Low-Dimensional Hybrid Indium/Antimony Halide Perovskites: Supramolecular Assembly and Electronic Properties

2020 ◽  
Vol 124 (47) ◽  
pp. 25686-25700
Author(s):  
Aaron D. Nicholas ◽  
Ryan N. Halli ◽  
Leah C. Garman ◽  
Christopher L. Cahill
Keyword(s):  
Electronic Properties ◽  
Supramolecular Assembly ◽  
Halide Perovskites ◽  
Low Dimensional

Electronic properties of quasi two-dimensional transition metals chalcogenides with low-dimensional magnetism

Doklady BGUIR ◽  
2020 ◽  
Vol 18 (7) ◽  
pp. 87-95
Author(s):  
M. S. Baranava ◽  
P. A. Praskurava
Keyword(s):  
Transition Metal ◽  
Transition Metals ◽  
Exchange Interaction ◽  
Electronic Properties ◽  
Metal Atom ◽  
Transition Metal Atom ◽  
Two Dimensional ◽  
Transition Metal Atoms ◽  
Ground Magnetic ◽  
Low Dimensional

The search for fundamental physical laws which lead to stable high-temperature ferromagnetism is an urgent task. In addition to the already synthesized two-dimensional materials, there remains a wide list of possible structures, the stability of which is predicted theoretically. The article suggests the results of studying the electronic properties of MAX3 (M = Cr, Fe, A = Ge, Si, X = S, Se, Te) transition metals based compounds with nanostructured magnetism. The research was carried out using quantum mechanical simulation in specialized VASP software and calculations within the Heisenberg model. The ground magnetic states of twodimensional MAX3 and the corresponding energy band structures are determined. We found that among the systems under study, CrGeTe3 is a semiconductor nanosized ferromagnet. In addition, one is a semiconductor with a bandgap of 0.35 eV. Other materials are antiferromagnetic. The magnetic moment in MAX3 is localized on the transition metal atoms: in particular, the main one on the d-orbital of the transition metal atom (and only a small part on the p-orbital of the chalcogen). For CrGeTe3, the exchange interaction integral is calculated. The mechanisms of the formation of magnetic order was established. According to the obtained exchange interaction integrals, a strong ferromagnetic order is formed in the semiconductor plane. The distribution of the projection density of electronic states indicates hybridization between the d-orbital of the transition metal atom and the p-orbital of the chalcogen. The study revealed that the exchange interaction by the mechanism of superexchange is more probabilistic.

Advances of Nonlinear Photonics in Low‐Dimensional Halide Perovskites

Small ◽  
2021 ◽  
pp. 2100809
Author(s):  
Gang Wang ◽  
Shiliang Mei ◽  
Jinfeng Liao ◽  
Wei Wang ◽  
Yuxin Tang ◽  
...  
Keyword(s):  
Halide Perovskites ◽  
Low Dimensional ◽  
Nonlinear Photonics

scholarly journals Low dimensional metal halide perovskites and hybrids

2019 ◽  
Vol 137 ◽  
pp. 38-65 ◽  
Author(s):  
Chenkun Zhou ◽  
Haoran Lin ◽  
Qingquan He ◽  
Liangjin Xu ◽  
Michael Worku ◽  
...  
Keyword(s):  
Metal Halide ◽  
Halide Perovskites ◽  
Low Dimensional

scholarly journals Tailoring capping-layer composition for improved stability of mixed-halide perovskites

2022 ◽  
Author(s):  
Noor Titan Putri Hartono ◽  
Marie-Hélène Tremblay ◽  
Sarah Wieghold ◽  
Benjia Dou ◽  
Janak Thapa ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Capping Layer ◽  
Improved Stability ◽  
Halide Perovskites ◽  
The Stability ◽  
Low Dimensional ◽  
Layer Composition

Incorporating a low dimensional (LD) perovskite capping layer on top of perovskite absorber, improves the stability of perovskite solar cells (PSCs). However, in the case of mixed-halide perovskites, which can...

scholarly journals Enhanced Luminescence and Mechanistic Studies on Mn-doped Double Layered Perovskite Phosphors: Cs4Mn1−xCdxBi2Cl12

2020 ◽  
Author(s):  
Brenda Vargas ◽  
Diana T. Reyes-Castillo ◽  
Eduardo Coutino-Gonzalez ◽  
Citlali Sánchez-Aké ◽  
Carlos Ramos ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Layered Perovskite ◽  
Great Promise ◽  
New Family ◽  
Halide Perovskites ◽  
Optoelectronic Applications ◽  
The Stability ◽  
Low Dimensional ◽  
Stability Issues ◽  
Mn Doped

Halide perovskites offer great promise for optoelectronic applications, but stability issues continue to hinder its implementation and long-term stability. The stability of all-inorganic halide perovskites and the inherent quantum confinement of low dimensional perovskites can be harnessed to synthesize materials with high PL efficiency. An example of such materials is the recently reported new family of layered double perovskites, Cs4Mn1−xCdxBi2Cl12. Herein, we report a new synthetic procedure that enhances the maximum PLQY of this family materials to up 79.5%, a 20% enhancement from previous reports and the highest reported for a Mn-doped halide perovskite. Importantly, stability tests demonstrate that these materials are very stable towards humidity, UV irradiation, and temperature. Finally, we investigated the photophysics, the effects of magnetic coupling and temperature in the PL efficiency and proposed a mechanism for the emission process. Our results highlight the potential of this family of materials and related layered all-inorganic perovskites for solid-state lighting and optoelectronic applications<p></p>

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