Excited state spectral and dynamics studies of MEH-PPV

A. Dogariu; D. Vacar; A. J. Heeger

doi:10.1016/S0379-6779(98)01255-7

Excited state spectral and dynamics studies of MEH-PPV

A. Dogariu
, D. Vacar
, A. J. Heeger

Research output: Contribution to journal › Conference article › peer-review

3 Scopus citations

Abstract

Femtosecond spectroscopy studies of several thin conjugated polymer films and solutions were performed in order to examine the gain/loss in the excited state. The excited state shows bimolecular interaction at distances higher than 10 nm between excitations. The ultrafast dynamics are consistent with bimolecular dipole-dipole interaction, but a quantum delocalization of at least 5 nm has to be assumed. We show how the photoinduced absorption affects the emission of light in long as opposed to short (thin film) optical path configurations: the photoluminescence from thick sample spectrally overlaps the net gain (stimulated emission minus photoinduced absorption). The results show that the observed spectral narrowing occurs through amplified spontaneous emission.

Original language	English (US)
Pages (from-to)	202-203
Number of pages	2
Journal	Synthetic Metals
Volume	101
Issue number	1
DOIs	https://doi.org/10.1016/S0379-6779(98)01255-7
State	Published - May 1999
Externally published	Yes
Event	Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier Duration: Jul 12 1998 → Jul 18 1998

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0379-6779(98)01255-7

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title = "Excited state spectral and dynamics studies of MEH-PPV",

abstract = "Femtosecond spectroscopy studies of several thin conjugated polymer films and solutions were performed in order to examine the gain/loss in the excited state. The excited state shows bimolecular interaction at distances higher than 10 nm between excitations. The ultrafast dynamics are consistent with bimolecular dipole-dipole interaction, but a quantum delocalization of at least 5 nm has to be assumed. We show how the photoinduced absorption affects the emission of light in long as opposed to short (thin film) optical path configurations: the photoluminescence from thick sample spectrally overlaps the net gain (stimulated emission minus photoinduced absorption). The results show that the observed spectral narrowing occurs through amplified spontaneous emission.",

author = "A. Dogariu and D. Vacar and Heeger, \{A. J.\}",

year = "1999",

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doi = "10.1016/S0379-6779(98)01255-7",

language = "English (US)",

volume = "101",

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journal = "Synthetic Metals",

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publisher = "Elsevier B.V.",

number = "1",

note = "Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) ; Conference date: 12-07-1998 Through 18-07-1998",

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TY - JOUR

T1 - Excited state spectral and dynamics studies of MEH-PPV

AU - Dogariu, A.

AU - Vacar, D.

AU - Heeger, A. J.

PY - 1999/5

Y1 - 1999/5

N2 - Femtosecond spectroscopy studies of several thin conjugated polymer films and solutions were performed in order to examine the gain/loss in the excited state. The excited state shows bimolecular interaction at distances higher than 10 nm between excitations. The ultrafast dynamics are consistent with bimolecular dipole-dipole interaction, but a quantum delocalization of at least 5 nm has to be assumed. We show how the photoinduced absorption affects the emission of light in long as opposed to short (thin film) optical path configurations: the photoluminescence from thick sample spectrally overlaps the net gain (stimulated emission minus photoinduced absorption). The results show that the observed spectral narrowing occurs through amplified spontaneous emission.

AB - Femtosecond spectroscopy studies of several thin conjugated polymer films and solutions were performed in order to examine the gain/loss in the excited state. The excited state shows bimolecular interaction at distances higher than 10 nm between excitations. The ultrafast dynamics are consistent with bimolecular dipole-dipole interaction, but a quantum delocalization of at least 5 nm has to be assumed. We show how the photoinduced absorption affects the emission of light in long as opposed to short (thin film) optical path configurations: the photoluminescence from thick sample spectrally overlaps the net gain (stimulated emission minus photoinduced absorption). The results show that the observed spectral narrowing occurs through amplified spontaneous emission.

UR - https://www.scopus.com/pages/publications/0032597407

UR - https://www.scopus.com/pages/publications/0032597407#tab=citedBy

U2 - 10.1016/S0379-6779(98)01255-7

DO - 10.1016/S0379-6779(98)01255-7

M3 - Conference article

AN - SCOPUS:0032597407

SN - 0379-6779

VL - 101

SP - 202

EP - 203

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1

T2 - Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98)

Y2 - 12 July 1998 through 18 July 1998

ER -

Excited state spectral and dynamics studies of MEH-PPV

Abstract

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