Electromodulated photoinduced absorption : A new spectroscopy in π- conjugated polymer/C60 blends

Liess, Martin; Lane, Paul A.; Kafafi, Zakya H.; Hamaguchi, M.; Ozaki, Masanori; Yoshino, Katsumi; Vardeny, Z. Valy

doi:https://doi.org/10.1117/12.293356

Electromodulated photoinduced absorption : A new spectroscopy in π- conjugated polymer/C60 blends

Liess, Martin; Lane, Paul A.; Kafafi, Zakya H. et al.

Proceedings of SPIE - The International Society for Optical Engineering, 1997, 3142, 150-160

アクセス数:516件（2025-07-13 22:43 集計）

固定URL: https://hdl.handle.net/11094/76956

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タイトル	Electromodulated photoinduced absorption : A new spectroscopy in π- conjugated polymer/C60 blends
著者	著者名 Liess, Martin
	著者名 Lane, Paul A.
	著者名 Kafafi, Zakya H.
	著者名 Hamaguchi, M.
	NRID 1000050204186 1000050204186 ORCID 0000-0002-9556-4225 0000-0002-9556-4225 researchmap permalink read0014092 read0014092 Scopus Author ID 55490143900 55490143900 著者名 Ozaki, Masanori
	NRID 1000070029205 1000070029205 著者名 Yoshino, Katsumi
	著者名 Vardeny, Z. Valy
キーワード等	Electromodulated photoinduced absorption (EPA)
	C60 doping
	Luminescence
	Electromodulated photoluminescence (EPL)
	Polaron pair polarizability
内容	Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States
内容	Martin Liess, Paul A. Lane, Zakya H. Kafafi, M. Hamaguchi, Masanori Ozaki, Katsumi Yoshino, and Z. Valy Vardeny "Electromodulated photoinduced absorption: a new spectroscopy in π-conjugated polymer/C60 blends", Proc. SPIE 3142, Fullerenes and Photonics IV, (1 November 1997). DOI: https://doi.org/10.1117/12.293356
抄録	We have applied the electromodulated photoinduced absorption (EPA) technique to a variety of C60-doped and pristine luminescent conducting polymer films. EPA measures the electric field-related change of the absorption in the sample as a result of above-gap illumination. An electric field leads to two major effects. One is a possible Stark shift of photoexcitation energy levels, and the other is a change in the photoexcitation decay kinetics, which leads to reduction or enhancement of PA features. This can be due to an electric field enhanced dissociation of the 1Bu exciton or due to a lifetime reduction of polaron pairs. The EPA technique helps to elucidate the photoinduced absorption bands of the charge transfer complex C60- P+, where P+ is a positively charged polaron on the polymer chain. The following thin films were studied by EPA: MEH-PPV/C60, pristine MEH-PPV, PPP/C60, P3OT/C60, PTSi/C60, and pristine PTSi. We found for the two PA bands of polarons that E(LE) + E(HE) equals Eg. We also found that the polarizability of polaron pairs in three orders of magnitude bigger that the polarizability of the 1Bu exciton.
出版者	SPIE
収録物名	Proceedings of SPIE - The International Society for Optical Engineering
巻(号)	3142
ページ	150-160
刊行年月	1997-11-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/76956
PISSN	0277786X
NCID	AA10619755
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1117/12.293356
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	会議発表論文 Conference Paper

資源タイプ	会議発表論文
ローカル資源タイプ	会議発表論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Proceedings of SPIE - The International Society for Optical Engineering. 1997, 3142, p. 150-160
DC.title	Electromodulated photoinduced absorption : A new spectroscopy in π- conjugated polymer/C60 blends
DC.creator	Liess, Martin
	Lane, Paul A.
	Kafafi, Zakya H.
	Hamaguchi, M.
	Ozaki, Masanori
	Yoshino, Katsumi
	Vardeny, Z. Valy
DC.publisher	SPIE
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	1997-11-01
DC.identifier	https://doi.org/10.1117/12.293356
DC.subject	Electromodulated photoinduced absorption (EPA)
	C60 doping
	Luminescence
	Electromodulated photoluminescence (EPL)
	Polaron pair polarizability
DC.description	Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States
DC.description	Martin Liess, Paul A. Lane, Zakya H. Kafafi, M. Hamaguchi, Masanori Ozaki, Katsumi Yoshino, and Z. Valy Vardeny "Electromodulated photoinduced absorption: a new spectroscopy in π-conjugated polymer/C60 blends", Proc. SPIE 3142, Fullerenes and Photonics IV, (1 November 1997). DOI: https://doi.org/10.1117/12.293356
DCTERMS.abstract	We have applied the electromodulated photoinduced absorption (EPA) technique to a variety of C60-doped and pristine luminescent conducting polymer films. EPA measures the electric field-related change of the absorption in the sample as a result of above-gap illumination. An electric field leads to two major effects. One is a possible Stark shift of photoexcitation energy levels, and the other is a change in the photoexcitation decay kinetics, which leads to reduction or enhancement of PA features. This can be due to an electric field enhanced dissociation of the 1Bu exciton or due to a lifetime reduction of polaron pairs. The EPA technique helps to elucidate the photoinduced absorption bands of the charge transfer complex C60- P+, where P+ is a positively charged polaron on the polymer chain. The following thin films were studied by EPA: MEH-PPV/C60, pristine MEH-PPV, PPP/C60, P3OT/C60, PTSi/C60, and pristine PTSi. We found for the two PA bands of polarons that E(LE) + E(HE) equals Eg. We also found that the polarizability of polaron pairs in three orders of magnitude bigger that the polarizability of the 1Bu exciton.
DC.format	76956
citation_title	Electromodulated photoinduced absorption : A new spectroscopy in π- conjugated polymer/C60 blends
citation_author	Liess, Martin
	Lane, Paul A.
	Kafafi, Zakya H.
	Hamaguchi, M.
	Ozaki, Masanori
	Yoshino, Katsumi
	Vardeny, Z. Valy
citation_publisher	SPIE
citation_language	英語
citation_date	1997-11-01
citation_journal_title	Proceedings of SPIE - The International Society for Optical Engineering
citation_volume	3142
citation_firstpage	150
citation_lastpage	160
citation_doi	https://doi.org/10.1117/12.293356
citation_public_url	https://hdl.handle.net/11094/76956

Electromodulated photoinduced absorption : A new spectroscopy in π- conjugated polymer/C60 blends

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