scholarly journals Effect of access resistance on the experimentally measured temperature–carrier mobility dependence in highly-crystalline DNTT-based transistors

2020 ◽  
Vol 1 (6) ◽  
pp. 1799-1804
Author(s):  
Qijing Wang ◽  
Sai Jiang ◽  
Yi Shi ◽  
Yun Li
Keyword(s):  
Temperature Dependence ◽  
Carrier Mobility ◽  
Molecular Packing ◽  
Measured Temperature ◽  
Access Resistance

The carrier mobility–temperature dependence obtained from DNTT OFETs can be tuned by the access resistance and the molecular packing in bulk regime.

Silver Self-Diffusion in Al2O3/QE22 Magnesium Alloy Matrix Composite

2009 ◽  
Vol 283-286 ◽  
pp. 155-160
Author(s):  
Ivo Stloukal ◽  
Jiří Čermák
Keyword(s):  
Magnesium Alloy ◽  
Temperature Dependence ◽  
Temperature Interval ◽  
Matrix Composite ◽  
Diffusion Coefficients ◽  
Volume Diffusion ◽  
Effective Diffusion ◽  
Measured Temperature ◽  
Alloy Matrix ◽  
Self Diffusion

Self-diffusion of 110mAg has been investigated in fiber reinforced QE22 magnesium alloy matrix composite. Short Saffil fibers (97% -Al2O3 + 3% SiO2) were used as reinforcement. The diffusion measurements were carried out in the temperature interval 648 – 728 K by serial sectioning method. The volume diffusion coefficients Dv (alloy without reinforcement) and the effective diffusion coefficients Deff (alloy with reinforcement) were obtained by analysis of the penetration curves. The silver diffusion coefficient in the interface boundary matrix/Saffil Di was also estimated. The temperature dependence of volume diffusion coefficients Dv was compared with previous data measured using 65Zn in the same alloy and with literature data for Zn impurity diffusion in Mg single crystal. It was observed, that the temperature dependence of both Deff and Di was significantly non-linear in the measured temperature interval. This behavior supports previous observations with zinc diffusion in the same alloy.

scholarly journals Resistivity and Carrier Mobility of the SmBa2 Cu3 O6+x Superconductor with Different Oxygen Doping Levels

1999 ◽  
Vol 54 (2) ◽  
pp. 95-100 ◽  
Author(s):  
G. Spinolo ◽  
P. Ghigna ◽  
G. Chiodelli ◽  
M. Ferretti ◽  
G. Flor
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Oxygen Pressure ◽  
Anderson Localization ◽  
Carrier Mobility ◽  
Hole Mobility ◽  
Dc Conductivity ◽  
Sudden Increase ◽  
Conductivity Measurements ◽  
Oxygen Doping

Abstract DC conductivity measurements between 15 and 300 K are reported for SmBa2 Cu3O6+x samples with different oxygen doping amounts (x) produced by annealing under appropriate high temperature and oxygen pressure conditions and quenching. Samples with x≥0.5 are superconductors: Tc ~60 K at x=0.7, Tc >80 K at ; x=0.9. The transition from superconduction to non-superconduction corresponds to the tetragonal to orthorhombic structural tran-sition and to the transition from semiconducting to metallic temperature dependence of the resistivity. Oxygen doping causes a sudden increase of hole mobility near x=0.5. Below this threshold, the be-havior of the carrier mobility is in agreement with an Anderson localization.

N- and P-Type Building Blocks for Organic Electronics Based on Oligothiophene Cores

2003 ◽  
Vol 771 ◽  
Author(s):  
Antonio Facchetti ◽  
Myung-Han Yoon ◽  
Howard E. Katz ◽  
Melissa Mushrush ◽  
Tobin J. Marks
Keyword(s):  
Organic Semiconductors ◽  
Organic Electronics ◽  
Carrier Mobility ◽  
Building Blocks ◽  
Molecular Packing ◽  
Conjugation Length ◽  
Π Interactions ◽  
P Type ◽  
The Impact ◽  
Homo Lumo

AbstractOrganic semiconductors exhibiting complementary-type carrier mobility are the key components for the development of the field of “gplastic electronics” We present here a novel series of α,ω- and isomerically pure ββ'-diperfluorohexyl-substituted thiophene and study the impact of fluoroalkyl substitution and conjugation length vis-a-vis the corresponding fluorinefree analogues. Trends between the fluorinated and fluorine-free families in molecular packing, HOMO-LUMO gap, and π-π interactions are found to be strikingly similar. TFT measurements indicate that all members of the fluorinated series are n-type semiconductors

scholarly journals Benzotrithiophene Copolymers: Influence of Molecular Packing and Energy Levels on Charge Carrier Mobility

2014 ◽  
Vol 47 (9) ◽  
pp. 2883-2890 ◽  
Author(s):  
Bob C. Schroeder ◽  
Stephan Rossbauer ◽  
R. Joseph Kline ◽  
Laure Biniek ◽  
Scott E. Watkins ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Energy Levels ◽  
Charge Carrier Mobility ◽  
Molecular Packing

Magnetic, electrical, and thermal characterization of La0.9Te0.1Mn1−xCoxO3 (0 ≤ x ≤ 1)

2007 ◽  
Vol 22 (10) ◽  
pp. 2943-2952
Author(s):  
R. Ang ◽  
Y.P. Sun ◽  
G.H. Zheng ◽  
W.H. Song
Keyword(s):  
Temperature Dependence ◽  
Temperature Region ◽  
Configurational Entropy ◽  
Thermal Characterization ◽  
Measured Temperature ◽  
Magnetic Exchange ◽  
Space Group ◽  
Co Doping ◽  
Jahn Teller ◽  
Anomalous Peak

The structure, magnetization M, resistivity ρ, thermoelectric power S, and thermal conductivity κ in La0.9Te0.1Mn1−xCoxO3 (0 ≤ x ≤ 1) have been investigated systematically. The samples with x = 0 and x = 1 have a rhombohedral lattice with space group R¯3C, while the samples with x = 0.25, 0.50, and 0.75 have an orthorhombic lattice with space group Pbnm. The samples of 0 ≤ x ≤ 0.75 undergo the paramagnetic–ferromagnetic (PM–FM) phase transition. Based on the temperature dependence of susceptibility, a combination of the high-spin (HS) state for Co2+ and the low-spin (LS) state for Co3+ can be determined. The metal–insulator transitions (MIT) observed for x = 0 sample are completely suppressed with Co-doping, and ρ(T) displays semiconducting behavior within the measured temperature region for x > 0 samples. As x ⩾ 0.25, the huge magnitude of Seebeck coefficient at low temperatures is observed, which is suggested to originate from the spin-state transition of Co3+ ions from intermediate-spin (IS) state or (HS) state to (LS) state and the configurational entropy of charge carriers enhanced by their spin and orbital degeneracy between Co2+ and Co3+ sites. Particularly, S(T) of x = 0.50 and 0.75 samples appears an anomalous peak, which is suggested to be related to the contribution of phonon drag. Similar to M(T) and ρ(T), all results of S(T) are discussed according to the variations of the structure parameters and magnetic exchange interaction caused by Co-doping. In addition, based on the analysis of the temperature dependence of S(T) and ρ(T), the transport mechanism can be determined in the different temperature region. As to thermal conduction κ(T), the changes of κ with Co-doping is suggested to come from the combined effect due to the suppression of local Mn3+O6 Jahn–Teller (JT) lattice distortion because of the substitution of non JT Co3+ ions with LS and HS states for JT Mn3+ ions, which results in the increase of κ, and the introduction of the disorder due to Co-doping, which contributes to the decrease of κ.

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