use solid state NMR and isotope labelling to reveal multiple modes of
Cheng-Chieh Lin, Shing-Jong Huang, Pei-Hao Wu, Tzu-Pei Chen, Chih-Ying Huang, Ying-Chiao Wang, Po-Tuan Chen, Denitsa Radeva, Ognyan Petrov, Vladimir M. Gelev, Raman Sankar, Chia-Chun Chen, Chun-Wei Chen, Tsyr-Yan Yu   +13 more
doaj   +1 more source

Improved Stability of FAPbI₃-Based Mixed-Cation Perovskite Solar Cells Fabricated Using Facile Cation Injection Technology

IEEE Photonics Journal, 2022
Compositional engineering adding organic and inorganic cations is considered one of the effective ways to improve the optoelectronic performance of PSCs. However, investigations of mixed-cations in PSCs are still a nascent area of research. In this study,
Soo Beom Hong, Hyung Wook Choi
doaj   +1 more source

1,3-butadiene hydrogenation, bimetallic catalyst, nuclear magnetic resonance (NMR), isomerization process, parahydrogen-induced polarization (PHIP)

Chinese Journal of Magnetic Resonance, 2022
In this work, the motions of methylammonium cations (MA) in different phase structures of MAPbCl3 perovskites, including orthorhombic, tetragonal and cubic phases, were studied by solid-state 2H nuclear magnetic resonance (NMR).
Jia-qi LIANG, Wen-cheng QIAO, Wen-cheng QIAO   +2 more
doaj   +1 more source

Enhanced perovskite electronic properties via A-site cation engineering

Fundamental Research, 2021
Organic-inorganic halide perovskites have emerged as excellent candidates for low-cost photovoltaics and optoelectronics. While the predominant recent trend in designing perovskites for efficient and stable solar cells has been to mix different A-site ...
Xufeng Xiao, Yanmeng Chu, Chunyu Zhang, Zhihui Zhang, Zexiong Qiu, Cheng Qiu, Huaixing Wang, Anyi Mei, Yaoguang Rong, Gengzhao Xu, Yue Hu, Hongwei Han   +11 more
doaj   +1 more source

Benchmark thermodynamic analysis of methylammonium lead iodide decomposition from first principles

JPhys Energy, 2023
Hybrid organic–inorganic perovskites (HOIPs) such as methylammonium lead iodide (MAPbI _3 ) are promising candidates for use in photovoltaic cells and other semiconductor applications, but their limited chemical stability poses obstacles to their ...
Douglas Heine, Hui-Chia Yu, Volker Blum
doaj   +1 more source