Quantum Confinement in Single Layer a-Si:H Films

1996 ◽  
Vol 420 ◽  
Author(s):  
S. A. Koehler ◽  
H. Fritzsche
Keyword(s):  
Film Thickness ◽  
Amorphous Silicon ◽  
Transmission Spectrum ◽  
Coherence Length ◽  
Quantum Confinement ◽  
Room Temperature ◽  
Single Layer ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Careful Investigation

AbstractQuantum confinement effects in the transmission spectrum of thin amorphous silicon, a-Si:H, films require a coherence length comparable to the film thickness, as well as good film homogeneity. After a careful investigation, we conclude that there is no quantum confinement in single layer a-Si:H films at room temperature.

Observation of quantum confinement effects in strained Si0.84Ge0.16/Si quantum wells at room temperature

1993 ◽  
Vol 62 (21) ◽  
pp. 2713-2715 ◽  
Author(s):  
Y. F. Chen ◽  
Y. T. Dai ◽  
H. P. Chou ◽  
D. C. Chang ◽  
C. Y. Chang ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Quantum Confinement ◽  
Room Temperature ◽  
Confinement Effects ◽  
Quantum Confinement Effects

Preparation of Amorphous Silicon Carbide Nanostructures via Solvothermal Method

2014 ◽  
Vol 597 ◽  
pp. 49-52
Author(s):  
Huan Xiang Li ◽  
Gong Yi Li ◽  
Tian Jiao Hu ◽  
Xiao Dong Li ◽  
Yun Quan Yang
Keyword(s):  
Silicon Carbide ◽  
Amorphous Silicon ◽  
Trace Amount ◽  
Quantum Confinement ◽  
Solvothermal Method ◽  
Excitation Wavelength ◽  
Confinement Effects ◽  
Amorphous Silicon Carbide ◽  
Quantum Confinement Effects

A solvothermal method was developed to synthesize silicon carbide nanoflakes and nanowires through pyrolysis of polymethylsilane (PMS) at 550 °C in solution. Evidences from HRTEM, SAED, FTIR and XPS indicated that the products were amorphous nanostructures which mainly consisted of Si, C elements and trace amount O element. Owing to concrete quantum confinement effects, the unique nanostructures have strong photoluminescence centered at 410-430 nm under excitation wavelength of 350 nm

scholarly journals Observation of Quantum Confinement Effects with cmd="newline" Ultrashort Excitation in the Vicinity of Direct Critical Points cmd="newline" in Silicon Nanofilms

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Andreas Othonos ◽  
Demetra Tsokkou ◽  
Emmanouil Lioudakis
Keyword(s):  
Film Thickness ◽  
Critical Points ◽  
Quantum Confinement ◽  
Transient Absorption ◽  
Energy Curve ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Uv Excitation ◽  
State Filling ◽  
Absorption Measurements

We report on the observation of quantum confinement effects and the influence of surface-related states due to the formation of nanograins on ultrashort relaxation near the direct critical points of silicon nanofilms following UV-excitation. Direct photoexcitation of the samples in the vicinity of the critical points of the first Brillouin zone has been achieved using femtosecond pulses in the spectra range of 290–400 nm. Transient absorption measurements show a substantial enhancement of state filling with decreasing the film thickness down to 5 nm due to quantum confinement in the z-direction. Furthermore, the state filling of surface-related states of nanograins suggests that the critical points of these states follow the ellipsometry extracted energy-curve.

Room-Temperature Quantum Confinement Effects in Transport Properties of Ultrathin Si Nanowire Field-Effect Transistors

Nano Letters ◽  
2011 ◽  
Vol 11 (12) ◽  
pp. 5465-5470 ◽  
Author(s):  
Kyung Soo Yi ◽  
Krutarth Trivedi ◽  
Herman C. Floresca ◽  
Hyungsang Yuk ◽  
Walter Hu ◽  
...  
Keyword(s):  
Transport Properties ◽  
Quantum Confinement ◽  
Field Effect ◽  
Room Temperature ◽  
Field Effect Transistors ◽  
Confinement Effects ◽  
Si Nanowire ◽  
Quantum Confinement Effects

Quantum confinement effects and strain-induced band-gap energy shifts in core-shell Si-SiO2nanowires

2011 ◽  
Vol 83 (24) ◽  
Author(s):  
O. Demichel ◽  
V. Calvo ◽  
P. Noé ◽  
B. Salem ◽  
P.-F. Fazzini ◽  
...  
Keyword(s):  
Band Gap ◽  
Quantum Confinement ◽  
Band Gap Energy ◽  
Core Shell ◽  
Confinement Effects ◽  
Gap Energy ◽  
Quantum Confinement Effects

Quantum Confinement Effects in Organic Lead Tribromide Perovskite Nanoparticles

2016 ◽  
Vol 120 (32) ◽  
pp. 18333-18339 ◽  
Author(s):  
Prashant Kumar ◽  
Chinnadurai Muthu ◽  
Vijayakumar C. Nair ◽  
K. S. Narayan
Keyword(s):  
Quantum Confinement ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Organic Lead ◽  
Perovskite Nanoparticles
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