Red- and blue-light emission from free-standing porous silicon

1996 ◽  
Vol 18 (10) ◽  
pp. 1149-1157 ◽  
Author(s):  
S. Puccini ◽  
V. Pellegrini ◽  
M. Labardi ◽  
F. Fuso ◽  
M. Allegrini ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Free Standing ◽  
Blue Light Emission

LUMINESCENCE BEHAVIOR AND MECHANISM OF LIGHT-EMITTING POROUS SILICON

1994 ◽  
Vol 08 (02) ◽  
pp. 69-92 ◽  
Author(s):  
XUN WANG
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Energy State ◽  
Surface Recombination Velocity ◽  
Luminescence Spectroscopy ◽  
Carrier Injection ◽  
Blue Light Emission ◽  
Light Emitting ◽  
Si Nanostructures

In this review article, we give a new insight into the luminescence mechanism of porous silicon. First, we observed a “pinning” characteristic of photoluminescent peaks for as-etched porous silicon samples. It was explained as resulting from the discontinuous variation of the size of Si nanostructures, i.e. the size quantization. A tight-binding calculation of the energy band gap widening versus the dimension of nanoscale Si based on the closed-shell Si cluster model agrees well with the experimental observations. Second, the blue-light emission from porous silicon was achieved by using boiling water treatment. By investigating the luminescence micrographic images and the decaying behaviors of PL spectra, it has been shown that the blue-light emission is believed to be originated from the porous silicon skeleton rather than the surface contaminations. The conditions for achieving blue light need proper size of Si nanostructures, low-surface recombination velocity, and mechanically strong skeleton. The fulfillment of these conditions simultaneously is possible but rather critical. Third, the exciton dynamics in light-emitting porous silicon is studied by using the temperature-dependent and picosecond time-resolved luminescence spectroscopy. A direct evidence of the existence of confined excitons induced by the quantum size effect has been revealed. Two excitation states are found to be responsible for the visible light emission, i.e. a higher lying energy state corresponding to the confined excitons in Si nanostructures and a lower lying state related with surfaces of Si wires or dots. A picture of the carrier transfer between the quantum confined state and the surface localized state has been proposed. Finally, we investigated the transient electroluminescence behaviors of Au/porous silicon/Si/Al structure and found it is very similar to that of an ordinary p-n junction light-emitting diode. The mechanism of electroluminescence is explained as the carrier injection through the Au/porous silicon Schotky barrier and the porous silicon/p-Si heterojunction into the corrugated Si wires, where the radiative recombination of carriers occurs.

Enhanced Blue-Light Emission from an Indium-Treated Porous Silicon Device

1994 ◽  
Vol 33 (Part 1, No. 11) ◽  
pp. 6075-6077 ◽  
Author(s):  
Peter Steiner ◽  
Frank Kozlowski ◽  
Marek Wielunski ◽  
Walter Lang
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Blue Light Emission ◽  
Silicon Device

Intense blue-light emission from carbon-plasma-implanted porous silicon

2001 ◽  
Vol 78 (1) ◽  
pp. 37-39 ◽  
Author(s):  
Weili Liu ◽  
Miao Zhang ◽  
Chenglu Lin ◽  
Zhaoming Zeng ◽  
Lianwei Wang ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Blue Light Emission ◽  
Carbon Plasma

Annealing and amorphous silicon passivation of porous silicon with blue light emission

2005 ◽  
Vol 252 (4) ◽  
pp. 1065-1069 ◽  
Author(s):  
Yue Zhao ◽  
Deren Yang ◽  
Dongsheng Li ◽  
Minghua Jiang
Keyword(s):  
Porous Silicon ◽  
Amorphous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Blue Light Emission

scholarly journals BLUE LIGHT EMISSION FROM POROUS SILICON AND PHOTOLUMINESCENCE MECHANISM

1996 ◽  
Vol 45 (1) ◽  
pp. 121
Author(s):  
LIN JUN ◽  
ZHANG LI-ZHU ◽  
CHEN ZHI-JIAN ◽  
SONG HAI-ZHI ◽  
YAO DE-CHENG ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Blue Light Emission ◽  
Photoluminescence Mechanism

Blue Light Emission from Porous Silicon

1992 ◽  
Vol 283 ◽  
Author(s):  
X. Y. Hou ◽  
G. Shi ◽  
W. Wang ◽  
F. L. Zhang ◽  
P. H. Hao ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Green Light ◽  
Blue Shift ◽  
Blue Light Emission ◽  
Light Emitting ◽  
Visible Luminescence ◽  
Infrared Reflection ◽  
Green Light Emission

ABSTRACTThrough a post treatment of light emitting porous silicon in boilingwater, a large blue shift of its photoluminescence (PL) spectrum hasbeen observed and a stable blue-green light emission at the peak wavelength down to 500 nm is achieved. The effect of boiling water treatment is suggested to be a kind of oxidation, which could reduce thesize of the Si column, fill up some micropores and strengthen the Siskeleton. The photoluminescence microscopic observation shows that the surface of blue light emitting porous silicon is composed of manysmall uniformly light-emitting domains at the size of several tens of μm. Fourier transform infrared reflection (FTIR) measurements show that the formation of Si-H bonds is not responsible for the visible luminescence in the very thin Si wires.

Blue Light Emission from Rapid-Thermal-Oxidized Porous Silicon

1993 ◽  
Author(s):  
T. Futagi ◽  
T. Matsumoto ◽  
H. Mimura ◽  
Y. Kanemitsu
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Blue Light Emission ◽  
Oxidized Porous Silicon

Blue-light emission from porous silicon induced by laser irradiation

2005 ◽  
Vol 59 (19-20) ◽  
pp. 2394-2397 ◽  
Author(s):  
J. Sun ◽  
Y.W. Lu ◽  
X.W. Du ◽  
S.A. Kulinich
Keyword(s):  
Porous Silicon ◽  
Laser Irradiation ◽  
Blue Light ◽  
Light Emission ◽  
Blue Light Emission

A way to obtain visible blue light emission in porous silicon

2003 ◽  
Vol 82 (7) ◽  
pp. 1018-1020 ◽  
Author(s):  
Q. W. Chen ◽  
D. L. Zhu ◽  
C. Zhu ◽  
J. Wang ◽  
Y. G. Zhang
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Blue Light Emission
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