Zero-field mobility, exact mean dwell times, and disorder-induced steps in a Gaussian energy distribution

2001 ◽  
Vol 114 (7) ◽  
pp. 3330-3338 ◽  
Author(s):  
Z. G. Soos ◽  
J. M. Sin
Keyword(s):  
Energy Distribution ◽  
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.

Ion Cyclotron Resonance Collision Frequencies of Alkali Ions in Rare Gases

1974 ◽  
Vol 52 (17) ◽  
pp. 1683-1693 ◽  
Author(s):  
M. Riggin
Keyword(s):  
Distribution Function ◽  
Energy Distribution ◽  
Cyclotron Resonance ◽  
Particle Density ◽  
Energy Distribution Function ◽  
Ion Cyclotron Resonance ◽  
Zero Field ◽  
Ion Cyclotron ◽  
Oscillating Electric Field ◽  
Ionic Energy

An ion cyclotron resonance (ICR) spectrometer was used to estimate collision frequencies of K+ and Na+ ions at near thermal velocities in helium and argon gases. The reduced zero field d.c. drift mobilities were found to be 11.4 and 40.7 cm2 PMU1/2/V s for 39K+ in Ar and He respectively and 11.6 and 42.8 cm2 PMU1/2/V s for Na+ in these gases. The effect of ion-neutral collisions on the energy distribution function for ions at resonance with an oscillating electric field is discussed and the average ionic energy as a function of neutral particle density obtained. In deriving the ICR line shape and ionic energy distribution function it is assumed that the mean time between momentum changing collisions is independent of the relative ion–neutral velocity.

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 .

scholarly journals Statistical mechanics of collisionless relaxation in a non-interacting system

2011 ◽  
Vol 369 (1935) ◽  
pp. 439-452 ◽  
Author(s):  
Pierre de Buyl ◽  
David Mukamel ◽  
Stefano Ruffo
Keyword(s):  
Distribution Function ◽  
Energy Distribution ◽  
Numerical Experiments ◽  
Particle Distribution ◽  
Mean Field ◽  
Integrable Model ◽  
Dynamical Behaviour ◽  
Zero Field ◽  
Stationary States ◽  
Long Range Interactions

We introduce a model of uncoupled pendula, which mimics the dynamical behaviour of the Hamiltonian mean-field (HMF) model. This model has become a paradigm for long-range interactions, such as Coulomb or dipolar forces. As in the HMF model, this simplified integrable model is found to obey the Vlasov equation and to exhibit quasi-stationary states (QSSs), which arise after a ‘collisionless’ relaxation process. Both the magnetization and the single-particle distribution function in these QSSs can be predicted using Lynden-Bell’s theory. The existence of an extra conserved quantity for this model, the energy distribution function, allows us to understand the origin of some discrepancies of the theory with numerical experiments. It also suggests an improvement of Lynden-Bell’s theory, which we fully implement for the zero-field case.

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
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