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.

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,...

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 Temperature-Dependent Photoluminescence of ZnO Thin Films Grown on Off-Axis SiC Substrates by APMOCVD

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1035
Author(s):  
Ivan Shtepliuk ◽  
Volodymyr Khranovskyy ◽  
Arsenii Ievtushenko ◽  
Rositsa Yakimova
Keyword(s):  
Optical Properties ◽  
Structural Quality ◽  
Organic Chemical ◽  
Zno Films ◽  
Vicinal Surfaces ◽  
Temperature Dependent ◽  
Step Flow ◽  
Step Flow Growth ◽  
First Time ◽  
Temperature Dependent Photoluminescence

The growth of high-quality ZnO layers with optical properties congruent to those of bulk ZnO is still a great challenge. Here, for the first time, we systematically study the morphology and optical properties of ZnO layers grown on SiC substrates with off-cut angles ranging from 0° to 8° by using the atmospheric pressure meta–organic chemical vapor deposition (APMOCVD) technique. Morphology analysis revealed that the formation of the ZnO films on vicinal surfaces with small off-axis angles (1.4°–3.5°) follows the mixed growth mode: from one side, ZnO nucleation still occurs on wide (0001) terraces, but from another side, step-flow growth becomes more apparent with the off-cut angle increasing. We show for the first time that the off-cut angle of 8° provides conditions for step-flow growth of ZnO, resulting in highly improved growth morphology, respectively structural quality. Temperature-dependent photoluminescence (PL) measurements showed a strong dependence of the excitonic emission on the off-cut angle. The dependences of peak parameters for bound exciton and free exciton emissions on temperature were analyzed. The present results provide a correlation between the structural and optical properties of ZnO on vicinal surfaces and can be utilized for controllable ZnO heteroepitaxy on SiC toward device-quality ZnO epitaxial layers with potential applications in nano-optoelectronics.

scholarly journals Photoluminescence excitation spectroscopy of GaN thin layers as a function of temperature

1997 ◽  
Vol 2 ◽  
Author(s):  
C. Guénaud ◽  
E. Deleporte ◽  
M. Voos ◽  
C. Delalande ◽  
B. Beaumont ◽  
...  
Keyword(s):  
Optical Properties ◽  
Low Temperature ◽  
Thin Layers ◽  
Photoluminescence Excitation ◽  
Temperature Dependent ◽  
Electron Hole ◽  
Yellow Band ◽  
Neutral Donor ◽  
Photoluminescence Line ◽  
Temperature Dependent Photoluminescence

We report on photoluminescence and photoluminescence excitation experiments performed on hexagonal GaN layers grown on a Sapphire substrate. Information about extrinsic and intrinsic optical properties have been obtained. We show that, at low temperature, the fundamental A excitons are preferentially involved in the relaxation towards the neutral donor bound exciton photoluminescence line, while electron-hole pairs rather participate in the relaxation towards D0−A0 emission and the yellow band. The relaxation from the A exciton towards the yellow band and D0−A0 emission is made easier by temperature. The band structure of the GaN layers has been determined from temperature dependent photoluminescence excitation spectroscopy: A and C excitons and A continuum band gap have been identified up to 210K.

35Cl NQR Studies of Hexachlorometallates(IV) with Organic Cations, A2 [MCl6] and A'[MCl6], M=Sn, Te, Pb and A+, A'2+ = Organic Cation

1990 ◽  
Vol 45 (3-4) ◽  
pp. 293-302 ◽  
Author(s):  
Dirk Borchers ◽  
Alarich Weiss
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Low Temperature ◽  
Resonance Line ◽  
Organic Cation ◽  
Phase Changes ◽  
Organic Cations ◽  
Temperature Phase ◽  
35Cl Nqr ◽  
Low Temperature Phase

Abstract35Cl NQR spectra of eleven hexachlorometallates (IV) A1 [MCl6] and A'[MCl6], M = Sn, Te, Pb, and A+ =ethylammonium, 4-picolinium, anilinium, triethylammonium, chinoxalinium, and piperi-dinium ions, and A'2+ = 1.3-propylenediammonium ion, have been observed as a function of tem-perature. The ethylammonium hexachlorometallates(IV) (C2H5 NH3)2 [MCl6], M = Sn, Te, show a phase transition at 128.8 K and 204 K, respectively. Both compounds yield a single resonance line in their high temperature phases. In case of the stannate this single 35Cl resonance line splits up into two lines at Tc = 128.8 K, whereas for the tellurate no 35Cl NQR signals could be found in the low temperature phase. A phase transition was also found for the 1.3-propylenediammonium hexa-chlorostannate(IV) at 287 K where the six line NQR spectrum of the low temperature phase changes into a four line spectrum. In contrast, the corresponding plumbate shows no transition. All other compounds studied contain distorted [MCl6]2- octahedra, and therefore they yield more than one 35Cl resonance line. The complexes have been investigated in the temperature range temperature where the lines fade out. In case of the hexachlorostannates(IV) with the ethylammonium, the 1.3-propylenediammonium and the triethylammonium ions, the crystal structures of the compounds are known and compared with the results of the 35Cl NQR spectroscopy.

Annealing Temperature Dependent Structural and Optical Properties of SnO2 Nanoparticles

2016 ◽  
Vol 22 (2) ◽  
pp. 392-394
Author(s):  
Sumit Kumar Behera ◽  
Urmishree Routray ◽  
Jyoshnarani Mohapatra ◽  
Priyadarshini Dash ◽  
G. K. Dash ◽  
...  
Keyword(s):  
Optical Properties ◽  
Annealing Temperature ◽  
Temperature Dependent ◽  
Structural And Optical Properties

Optical properties of InGaAsBi/GaAs strained quantum wells studied by temperature-dependent photoluminescence

2013 ◽  
Vol 22 (3) ◽  
pp. 037802 ◽  
Author(s):  
Yi Gu ◽  
Yong-Gang Zhang ◽  
Yu-Xin Song ◽  
Hong Ye ◽  
Yuan-Ying Cao ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Wells ◽  
Temperature Dependent ◽  
Strained Quantum Wells ◽  
Temperature Dependent Photoluminescence

Temperature-dependent properties of monolayer MoS2 annealed in an Ar diluted S atmosphere: an experimental and first-principles study

2017 ◽  
Vol 5 (42) ◽  
pp. 11138-11143 ◽  
Author(s):  
Lei Wang ◽  
Xiaohong Ji ◽  
Fei Chen ◽  
Qinyuan Zhang
Keyword(s):  
Optical Properties ◽  
First Principles ◽  
Monolayer Mos2 ◽  
Temperature Dependent ◽  
Structural And Optical Properties ◽  
First Principles Study ◽  
Temperature Dependent Properties

Monolayer MoS2 annealed under an Ar diluted S atmosphere exhibited novel structural and optical properties.

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