Crystal-grain size, phonon and carrier mean free paths in the basal plane, and carrier density of graphite films prepared from aromatic polyimide films

TANSO ◽  
2012 ◽  
Vol 2012 (254) ◽  
pp. 176-186 ◽  
Author(s):  
Yoshihiro Hishiyama ◽  
Akira Yoshida ◽  
Yutaka Kaburagi
Keyword(s):  
Grain Size ◽  
Basal Plane ◽  
Carrier Density ◽  
Polyimide Films ◽  
Aromatic Polyimide

Partial Carbonization of Aromatic Polyimide Films

1999 ◽  
Vol 593 ◽  
Author(s):  
M. Doyama ◽  
A. Ichida ◽  
Y. Inoue ◽  
Y. Kogure ◽  
T. Nozaki ◽  
...  
Keyword(s):  
Experimental Data ◽  
Electrical Conductivity ◽  
Hall Coefficient ◽  
Carrier Density ◽  
Carrier Mobility ◽  
Absolute Temperature ◽  
Polyimide Films ◽  
Aromatic Polyimide ◽  
The Absolute

ABSTRACTAromatic polyimide films are partially carbonized between 700°C and 1000°C. Electrical conductivity and Hall coeficient have been measured. Electrical conductivity is higher at higher measuring temperatures. The electrical conductivity σ can be expressed as σ= σ0exp (–E /kT), where k is the Boltzman constant. T is the absolute temperature. E depends upon the carborized temperature. The experimental data show the Hall coefficient RH is negative, and this implies the carriers are negatively charged, i.e. electrons. The specimens are n-type semiconductors. The carrier density η can be expressed by η= A1 exp (–E1/κT) and carrier mobility μ can be expressed by μ = A1exp ( E2/κT). E, E1andE2 depend upon the carbonized temperature

Influence of Nanosized Cerium Oxide on the Thermal Characteristics of Aromatic Polyimide Films

2020 ◽  
Vol 62 (2) ◽  
pp. 196-204
Author(s):  
I. V. Gofman ◽  
A. L. Nikolaeva ◽  
I. V. Abalov ◽  
E. M. Ivan’kova ◽  
I. V. Kuntzman ◽  
...  
Keyword(s):  
Cerium Oxide ◽  
Thermal Characteristics ◽  
Polyimide Films ◽  
Aromatic Polyimide

Molecular Orientation and Photocurrent of Alkyl-Aromatic Polyimide Films Prepared by Vapor Deposition Polymerization

1989 ◽  
Vol 28 (Part 1, No. 12) ◽  
pp. 2552-2555 ◽  
Author(s):  
Kazuo Iida ◽  
Tsukasa Nohara ◽  
Kazuyuki Totani ◽  
Shuhei Nakamura ◽  
Goro Sawa
Keyword(s):  
Vapor Deposition ◽  
Molecular Orientation ◽  
Polyimide Films ◽  
Aromatic Polyimide

Thermal and electrical conductivity and magnetoresistance of graphite films prepared from aromatic polyimide films

Carbon ◽  
2012 ◽  
Vol 50 (13) ◽  
pp. 4984-4985 ◽  
Author(s):  
Yutaka Kaburagi ◽  
Takeshi Kimura ◽  
Akira Yoshida ◽  
Yoshihiro Hishiyama
Keyword(s):  
Electrical Conductivity ◽  
Polyimide Films ◽  
Aromatic Polyimide

Partial carbonization of aromatic polyimide films—aiming at solar cells

2003 ◽  
Vol 99 (1-3) ◽  
pp. 131-133 ◽  
Author(s):  
M Doyama ◽  
Y Takahashi ◽  
H Abe ◽  
Y Inoue ◽  
Y Kogure ◽  
...  
Keyword(s):  
Solar Cells ◽  
Polyimide Films ◽  
Aromatic Polyimide
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