scholarly journals Discovery of the Crystal Phase Transition on Lead-free Cesium Manganese Bromine Perovskite Nanocrystal by Solvent Concentration

2021 ◽  
Author(s):  
Tae Wook Kang ◽  
Eun Jin Choi ◽  
Young Ji Park ◽  
Jonghee Hwang ◽  
Byungseo Bae ◽  
...  
Keyword(s):  
Phase Transition ◽  
Lead Free ◽  
Crystal Phase ◽  
Solvent Concentration ◽  
Durability Test ◽  
Red Emission ◽  
Hot Injection ◽  
Structure Phase ◽  
Crystal Phase Transition ◽  
Post Synthesis

Abstract We have been demonstrated the crystal phase transition for lead-free cesium manganese bromine perovskite nanocrystal synthesized by the modified hot-injection method due to change the concentration of solvent (trioctylphosphine; TOP). The compositions to be synthesized were determined by the amount of TOP solvent, and the structure phase of nanocrystal was changed from hexagonal CsMnBr3 to tetragonal Cs3MnBr5 as the amount of TOP solvent increased. The emission peaks of CsMnBr3 and Cs3MnBr5 nanocrystals were observed at 650 nm (red) and 520 nm (green), respectively. After a durability test at 85 °C and 85% humidity for 24 h, the lead-free perovskite CsMnBr3 nanocrystal powder maintained its initial emission intensity, and the metal halide Cs3MnBr5 nanocrystal powder exhibited an increase in red emission due to the post-synthesis of CsMnBr3 nanocrystals.

scholarly journals Vertically Aligned CsPbBr3 Nanowire Arrays with Template-Induced Crystal Phase Transition and Stability

2021 ◽  
Vol 125 (8) ◽  
pp. 4860-4868
Author(s):  
Zhaojun Zhang ◽  
Klara Suchan ◽  
Jun Li ◽  
Crispin Hetherington ◽  
Alexander Kiligaridis ◽  
...  
Keyword(s):  
Phase Transition ◽  
Nanowire Arrays ◽  
Crystal Phase ◽  
Vertically Aligned ◽  
Crystal Phase Transition

Single-crystal to single-crystal phase transition of cucurbit[5]uril hydrochloride hydrates: large water-filled channels transforming to layers of unusual stability

2008 ◽  
pp. 4927 ◽  
Author(s):  
David Bardelang ◽  
Konstantin A. Udachin ◽  
Roberto Anedda ◽  
Igor Moudrakovski ◽  
Donald M. Leek ◽  
...  
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Crystal Phase ◽  
Crystal Phase Transition ◽  
Large Water

Evidence for a liquid crystal phase transition in two-dimensional electrons in high Landau levels

2002 ◽  
Vol 12 (9) ◽  
pp. 377-380
Author(s):  
K. B. Cooper ◽  
M. P. Lilly ◽  
J. P. Eisenstein ◽  
L. N. Pfeiffer ◽  
K. W. West
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Landau Levels ◽  
Crystal Phase ◽  
Two Dimensional ◽  
Liquid Crystal Phase ◽  
Stripe Phase ◽  
Stripe Order ◽  
Crystal Phase Transition ◽  
Liquid Crystal Phase Transition

Transport measurements of high-mohility two-dimensional electron systems at low temperatures have revealed a large resistance anisotropy around half-filling of excited Landau levels. These results have been attributed to electronic stripe-phase formation with spontaneously broken orientational symmetry. Mechanisms which are known to break the orientational symmetry include poorly-understood crystal structure effects and an in-plane magnetic field, $B_{||}$. Here we report that a large $B_{||}$ also causes the transport anisotropy to persist up to much higher temperatures. In this regime, we find that the anisotropic resistance scales sublinearly with $B_{||}/T$. These observations support the proposal that the transition from anisotropic to isotropic transport reflects a liquid crystal phase transition where local stripe order persists even in the isotropic regime.

scholarly journals Conformational Analysis for [M(dmso)6][BPh4]2 [M=Co(II), Zn(II)] Showing Crystal-to-crystal Phase Transition

2018 ◽  
Vol 17 (3) ◽  
pp. 153-154
Author(s):  
Hiroshi SAKIYAMA ◽  
Rjoji MITSUHASHI ◽  
Masahiro MIKURIYA ◽  
Katsushi WAKI
Keyword(s):  
Phase Transition ◽  
Conformational Analysis ◽  
Crystal Phase ◽  
Crystal Phase Transition
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