Photoluminescence spectra of oligo-paraphenylenevinylenes: A joint theoretical and experimental characterization

J. Cornil; D. Beljonne; C. M. Heller; I. H. Campbell; B. K. Laurich; D. L. Smith; D. D.C. Bradley; K. Müllen; J. L. Brédas

doi:10.1016/S0009-2614(97)00986-X

Photoluminescence spectra of oligo-paraphenylenevinylenes: A joint theoretical and experimental characterization

J. Cornil^*, D. Beljonne, C. M. Heller, I. H. Campbell, B. K. Laurich, D. L. Smith, D. D.C. Bradley, K. Müllen, J. L. Brédas

^*Corresponding author for this work

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Abstract

We present a joint theoretical and experimental characterization of the absorption and photoluminescence spectra of oligo-paraphenylenevinylenes containing from 2 to 5 phenylene rings. Attention is paid to the emission spectra and their vibronic progressions in order to shed light on the geometry relaxation phenomena in the lowest singlet excited state. The results indicate that the relaxation energy in the excited state increases with inverse chain length. For long conjugated chains, the relaxation energy of the bound electron-hole pair is extrapolated to be of the order of 0.14 eV and the most significant part of the geometry deformations are found to spread over a length of about 20 Å.

Original language	English (US)
Pages (from-to)	139-145
Number of pages	7
Journal	Chemical Physics Letters
Volume	278
Issue number	1-3
DOIs	https://doi.org/10.1016/S0009-2614(97)00986-X
State	Published - Oct 24 1997
Externally published	Yes

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Generated from Scopus record by KAUST IRTS on 2019-11-27

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Photoluminescence spectra of oligo-paraphenylenevinylenes: A joint theoretical and experimental characterization",

abstract = "We present a joint theoretical and experimental characterization of the absorption and photoluminescence spectra of oligo-paraphenylenevinylenes containing from 2 to 5 phenylene rings. Attention is paid to the emission spectra and their vibronic progressions in order to shed light on the geometry relaxation phenomena in the lowest singlet excited state. The results indicate that the relaxation energy in the excited state increases with inverse chain length. For long conjugated chains, the relaxation energy of the bound electron-hole pair is extrapolated to be of the order of 0.14 eV and the most significant part of the geometry deformations are found to spread over a length of about 20 {\AA}.",

author = "J. Cornil and D. Beljonne and Heller, {C. M.} and Campbell, {I. H.} and Laurich, {B. K.} and Smith, {D. L.} and Bradley, {D. D.C.} and K. M{\"u}llen and Br{\'e}das, {J. L.}",

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year = "1997",

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doi = "10.1016/S0009-2614(97)00986-X",

language = "English (US)",

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T1 - Photoluminescence spectra of oligo-paraphenylenevinylenes

T2 - A joint theoretical and experimental characterization

AU - Cornil, J.

AU - Beljonne, D.

AU - Heller, C. M.

AU - Campbell, I. H.

AU - Laurich, B. K.

AU - Smith, D. L.

AU - Bradley, D. D.C.

AU - Müllen, K.

AU - Brédas, J. L.

N1 - Generated from Scopus record by KAUST IRTS on 2019-11-27

PY - 1997/10/24

Y1 - 1997/10/24

N2 - We present a joint theoretical and experimental characterization of the absorption and photoluminescence spectra of oligo-paraphenylenevinylenes containing from 2 to 5 phenylene rings. Attention is paid to the emission spectra and their vibronic progressions in order to shed light on the geometry relaxation phenomena in the lowest singlet excited state. The results indicate that the relaxation energy in the excited state increases with inverse chain length. For long conjugated chains, the relaxation energy of the bound electron-hole pair is extrapolated to be of the order of 0.14 eV and the most significant part of the geometry deformations are found to spread over a length of about 20 Å.

AB - We present a joint theoretical and experimental characterization of the absorption and photoluminescence spectra of oligo-paraphenylenevinylenes containing from 2 to 5 phenylene rings. Attention is paid to the emission spectra and their vibronic progressions in order to shed light on the geometry relaxation phenomena in the lowest singlet excited state. The results indicate that the relaxation energy in the excited state increases with inverse chain length. For long conjugated chains, the relaxation energy of the bound electron-hole pair is extrapolated to be of the order of 0.14 eV and the most significant part of the geometry deformations are found to spread over a length of about 20 Å.

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U2 - 10.1016/S0009-2614(97)00986-X

DO - 10.1016/S0009-2614(97)00986-X

M3 - Article

AN - SCOPUS:0031585447

SN - 0009-2614

VL - 278

SP - 139

EP - 145

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-3

ER -

Photoluminescence spectra of oligo-paraphenylenevinylenes: A joint theoretical and experimental characterization

Abstract

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