Growth and optical properties of Fe 2 O 3 thin films: A study of quantum confinement effects by experiment and theory

2017 ◽  
Vol 89 ◽  
pp. 67-71 ◽  
Author(s):  
C.S. Garoufalis ◽  
P. Poulopoulos ◽  
N. Bouropoulos ◽  
A. Barnasas ◽  
S. Baskoutas
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Quantum Confinement Effects

QUANTUM CONFINEMENT EFFECTS ON THE OPTICAL PROPERTIES OF ION BEAM SPUTTERED NICKEL OXIDE THIN FILMS

2001 ◽  
Vol 15 (02) ◽  
pp. 191-200 ◽  
Author(s):  
M. GHANASHYAM KRISHNA ◽  
A. K. BHATTACHARYA
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nickel Oxide ◽  
Band Gap ◽  
Quantum Confinement ◽  
Ion Beam ◽  
Confinement Effects ◽  
Oxide Thin Films ◽  
Quantum Confinement Effects ◽  
Nickel Oxide Thin Films

Quantum confinement effects on the optical properties of ion beam sputtered nickel oxide thin films are reported. Thin films with crystallite sizes in the range 9 to 14 nm have been deposited on to fused silica substrates. There is an increase in band gap, from 3.4 to 3.9 eV, and a decrease in refractive index, from 2.4 to 1.6, with decrease in crystallite size, that can be attributed to quantum confinement effects. The effective mass approximation has been used to explain the observed behaviour in band gap variation.

Intense Quantum Confinement Effects in Cu2O Thin Films

2011 ◽  
Vol 115 (30) ◽  
pp. 14839-14843 ◽  
Author(s):  
Panagiotis Poulopoulos ◽  
Sotirios Baskoutas ◽  
Spiridon D. Pappas ◽  
Christos S. Garoufalis ◽  
Sotirios A. Droulias ◽  
...  
Keyword(s):  
Thin Films ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Cu2o Thin Films

Evaluation of Optical Properties for Nanocrystal Si Dot Layers Fabricated by CVD as a Function of Size Reduction

2012 ◽  
Vol 725 ◽  
pp. 251-254
Author(s):  
Yuki Mizukami ◽  
D. Kosemura ◽  
M. Takei ◽  
Y. Numasawa ◽  
Y. Ohshita ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Optical Properties ◽  
Quantum Confinement ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
X Ray Diffraction ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Transmission Electron

Raman spectroscopy and photoluminescence were performed in order to understand the optical properties of nanocrystal Si in relation to quantum confinement effects. The nanocrystal Si (nc-Si) dots in the SiO2 layer were fabricated by the H2 plasma treatment and chemical vapour deposition followed by the oxidation of the nc-Si dots surface. The post-annealing was also performed to improve the crystalline quality of nc-Si at 1050 °C for 5 and 10 min. There is a good correlation of the quantum confinement effects between the results of Raman spectroscopy and photoluminescence. The Raman spectra from nc-Si were analysed using the model of Richter et al. As a result, the sizes of the nc-Si dots were consistent with those obtained by transmission electron microscopy and X-ray diffraction. Moreover, the compressive stress in the nc-Si dots were evaluated which was induced by the SiO2 surroundings.

Quantum size effects on the optical properties of nc-Si QDs embedded in an a-SiOx matrix synthesized by spontaneous plasma processing

2015 ◽  
Vol 17 (7) ◽  
pp. 5063-5071 ◽  
Author(s):  
Debajyoti Das ◽  
Arup Samanta
Keyword(s):  
Optical Properties ◽  
Size Effects ◽  
Quantum Confinement ◽  
Plasma Processing ◽  
Blue Shift ◽  
Quantum Size Effects ◽  
Confinement Effects ◽  
Quantum Size ◽  
Quantum Confinement Effects ◽  
Stokes Shifts

An energy blue shift due to quantum confinement effects in tiny nc-Si QDs accompanied by larger Stokes shifts in PL at smaller dimensions.

Optical properties of thePb2+-based aggregated phase in a CsCl host crystal: Quantum-confinement effects

1995 ◽  
Vol 51 (8) ◽  
pp. 5192-5199 ◽  
Author(s):  
M. Nikl ◽  
K. Nitsch ◽  
K. Polak ◽  
G. P. Pazzi ◽  
P. Fabeni ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Confinement ◽  
Host Crystal ◽  
Confinement Effects ◽  
Quantum Confinement Effects
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