Polaron states and associated optical absorption in an emeraldine-base polymer with 4n ± 1 nitrogen sites

2003 ◽  
Vol 237 (2) ◽  
pp. 558-563
Author(s):  
Y. Zhang ◽  
J. Liu ◽  
W. L. Yu
Keyword(s):  
Optical Absorption ◽  
Emeraldine Base ◽  
Base Polymer

Anisotropic optical properties of an oriented-emeraldine-base polymer and an emeraldine-hydrochloride-salt polymer

1994 ◽  
Vol 50 (8) ◽  
pp. 5094-5100 ◽  
Author(s):  
R. P. McCall ◽  
E. M. Scherr ◽  
A. G. MacDiarmid ◽  
A. J. Epstein
Keyword(s):  
Optical Properties ◽  
Emeraldine Base ◽  
Hydrochloride Salt ◽  
Base Polymer

Free-End Boundary Condition and Exciton of an Emeraldine-Base Polymer

2002 ◽  
Vol 231 (1) ◽  
pp. 256-262 ◽  
Author(s):  
Y. Zhang ◽  
J. Liu ◽  
W.L. Yu ◽  
D.H. Huang ◽  
H. Li
Keyword(s):  
Boundary Condition ◽  
Emeraldine Base ◽  
Base Polymer

Nonlinear Optical Properties of Polyaniline

1987 ◽  
Vol 109 ◽  
Author(s):  
A. J. Epstein ◽  
J. M. Ginder ◽  
M. G. Roe ◽  
T. L. Gustafson ◽  
M. Angelopoulos ◽  
...  
Keyword(s):  
Optical Properties ◽  
Laser Intensity ◽  
Emeraldine Base ◽  
Photoinduced Absorption ◽  
Salt Form ◽  
Time Resolved ◽  
Base Form ◽  
Exciton Decay ◽  
Base Polymer ◽  
Molecular Excitons

ABSTRACTPolyaniline is a family of polymers whose electronic and optical properties can be controlled through variation of the number of electrons and protons on the polymer chain. For example, the emeraldine base form of the polymer (EB) is insulating while the emeraldine salt form (ES) is metallic. We present here results for photoinduced absorption spectroscopy of the emeraldine base form of polyaniline. Unlike earlier studied polymers, the spectrum of emeraldine base contains both subgap photoinduced bleaching (at 1.8 eV) and photoinduced absorption (at 0.9, 1.4, and 3.0 eV). The existence of the bleaching peak is consistent with a model of optically excited localized molecular excitons in the emeraldine base polymer. The energies of the three photoinduced absorptions peaks and an associated interband bleaching (at energies greater than ∼3.5 eV) are in agreement with the photogeneration of polaron pairs. Laser intensity studies support that the excitons decay monomolecularly while the polarons decay bimolecularly. Picosecond time-resolved spectroscopy of the exciton decay demonstrates the rapid response of this system.

Optical absorption in PdH

1982 ◽  
Vol 43 (2) ◽  
pp. 323-328 ◽  
Author(s):  
M.A. Khan ◽  
R. Riedinger
Keyword(s):  
Optical Absorption

IRREVERSIBLE PHOTOINDUCED CHANGE IN THE OPTICAL ABSORPTION OF YIG(Si) ON IRRADIATION

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-794-C1-795
Author(s):  
J. F. DILLON ◽  
Jr ◽  
E. M. GYORGY ◽  
J. P. REMEIKA
Keyword(s):  
Optical Absorption ◽  
Photoinduced Change
Sign in / Sign up

Export Citation Format

Share Document