Temperature-dependent phase transition and comparative investigation on enhanced magnetic and optical properties between sillenite and perovskite bismuth ferrite-rGO nanocomposites

2017 ◽  
Vol 122 (8) ◽  
pp. 084902 ◽  
Author(s):  
M. A. Jalil ◽  
Sayeed Shafayet Chowdhury ◽  
Mashnoon Alam Sakib ◽  
S. M. Enamul Hoque Yousuf ◽  
Emran Khan Ashik ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Bismuth Ferrite ◽  
Comparative Investigation ◽  
Temperature Dependent

The Effect of Organic Cation Dynamics on the Optical Properties in (PEA)2(MA)[Pb2I7] Perovskite Dimorphs

2021 ◽  
Author(s):  
Lekina Yulia ◽  
Sai Dintakurti ◽  
Benny Febriansyah ◽  
David George Bradley ◽  
Jiaxu Yan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Raman Scattering ◽  
Organic Cation ◽  
Two Dimensional ◽  
Lead Iodide ◽  
Temperature Dependent ◽  
Hybrid Perovskite

Two-dimensional (2D) phenylethyl ammonium (PEA+)-methyl ammonium (MA+) lead iodide ((PEA)2(MA)[Pb2I7]) hybrid perovskite exists as temperature-dependent dimorphs exhibiting an ill-defined phase transition occurring over 150 - 200 K range. Raman scattering,...

Influence of mixed organic cations on the structural and optical properties of lead tri-iodide perovskites

Nanoscale ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 5215-5221 ◽  
Author(s):  
Guotao Pang ◽  
Xiaoqi Lan ◽  
Ruxue Li ◽  
Zhubing He ◽  
Rui Chen
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Organic Cation ◽  
Organic Cations ◽  
Temperature Dependent ◽  
Structural And Optical Properties ◽  
Transition Range ◽  
Phase Transition Range ◽  
Temperature Dependent Photoluminescence

Temperature-dependent photoluminescence in the phase transition range shows that mixed-organic-cation perovskites are more stable than their pure counterparts.

Impact of excess PbI2 on the structure and the temperature dependent optical properties of methylammonium lead iodide perovskites

2018 ◽  
Vol 6 (28) ◽  
pp. 7512-7519 ◽  
Author(s):  
Tobias Meier ◽  
Tanaji P. Gujar ◽  
Andreas Schönleber ◽  
Selina Olthof ◽  
Klaus Meerholz ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Optical Properties ◽  
Electronic Structure ◽  
Binding Energy ◽  
Direct Impact ◽  
Lead Iodide ◽  
Temperature Dependent ◽  
Methylammonium Lead Iodide ◽  
Transition Behaviour

Excess PbI2 in MAPbI3 thin films has no direct impact on the electronic structure but changes the temperature dependence of the exciton binding energy and the phase transition behaviour.

Temperature-dependent photoluminescence properties of mixed-cation methylammonium–formamidium lead iodide [HC(NH2)2]x[CH3NH3]1−xPbI3 perovskite nanostructures

2017 ◽  
Vol 5 (46) ◽  
pp. 12057-12061 ◽  
Author(s):  
Hongge Zheng ◽  
Jun Dai ◽  
Junjie Duan ◽  
Feng Chen ◽  
Gangyi Zhu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Transition Temperature ◽  
Tetragonal Phase ◽  
Photoluminescence Properties ◽  
Lead Iodide ◽  
Temperature Dependent ◽  
Urbach Tail ◽  
Tetragonal Phase Transition ◽  
Temperature Dependent Photoluminescence

Orthorhombic–tetragonal phase transition, temperature-dependent PL related optical properties and Urbach tail characteristics are systematically investigated in the FAxMA1−xPbI3 nanostructures.

scholarly journals Flying-seed-like liquid crystals 5: Liquid crystals based on octakisphenylthiophthalocyanine and their optical properties

2015 ◽  
Vol 19 (05) ◽  
pp. 639-650 ◽  
Author(s):  
Aya Ishikawa ◽  
Kazuchika Ohta ◽  
Mikio Yasutake
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Liquid Crystals ◽  
Optical Microscope ◽  
The Novel ◽  
Phase Transition Behavior ◽  
Temperature Dependent ◽  
X Ray ◽  
Alkyl Chains ◽  
Very High

We have synthesized three novel flying-seed-like liquid crystals based on phthalocyaninato copper(II) (abbreviated as PcCu ) substituted by bulky groups {(o- C1) PhS (i), (m- C1) PhS (j), [m, p-( C1)2] PhS (k)} instead of using long alkyl chains, in order to investigate their mesomorphism. Their phase transition behavior and the mesophase structures have been established by using a polarizing optical microscope, a differential scanning calorimeter, and a temperature-dependent small angle X-ray diffractometer. As the results, [(o-C1)PhS]8PcCu (8i), [(m-C1)PhS]8PcCu (8j) and {[m,p-(C1)2]PhS}8PcCu (8k) show a Coltet.omesophase at 314.9~362.9 °C, a Colro(P2m) mesophase at 287.4~334.2°C and a Colro(P2m) mesophase at 331.8~386.8°C, respectively. Very interestingly, each of the derivatives thus exhibits a columnar mesophase at very high temperatures. The mesomorphism is apparently originated from the novel bulky groups (i~k). It is also noteworthy that the Q-bands of the present PhS-containing Pc derivatives 8i~8k in THF significantly red-shift by about 35 nm in comparison with those of the corresponding PhO-containing derivatives in THF.

Comparative investigation on temperature-dependent photoluminescence of CH3NH3PbBr3and CH(NH2)2PbBr3microstructures

2016 ◽  
Vol 4 (20) ◽  
pp. 4408-4413 ◽  
Author(s):  
Jun Dai ◽  
Hongge Zheng ◽  
Can Zhu ◽  
Junfeng Lu ◽  
Chunxiang Xu
Keyword(s):  
Phase Transition ◽  
Room Temperature ◽  
Comparative Investigation ◽  
Emission Peak ◽  
Red Shift ◽  
Photoluminescence Spectra ◽  
Temperature Dependent ◽  
Exciton Emission ◽  
Temperature Dependent Photoluminescence

Temperature-dependent photoluminescence spectra of CH3NH3PbBr3show that the exciton emission peak continuously blue shifts with the increase in temperature from 10 K to room temperature. CH(NH2)2PbBr3shows a sudden red shift near 150 K due to phase transition.

A comparative investigation of structural and optical properties of annealing modified mullite bismuth ferrite

2019 ◽  
Vol 46 (1-3) ◽  
pp. 52-63
Author(s):  
Baljinder Kaur ◽  
Lakhbir Singh ◽  
Tarun Garg ◽  
Dae-Yong Jeong ◽  
Navneet Dabra ◽  
...  
Keyword(s):  
Optical Properties ◽  
Bismuth Ferrite ◽  
Comparative Investigation ◽  
Structural And Optical Properties

scholarly journals Temperature-dependent optical properties of CuFeO2 through the structural phase transition

RSC Advances ◽  
2021 ◽  
Vol 11 (63) ◽  
pp. 40173-40181
Author(s):  
Hsiao-Wen Chen ◽  
Chu-Yun Huang ◽  
Guo-Jiun Shu ◽  
Hsiang-Lin Liu
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Phase Transitions ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Temperature Dependent ◽  
Complex Phase ◽  
Practical Applications

Delafossite CuFeO2 has recently attracted considerable attention because of its complex phase transitions and practical applications.

Temperature-Dependent Solid-state Luminescence and Reversible Phase Transition of (n-Bu4N)[Au(SC6H3-3,5-Me2)2]

2003 ◽  
Vol 32 (11) ◽  
pp. 1002-1003 ◽  
Author(s):  
Seiji Watase ◽  
Takayuki Kitamura ◽  
Nobuko Kanehisa ◽  
Masami Nakamoto ◽  
Yasushi Kai ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Temperature Dependent ◽  
Reversible Phase Transition ◽  
Reversible Phase ◽  
State Luminescence
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