Model of transient photoinduced absorption with an exciton polaron in conjugated polymers

1998 ◽  
Vol 57 (11) ◽  
pp. 6386-6390 ◽  
Author(s):  
V. A. Shakin ◽  
S. Abe ◽  
Y. Shimoi
Keyword(s):  
Conjugated Polymers ◽  
Photoinduced Absorption

Nonlinear Optical Properties of Two Thiophene-Based Polyconjugated Systems: Photoinduced Absorption and Third Harmonic Generation Spectroscopy

1989 ◽  
Vol 173 ◽  
Author(s):  
R. Zamboni ◽  
C. Taliani ◽  
G. Ruani ◽  
A. J. Pal ◽  
F. Kajzar
Keyword(s):  
Optical Properties ◽  
Conjugated Polymers ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Third Harmonic Generation ◽  
Nonlinear Optical Properties ◽  
Photoinduced Absorption ◽  
Third Harmonic ◽  
Optical Gap ◽  
The Third

ABSTRACTNonlinear optical properties of two thiophene-based conjugated polymers (PTT and PDTB) were studied by the photoinduced absorption spectroscopy and the third harmonic generation spectroscopy. The results obtained with these two methods are used to estimate the value of χ(3) in these materials. Resonant χ(3) are (2.0 ± 0.2) × 10−11 e.s.u. and (1.0 ± 0.1) × 10−11 e.s.u. for PTT and PDTB, respectively. χ(3) is shown to be related to the width of the optical gap through a sixth-power law. In PTT a vibronic structure due to the C = C stretching mode appears in the χ(3) spectrum.

Even Parity States in Ppv, Polythiophene and Polysilanes

1993 ◽  
Vol 328 ◽  
Author(s):  
F. Guo ◽  
M. Chandross ◽  
S. Mazumdar
Keyword(s):  
Conjugated Polymers ◽  
Parity State ◽  
Photoinduced Absorption ◽  
Absorption Data ◽  
Two Photon ◽  
Bond Alternation ◽  
Theoretical Evidence ◽  
Long Chains

ABSTRACTTwo photon absorptions (TPA) in conjugated polymers with large bond alternation are reinterpreted. TPA to the 2Ag in long chains should be tiny due to cancellation effects, and therefore the observed strong, narrow TPA is to a higher even parity state. We also present the first theoretical evidence for bound biexcitons, and explain recent photoinduced absorption data.

Photoinduced absorption in a series of thiophene based conjugated polymers

1991 ◽  
Vol 41 (1-2) ◽  
pp. 579-582 ◽  
Author(s):  
A.J. Pal ◽  
G. Ruani ◽  
R. Zamboni ◽  
R. Danieli ◽  
C. Taliani
Keyword(s):  
Conjugated Polymers ◽  
Photoinduced Absorption

Photoinduced absorption of π-conjugated polymers in solution

1995 ◽  
Vol 69 (1-3) ◽  
pp. 441-442 ◽  
Author(s):  
R.A.J. Janssen ◽  
N.S. Sariciftci ◽  
K. Pakbaz ◽  
J.J. McNamara ◽  
S. Schricker ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Photoinduced Absorption
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