Time-resolved study of polaron pairs in conjugated polymers by two-correlated-pulses technique

Frankevich, Eugene; Nishihara, Yusuke; Fujii, Akihiko et al.

Physical Review B, 2002, 66(15), 155203-155203

Number of Access:305（2025-09-02 10:19 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/75675

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Title
Time-resolved study of polaron pairs in conjugated polymers by two-correlated-pulses technique
Creator
CreatorName
Frankevich, Eugene
CreatorName
Nishihara, Yusuke
NRID
1000080304020 1000080304020
ORCID
0000-0003-3142-1193 0000-0003-3142-1193
researchmap permalink
read0054804 read0054804
Scopus Author ID
35413649300 35413649300
CreatorName
Fujii, Akihiko
NRID
1000050204186 1000050204186
ORCID
0000-0002-9556-4225 0000-0002-9556-4225
researchmap permalink
read0014092 read0014092
Scopus Author ID
55490143900 55490143900
CreatorName
Ozaki, Masanori
NRID
1000070029205 1000070029205
CreatorName
Yoshino, Katsumi
Abstract
Formation of polaron pairs is studied in photoconducting conjugated polymers such as substituted polythiophenes.The polaron pairs show themselves in the second order processes that were the main supplier of free charge carrier at high excitation density provided by femtosecond laser pulses. Two-correlated-pulses technique are used, and permitted to resolve kinetics of the free charge carrier formation within the picosecond time domain. The external electrical field is shown to change a relative amount of free charge carriers formed in the first and second order processes ~i.e., by dissociation of primarily formed polaron pairs and by dissociation of the pairs formed as a result of recombination of primary pairs!. A method of estimation of intercharge distances in the pairs based on the action of the electrical field is suggested and shows that polaron pairs of two intercharge distances ~about 4 and 10 nm! are formed at the photoexcitation of polythiophenes studied.
Publisher
American Physical Society
Source Title
Physical Review B
Volume (Issue)
66(15)
Page
155203-155203
Date of Issued
2002-10-04
Language
English
Handle URL
https://hdl.handle.net/11094/75675
PISSN
24699950
eISSN
24699969
NCID
AA11187113
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1103/PhysRevB.66.155203
Access Rights
open access
CopyRight
Copyright (2002) by the American Physical Society
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article