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

Number of Access:535（2025-09-02 10:24 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/76956

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Title	Electromodulated photoinduced absorption : A new spectroscopy in π- conjugated polymer/C60 blends
Creator	CreatorName Liess, Martin
	CreatorName Lane, Paul A.
	CreatorName Kafafi, Zakya H.
	CreatorName Hamaguchi, M.
	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
	CreatorName Vardeny, Z. Valy
Subject	Electromodulated photoinduced absorption (EPA)
	C60 doping
	Luminescence
	Electromodulated photoluminescence (EPL)
	Polaron pair polarizability
Description	Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States
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
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.
Publisher	SPIE
Source Title	Proceedings of SPIE - The International Society for Optical Engineering
Volume (Issue)	3142
Page	150-160
Date of Issued	1997-11-01
Language	English
Handle URL	https://hdl.handle.net/11094/76956
PISSN	0277786X
NCID	AA10619755
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1117/12.293356
Access Rights	open access
oaire:version	Version of Record
Category	会議発表論文 Conference Paper

Resource Type	conference paper
Local Type	Conference Paper
DCMI Type	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	English
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	English
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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