Journal ArticleDOI
Dielectric and Raman investigations of structural phase transitions in (C2H5NH3)2CdCl4
Ruchika Yadav,Diptikanta Swain,Partha P. Kundu,Harikrishnan S. Nair,Harikrishnan S. Nair,Chandrabhas Narayana,Suja Elizabeth +6 more
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TLDR
Temperature-dependent Raman and dielectric measurements have been carried out on (C2H5NH3)2CdCl4 single crystals and indicate that the transition at 216 K is order-disorder in nature and is driven by re-orientation of organic ions, while the Transition at 114 K is due to coupling between the CdCl6 octahedron and the organic chain.Abstract:
Temperature-dependent Raman and dielectric measurements have been carried out on (C2H5NH3)2CdCl4 single crystals. Raman studies reveal the presence of two structural phase transitions below room temperature at 216 K and 114 K. The phase transitions are marked by anomalies in temperature dependence of wave-number and full width half maximum (FWHM) of several vibrational modes. The transitions are also accompanied by anomalies in dielectric measurements. Raman and dielectric data indicate that the transition at 216 K is order–disorder in nature and is driven by re-orientation of organic ions, while the transition at 114 K is due to coupling between the CdCl6 octahedron and the organic chain. Further high temperature dielectric measurements reveal the presence of one more structural phase transition around 473 K across which dispersion in dielectric parameters is observed. The activation energies and relaxation time obtained for high temperature dielectric phases are characteristic of combined reorientation motions of alkyl ammonium cations.read more
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Electron‐State Confinement of Polysulfides for Highly Stable Sodium–Sulfur Batteries
Chao Ye,Yan Jiao,Dongliang Chao,Tao Ling,Jieqiong Shan,Binwei Zhang,Qinfen Gu,Kenneth Davey,Haihui Wang,Shi-Zhang Qiao,Shi-Zhang Qiao +10 more
TL;DR: The resultant room-temperature sodium-sulfur batteries are amongst the most stable reported so far, thus demonstrating that the new mechanism opens a promising avenue for the development of high-performance metal-solfur batteries.
Journal ArticleDOI
Vibrational Response of Methylammonium Lead Iodide: From Cation Dynamics to Phonon–Phonon Interactions
Tanja Ivanovska,Claudio Quarti,Giulia Grancini,Giulia Grancini,Annamaria Petrozza,Filippo De Angelis,Alberto Milani,Giampiero Ruani +7 more
TL;DR: This study enriches the fundamental knowledge of phonon interactions and charge transport in CH3 NH3 PbI3 for the further development of optoelectronic applications.
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Bright Green Emission from Self-Trapped Excitons Triggered by Sb3+ Doping in Rb4CdCl6
Journal ArticleDOI
Structural, optical properties and characterization of (C2H5NH3)2CdCl4, (C2H5NH3)2CuCl4 and (C2H5NH3)2Cd0.5Cu0.5Cl4 compounds
TL;DR: In this paper, the synthesis of hybrid perovskite crystals (C 2 H 5 NH 3 ) 2 CdCl 4, C 2 H 6 NH 3, 2.5 Cu 0.5 Cl 4, and C 2H 5 NH3 ) 2 CuCl 4 ) using the conventional method was studied.
Journal ArticleDOI
Effect of Temperature and Pressure on Structural and Optical Properties of Organic-Inorganic Hybrid Manganese Halides.
Yi-Shin Chen,Zhen Bao,Wen-Tse Huang,Agata Lazarowska,Natalia Majewska,Sebastian Mahlik,Grzegorz Leniec,Slawomir Maksymilian Kaczmarek,Hsiao-Yu Huang,Chun I. Wu,Di-Jing Huang,Ru-Shi Liu +11 more
TL;DR: In this article , the detailed properties of (C10H16N)2MnBr4, which emits bright green light with a high photoluminescence quantum yield, were reported.
References
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