Temperature Dependence of Phonon Modes, Optical Constants, and Optical Band Gap in Two-Dimensional ReS2 Films

2018 ◽  
Vol 122 (51) ◽  
pp. 29464-29469
Author(s):  
Keyang Zhao ◽  
Fanming Huang ◽  
Chen-Min Dai ◽  
Wenwu Li ◽  
Shi-You Chen ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Band Gap ◽  
Optical Constants ◽  
Optical Band Gap ◽  
Two Dimensional ◽  
Phonon Modes

scholarly journals Resonance and antiresonance in Raman scattering in GaSe and InSe crystals

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
M. Osiekowicz ◽  
D. Staszczuk ◽  
K. Olkowska-Pucko ◽  
Ł. Kipczak ◽  
M. Grzeszczyk ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Temperature Effect ◽  
Band Gap ◽  
Raman Spectra ◽  
Quantum Interference ◽  
Optical Band Gap ◽  
Phonon Coupling ◽  
Phonon Modes ◽  
Electron Phonon Coupling ◽  
Resonant Raman

AbstractThe temperature effect on the Raman scattering efficiency is investigated in $$\varepsilon$$ ε -GaSe and $$\gamma$$ γ -InSe crystals. We found that varying the temperature over a broad range from 5 to 350 K permits to achieve both the resonant conditions and the antiresonance behaviour in Raman scattering of the studied materials. The resonant conditions of Raman scattering are observed at about 270 K under the 1.96 eV excitation for GaSe due to the energy proximity of the optical band gap. In the case of InSe, the resonant Raman spectra are apparent at about 50 and 270 K under correspondingly the 2.41 eV and 2.54 eV excitations as a result of the energy proximity of the so-called B transition. Interestingly, the observed resonances for both materials are followed by an antiresonance behaviour noticeable at higher temperatures than the detected resonances. The significant variations of phonon-modes intensities can be explained in terms of electron-phonon coupling and quantum interference of contributions from different points of the Brillouin zone.

scholarly journals From Anomalous to Normal: Temperature Dependence of the Band Gap in Two-Dimensional Black Phosphorus

2020 ◽  
Vol 125 (15) ◽  
Author(s):  
Shenyang Huang ◽  
Fanjie Wang ◽  
Guowei Zhang ◽  
Chaoyu Song ◽  
Yuchen Lei ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Band Gap ◽  
Black Phosphorus ◽  
Two Dimensional

Optical band gap and dispersion of optical constants of Cu-Ga-S thin films

Optik ◽  
2019 ◽  
Vol 186 ◽  
pp. 147-154 ◽  
Author(s):  
M. Isik ◽  
H.H. Gullu ◽  
E. Coskun ◽  
N.M. Gasanly
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Optical Constants ◽  
Optical Band Gap

Two-dimensional CdS intercalated ZnO nanorods: a concise study on interfacial band structure modification

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 52395-52402 ◽  
Author(s):  
Hind Fadhil Oleiwi ◽  
Sin Tee Tan ◽  
Hock Beng Lee ◽  
Chi Chin Yap ◽  
Riski Titian Ginting ◽  
...  
Keyword(s):  
Solar Cell ◽  
Band Structure ◽  
Band Gap ◽  
Optical Band Gap ◽  
Zno Nanorods ◽  
Cell Performance ◽  
Two Dimensional ◽  
Structure Modification ◽  
Solar Cell Performance

The intercalation of CdS on ZnO nanorods modified the optical band gap effectively and improved the solar cell performance significantly.

Modulating the Optical Band Gap of Small Semiconducting Two-Dimensional Materials by Conjugated Polymers

Langmuir ◽  
2020 ◽  
Vol 36 (10) ◽  
pp. 2574-2583 ◽  
Author(s):  
Chih-Kai Liao ◽  
Jasmine Phan ◽  
Heber Martinez-Barron ◽  
Mahmoud A. Mahmoud
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Optical Band Gap ◽  
Two Dimensional ◽  
Two Dimensional Materials
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