Excited energy states in poly(p-phenylenevinylene)

J. M. Leng, D. Dick, X. Wei, Z. V. Vardeny, Fangyeong Guo, S. Mazumdar

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have studied electronic excited states in films of poly (p-phenylene vinylene) using picosecond transient and steady state (cw) photoinduced absorption (PA) and photoluminescence (PL) as well as their excitation spectra (ES). The ps transient PA spectrum consists of two PA bands both with the same transient dynamics, one band peaks at ˜0.5 eV and the other peaks at 1.7 eV; neither of them can be related to the cw PA bands. Since the transient PL decay is correlated with the transient decay of both PA bands up to 200 ps, we conclude that the photoexcitations for t < 200 ps are radiative singlet excitons; they relax in about 200 ps and the radiative quantum efficiency substantially decreases thereafter. From the ES spectra of the cw PA band ES we tentatively assign the important excited electronic states in PPV such as the mAg exciton and the continuum band.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalMolecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Volume256
Issue number1
DOIs
Publication statusPublished - 1994 Jan 1

Fingerprint

Electron energy levels
Absorption spectra
absorption spectra
Excitons
excitation
Photoluminescence
excitons
energy
photoluminescence
Photoexcitation
Electronic states
decay
Quantum efficiency
photoexcitation
electronics
Excited states
quantum efficiency
poly(4-phenylenevinylene)
continuums
LDS 751

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

@article{6e869ad0261c48b7a434e32023d74a46,
title = "Excited energy states in poly(p-phenylenevinylene)",
abstract = "We have studied electronic excited states in films of poly (p-phenylene vinylene) using picosecond transient and steady state (cw) photoinduced absorption (PA) and photoluminescence (PL) as well as their excitation spectra (ES). The ps transient PA spectrum consists of two PA bands both with the same transient dynamics, one band peaks at ˜0.5 eV and the other peaks at 1.7 eV; neither of them can be related to the cw PA bands. Since the transient PL decay is correlated with the transient decay of both PA bands up to 200 ps, we conclude that the photoexcitations for t < 200 ps are radiative singlet excitons; they relax in about 200 ps and the radiative quantum efficiency substantially decreases thereafter. From the ES spectra of the cw PA band ES we tentatively assign the important excited electronic states in PPV such as the mAg exciton and the continuum band.",
author = "Leng, {J. M.} and D. Dick and X. Wei and Vardeny, {Z. V.} and Fangyeong Guo and S. Mazumdar",
year = "1994",
month = "1",
day = "1",
doi = "10.1080/10587259408039225",
language = "English",
volume = "256",
pages = "1--8",
journal = "Molecular Crystals and Liquid Crystals",
issn = "1542-1406",
publisher = "Taylor and Francis Ltd.",
number = "1",

}

Excited energy states in poly(p-phenylenevinylene). / Leng, J. M.; Dick, D.; Wei, X.; Vardeny, Z. V.; Guo, Fangyeong; Mazumdar, S.

In: Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol. 256, No. 1, 01.01.1994, p. 1-8.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Excited energy states in poly(p-phenylenevinylene)

AU - Leng, J. M.

AU - Dick, D.

AU - Wei, X.

AU - Vardeny, Z. V.

AU - Guo, Fangyeong

AU - Mazumdar, S.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - We have studied electronic excited states in films of poly (p-phenylene vinylene) using picosecond transient and steady state (cw) photoinduced absorption (PA) and photoluminescence (PL) as well as their excitation spectra (ES). The ps transient PA spectrum consists of two PA bands both with the same transient dynamics, one band peaks at ˜0.5 eV and the other peaks at 1.7 eV; neither of them can be related to the cw PA bands. Since the transient PL decay is correlated with the transient decay of both PA bands up to 200 ps, we conclude that the photoexcitations for t < 200 ps are radiative singlet excitons; they relax in about 200 ps and the radiative quantum efficiency substantially decreases thereafter. From the ES spectra of the cw PA band ES we tentatively assign the important excited electronic states in PPV such as the mAg exciton and the continuum band.

AB - We have studied electronic excited states in films of poly (p-phenylene vinylene) using picosecond transient and steady state (cw) photoinduced absorption (PA) and photoluminescence (PL) as well as their excitation spectra (ES). The ps transient PA spectrum consists of two PA bands both with the same transient dynamics, one band peaks at ˜0.5 eV and the other peaks at 1.7 eV; neither of them can be related to the cw PA bands. Since the transient PL decay is correlated with the transient decay of both PA bands up to 200 ps, we conclude that the photoexcitations for t < 200 ps are radiative singlet excitons; they relax in about 200 ps and the radiative quantum efficiency substantially decreases thereafter. From the ES spectra of the cw PA band ES we tentatively assign the important excited electronic states in PPV such as the mAg exciton and the continuum band.

UR - http://www.scopus.com/inward/record.url?scp=84972959792&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84972959792&partnerID=8YFLogxK

U2 - 10.1080/10587259408039225

DO - 10.1080/10587259408039225

M3 - Article

AN - SCOPUS:84972959792

VL - 256

SP - 1

EP - 8

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

SN - 1542-1406

IS - 1

ER -