Modified variational calculation of the zero field mobility of polar semiconductors

1968 ◽  
Vol 217 (2) ◽  
pp. 150-154 ◽  
Author(s):  
W. Heinle
Keyword(s):  
Variational Calculation ◽  
Zero Field ◽  
Field Mobility

Hole transport parameters in a PTOPT based organic solar cell

2010 ◽  
Vol 88 (4) ◽  
pp. 253-256 ◽  
Author(s):  
Bizuneh Gebremichael ◽  
Genene Tessema
Keyword(s):  
Organic Solar Cell ◽  
Hole Transport ◽  
Zero Field ◽  
Transport Parameters ◽  
Limited Region ◽  
Electric Field Dependence ◽  
Pv Cell ◽  
Activation Factor ◽  
Field Mobility ◽  
Sandwich Type

The photovoltaic and charge transport properties of solar cells whose active layer is made from poly[3-(4-octylphenyl)-2, 2′-bithiophene](PTOPT) was studied. Devices are prepared in a sandwich-type structure of the form Al/PTOPT/PEDOT:PSS/ITO. The diodes showed good rectification needed for the PV cell. The symmetric nature of the semilogarithmic J–V plot under dark and low temperature reveals that there is a unipolar charge injection in both sides of the electrodes. Based on the space charge limited region J–V data, it was possible to study the electric field dependence of the hole transport, which enable us to derive important parameters such as the zero field mobility (μo) and the field activation factor (γ).

Zero‐field mobility of excess electrons in dense methane gas

1977 ◽  
Vol 67 (10) ◽  
pp. 4636-4639 ◽  
Author(s):  
Ned E. Cipollini ◽  
Richard A. Holroyd ◽  
Masaru Nishikawa
Keyword(s):  
Zero Field ◽  
Methane Gas ◽  
Field Mobility ◽  
Excess Electrons

Electron recombination and diffusion in CO at elevated temperature

1969 ◽  
Vol 47 (17) ◽  
pp. 1789-1795 ◽  
Author(s):  
Michael H. Mentzoni ◽  
James Donohoe
Keyword(s):  
Room Temperature ◽  
Diagnostic Techniques ◽  
Zero Field ◽  
Time Decay ◽  
Electron Recombination ◽  
Average Temperature ◽  
Field Mobility ◽  
Ion Recombination ◽  
Pressure Interval ◽  
And Diffusion

The electron time decay in an afterglow following a short pulsed d.c. discharge in CO has been investigated using microwave diagnostic techniques. The gas was heated to an average temperature of 775 °K. Two-body electron-ion recombination and ambipolar diffusion were found to be the only important electron removal mechanisms present in the pressure interval [Formula: see text] Torr with the rate constants αr = 3.9 × 10−7 cm3 s−1 and Dap0 = 372 cm2 s−1 Torr respectively. If we postulate a T−γ dependence for αr, comparison with room temperature results yields γ = 0.57. The diffusion coefficient appears to increase strongly with temperature based upon an estimated zero field mobility for CO+in CO at 273 °K found in the literature.

scholarly journals The Mobility of Li + Ions in Helium and Argon

1985 ◽  
Vol 38 (4) ◽  
pp. 587 ◽  
Author(s):  
RA Cassidy ◽  
MT Elford
Keyword(s):  
Thermal Equilibrium ◽  
Drift Tube ◽  
Cluster Ions ◽  
Zero Field ◽  
Number Density ◽  
Field Mobility ◽  
Mass Spectrometer System ◽  
Cluster Ion ◽  
Spectrometer System ◽  
Reduced Mobility

A drift tube-mass spectrometer system employing Bradbury-Nielsen shutters has been used to measure the mobility of Li + ions in He at 294 and 80 K and Li + ions in Ar at 294 K. The E/N range used was 3 to 80 Td (1 Td == 10 - 21 Y cm2). The zero field reduced mobility for Li + in He was found to be 22�81�0�11 cm2 y-1 s-I at 294 K and 19�64�0�29 cm2 y-1 s-I at 80 K. The value for Li+ in Ar at 294 K is 4�66�0�22 cm2 y-1 s-I. The reduced zero field mobility for the cluster ion Li +. He in He at 80 K and low values of E/ N was found to be 14�84 � 0�22 cm2 y -I s - I. The equilibrium constant for the formation and dissociation of Li + . Ar cluster ions at 294 K was obtained by fitting to the variation of the measured mobility with gas number density at low E/N values. The value obtained, corresponding to thermal equilibrium at 294 K, was (4�0.5)xlO- 19 cm3 .

Hot-electron zero-field mobility and diffusion in rare-gas moderators

1985 ◽  
Vol 31 (3) ◽  
pp. 1894-1905 ◽  
Author(s):  
Darryl R. A. McMahon ◽  
Bernie Shizgal
Keyword(s):  
Rare Gas ◽  
Zero Field ◽  
Hot Electron ◽  
Field Mobility ◽  
And Diffusion

scholarly journals Zero-field Mobility for Electrons in Dry and Humid Air

1975 ◽  
Vol 28 (2) ◽  
pp. 231 ◽  
Author(s):  
HB Milloy ◽  
ID Reid ◽  
RW Crompton
Keyword(s):  
Relative Humidity ◽  
Momentum Transfer ◽  
Water Vapour ◽  
Cross Section ◽  
Drift Tube ◽  
Zero Field ◽  
Humid Air ◽  
Dry Air ◽  
Field Mobility ◽  
Momentum Transfer Cross Section

The zero-field mobility of electrons in dry and humid air at 294 K has been studied with drift tube techniques. For air containing 1.5 % water vapour (50 % relative humidity) the zero-field mobility was found to be 8.4 � 0.2 X 105 cm s−l Td−l. The zero-field mobility of electrons in dry air (4.7 � 0.2 x 106 cm s−l Td−l) was deduced from measurements in which small quantities of CO2 Were added to reduce the electron energy. It is estimated that the momentum transfer cross section for electron–oxygen collisions, at near thermal energies, is at least four times smaller than it is for electron–nitrogen collisions.

Zero-Field Mobility of an Excess Electron in Fluid Argon

1971 ◽  
Vol 3 (2) ◽  
pp. 734-752 ◽  
Author(s):  
James A. Jahnke ◽  
Lothar Meyer ◽  
Stuart A. Rice
Keyword(s):  
Excess Electron ◽  
Zero Field ◽  
Field Mobility ◽  
Fluid Argon

Effect of thermal annealing on grain boundary chemistry of polycrystalline TiBa2Ca2Cu3Oy films

1994 ◽  
Vol 52 ◽  
pp. 968-969
Author(s):  
Z. L. Wang ◽  
C. L. Briant ◽  
J. DeLuca ◽  
A. Goyal ◽  
D. M. Kroeger ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Weak Link ◽  
Zero Field ◽  
Stabilized Zirconia ◽  
Local Texture ◽  
Transmission Electron ◽  
Axis Alignment ◽  
Boundary Chemistry ◽  
Small Misorientation ◽  
Misorientation Angles

Recent studies have shown that spray-pyrolyzed films of the Tl-1223 compound (TlxBa2Ca2Cu3Oy, with 0.7 < × < 0.95) on polycrystalline yttrium stabilized zirconia substrates can be prepared which have critical current density Jc near 105 A/cm2 at 77 K, in zero field. The films are polycrystalline, have excellent c-axis alignment, and show little evidence of weak-link behavior. Transmission electron microscopy (TEM) studies have shown that most grain boundaries have small misorientation angles. It has been found that the films have a nigh degree of local texture indicative of colonies of similarly oriented grains. It is believed that inter-colony conduction is enhanced by a percolative network of small angle boundaries at colony interfaces. It has also been found that Jc is increased by a factor of 4 - 5 after the films were annealed at 600 °C in oxygen. This study is thus carried out to determine the effect on grain boundary chemistry of the heat treatment.

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