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

Frankevich, Eugene; Nishihara, Yusuke; Fujii, Akihiko; Ozaki, Masanori; Yoshino, Katsumi

doi:info:doi/10.1103/PhysRevB.66.155203

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タイトル	Time-resolved study of polaron pairs in conjugated polymers by two-correlated-pulses technique
著者	Frankevich, Eugene Frankevich, Eugene
	Nishihara, Yusuke Nishihara, Yusuke
	Fujii, Akihiko Fujii, Akihiko
	Ozaki, Masanori Ozaki, Masanori
	Yoshino, Katsumi Yoshino, Katsumi
抄録	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.
公開者	American Physical Society
掲載誌名	Physical Review B
巻	66
号	15
開始ページ	155203
終了ページ	155203
刊行年月	2002-10-04
ISSN	24699950
ISSN	24699969
NCID	AA11187113
DOI (出版社版)	info:doi/10.1103/PhysRevB.66.155203
URL	http://hdl.handle.net/11094/75675
権利情報	Copyright (2002) by the American Physical Society
言語	英語
カテゴリ	学術雑誌論文 Journal Article

著者版フラグ	publisher
NII資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	Journal of Applied Physics.88(12) P.7120-P.7120
DC.title	Time-resolved study of polaron pairs in conjugated polymers by two-correlated-pulses technique
DC.creator	Frankevich, Eugene
	Nishihara, Yusuke
	Fujii, Akihiko
	Ozaki, Masanori
	Yoshino, Katsumi
DC.publisher	American Physical Society
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2002-10-04
DC.identifier	info:doi/10.1103/PhysRevB.66.155203
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/75675
DCTERMS.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.
DC.rights	Copyright (2002) by the American Physical Society
citation_title	Time-resolved study of polaron pairs in conjugated polymers by two-correlated-pulses technique
citation_author	Frankevich, Eugene
	Nishihara, Yusuke
	Fujii, Akihiko
	Ozaki, Masanori
	Yoshino, Katsumi
citation_publisher	American Physical Society
citation_language	英語
citation_date	2002-10-04
citation_journal_title	Physical Review B
citation_volume	66
citation_issue	15
citation_firstpage	155203
citation_lastpage	155203
citation_issn	24699950
citation_issn	24699969
citation_doi	info:doi/10.1103/PhysRevB.66.155203
citation_public_url	http://hdl.handle.net/11094/75675

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