Effect of Low-Level Boron Doping on Transport Properties of a-Si:H and a-SiGe:H Alloys

1989 ◽  
Vol 149 ◽  
Author(s):  
Liyou Yang ◽  
A. Catalano ◽  
R. R. Arya ◽  
M. S. Bennett ◽  
I. Balberg
Keyword(s):  
Light Intensity ◽  
Transport Properties ◽  
Diffusion Length ◽  
Boron Doping ◽  
Ambipolar Diffusion ◽  
Doping Effect ◽  
Intensity Dependence ◽  
Low Level

ABSTRACTLarge simultaneous changes in ambipolar diffusion length and d.c. photoconductivity are observed with boron doping below 5ppm. We show that the observation can be explained successfully with a model for the doping effect, which is also consistent with earlier studies. The μτ products for both carriers as a function of doping are determined. The light intensity dependence of diffusion length and photoconductivity is also discussed.

A-Si:H Ambipolar Diffusion Length and Effective Lifetime Measured by Flying Spot Technique (FST)

1991 ◽  
Vol 219 ◽  
Author(s):  
M. Vieira ◽  
R. Martins ◽  
E. Fortunato ◽  
F. Soares ◽  
L. Guimaraes
Keyword(s):  
Laser Beam ◽  
Transient Analysis ◽  
Diffusion Length ◽  
Transport Equations ◽  
Ambipolar Diffusion ◽  
Schottky Barriers ◽  
Effective Lifetime ◽  
Asymmetrical Distribution ◽  
Flying Spot

ABSTRACTThe determination of the ambipolar diffusion length, L*, and the effective lifetime, τ*, in p/i and a-Si:H Schottky barriers (ITO/p/a-Si:H/Al-Si; Cr/a-Si:H/Cr/Ag) have been determined by Flying Spot Technique, FST. This technique consists in the transient analysis of the photocurrent/photopotential induced by a laser beam that moves perpendicularly to the structure with a constant motion ratio, at different velocities. Taking into account the competition between the diffusion/drift velocities of the excess carriers and the velocity of the flying spot, it is possible to solve the transport equations and to compute separately L* and τ*, from the asymmetrical distribution responses.

Light-Intensity Dependence In The Kinetics Of N-Gap Photoelectrode Stabilization

2010 ◽  
Vol 89 (3) ◽  
pp. 181-186 ◽  
Author(s):  
F. van Overmeire ◽  
F. Vanden Kerchove ◽  
W. P. Gomes ◽  
F. Cardon
Keyword(s):  
Light Intensity ◽  
Intensity Dependence ◽  
Kinetics Of

Proceedings modelling of SiC-PiN diode with adjust of ambipolar diffusion length

SPEEDAM 2010 ◽  
2010 ◽  
Author(s):  
L. H. Gonzalez ◽  
E. B. Brito ◽  
S. N. Perez ◽  
M. A. Rodriguez ◽  
J. C. Yris
Keyword(s):  
Diffusion Length ◽  
Ambipolar Diffusion ◽  
Pin Diode

Ambipolar diffusion length and photoconductivity measurements on ‘‘midgap’’ hydrogenated microcrystalline silicon

1996 ◽  
Vol 80 (9) ◽  
pp. 5111-5115 ◽  
Author(s):  
M. Goerlitzer ◽  
N. Beck ◽  
P. Torres ◽  
J. Meier ◽  
N. Wyrsch ◽  
...  
Keyword(s):  
Diffusion Length ◽  
Ambipolar Diffusion ◽  
Microcrystalline Silicon

Interactions of Light, Temperature and Moisture on Terbutryn Toxicity

Weed Science ◽  
1971 ◽  
Vol 19 (6) ◽  
pp. 732-735 ◽  
Author(s):  
L. D. Houseworth ◽  
B. G. Tweedy
Keyword(s):  
Light Intensity ◽  
Cucumis Sativus ◽  
Environmental Conditions ◽  
Rapid Growth ◽  
Field Capacity ◽  
Moisture Level ◽  
Low Level ◽  
High Level

Toxicity of soil-applied 2-(tert-butylamino)-4-(ethylamino)-6-(methylthio)-s-triazine (terbutryn) to cucumbers (Cucumis sativusL. ‘Gemni’) and oats (Avena sativusL. ‘Nodaway’) was increased 2.2 times when the light intensity was raised from 11,000 to 22,000 lumens/m2and 1.5 times when the moisture level was raised from low (25 to 50% field capacity) to high (75 to 100% field capacity). When the temperature was raised from the low level (19 C day, 14 C night) to the high level (29 C day, 24 C night) toxicity of terbutryn to oats was increased 1.6 times and toxicity to cucumber was increased 1.3 times. Analysis of interactions of the three variables on toxicity of terbutryn showed that environmental conditions favoring rapid growth resulted in an increase in phytotoxicity.

Light-intensity dependence in photocatalytic decomposition of water over K4Nb6O17 catalyst

1994 ◽  
Vol 28 (2-4) ◽  
pp. 417-422 ◽  
Author(s):  
S. Tabata ◽  
H. Ohnishi ◽  
E. Yagasaki ◽  
M. Ippommatsu ◽  
K. Domen
Keyword(s):  
Light Intensity ◽  
Photocatalytic Decomposition ◽  
Intensity Dependence ◽  
Decomposition Of Water
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