Band Gap Tunability in Semiconductor Nanocrystals by Strain: Size and Temperature Effect

2011 ◽  
Vol 115 (14) ◽  
pp. 6462-6466 ◽  
Author(s):  
Ziming Zhu ◽  
Ai Zhang ◽  
Gang Ouyang ◽  
Guowei Yang
Keyword(s):  
Temperature Effect ◽  
Band Gap ◽  
Semiconductor Nanocrystals

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.

Magnetic ions in wide band gap semiconductor nanocrystals for optimized thermoelectric properties

2014 ◽  
Vol 1 (1) ◽  
pp. 81-86 ◽  
Author(s):  
Chong Xiao ◽  
Kun Li ◽  
Jiajia Zhang ◽  
Wei Tong ◽  
Youwen Liu ◽  
...  
Keyword(s):  
Band Gap ◽  
Thermoelectric Properties ◽  
Semiconductor Nanocrystals ◽  
Wide Band ◽  
Wide Band Gap ◽  
Magnetic Ions

Size dependent optical band gap of ternary I-III-VI2 semiconductor nanocrystals

2009 ◽  
Vol 105 (7) ◽  
pp. 073106 ◽  
Author(s):  
Takahisa Omata ◽  
Katsuhiro Nose ◽  
Shinya Otsuka-Yao-Matsuo
Keyword(s):  
Band Gap ◽  
Optical Band Gap ◽  
Semiconductor Nanocrystals ◽  
Size Dependent

Two-Color Antibunching from Band-Gap Engineered Colloidal Semiconductor Nanocrystals

Nano Letters ◽  
2012 ◽  
Vol 12 (6) ◽  
pp. 2948-2952 ◽  
Author(s):  
Zvicka Deutsch ◽  
Osip Schwartz ◽  
Ron Tenne ◽  
Ronit Popovitz-Biro ◽  
Dan Oron
Keyword(s):  
Band Gap ◽  
Semiconductor Nanocrystals ◽  
Colloidal Semiconductor Nanocrystals ◽  
Colloidal Semiconductor

ChemInform Abstract: Synthesis of Shape-Controlled Monodisperse Wurtzite CuInxGa1-xS2 Semiconductor Nanocrystals with Tunable Band Gap.

ChemInform ◽  
2011 ◽  
Vol 42 (41) ◽  
pp. no-no ◽  
Author(s):  
Yu-Hsiang A. Wang ◽  
Xiaoyan Zhang ◽  
Ningzhong Bao ◽  
Baoping Lin ◽  
Arunava Gupta
Keyword(s):  
Band Gap ◽  
Semiconductor Nanocrystals ◽  
Shape Controlled ◽  
Tunable Band Gap
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