Publication result detail
A Molecular Photosensor Based on Photoswitching of Charge Carrier Mobility
WEITER, M.; VALA, M.; ZMEŠKAL, O.; NEŠPŮREK, S.; TOMAN, P.
Original Title
A Molecular Photosensor Based on Photoswitching of Charge Carrier Mobility
English Title
A Molecular Photosensor Based on Photoswitching of Charge Carrier Mobility
Type
Peer-reviewed article not indexed in WoS or Scopus
Original Abstract
Polymer photoelectronic device based on interaction between ?-conjugated polymer matrices and photochromic molecules was fabricated. The theoretical and experimental studies proved that the photochromic reaction in studied devices should eventuate in changes of optical and electrical properties of polymers such as luminescence and conductivity. The quantum chemical calculations showed that the presence of dipolar species in the vicinity of a polymer chain modifies the on-chain site energies and consequently increases the width of the distribution of hopping transport states. Optical switching was studied using standard absorption and photoluminescence spectroscopy. A strong photoluminescence quenching after the photochromic conversion caused by radiative energy transfer was observed. The influence of photoswitchable charge carrier traps on charge transport were evaluated by Space Charge Limited Current (SCLC) method. It was shown that deep traps may significantly affect the energy of the transport level, and thus modulate the transport of charge carriers.
English abstract
Polymer photoelectronic device based on interaction between ?-conjugated polymer matrices and photochromic molecules was fabricated. The theoretical and experimental studies proved that the photochromic reaction in studied devices should eventuate in changes of optical and electrical properties of polymers such as luminescence and conductivity. The quantum chemical calculations showed that the presence of dipolar species in the vicinity of a polymer chain modifies the on-chain site energies and consequently increases the width of the distribution of hopping transport states. Optical switching was studied using standard absorption and photoluminescence spectroscopy. A strong photoluminescence quenching after the photochromic conversion caused by radiative energy transfer was observed. The influence of photoswitchable charge carrier traps on charge transport were evaluated by Space Charge Limited Current (SCLC) method. It was shown that deep traps may significantly affect the energy of the transport level, and thus modulate the transport of charge carriers.
Keywords
charge transport, conjugated polymers, quantum chemistry
Key words in English
charge transport, conjugated polymers, quantum chemistry
Authors
WEITER, M.; VALA, M.; ZMEŠKAL, O.; NEŠPŮREK, S.; TOMAN, P.
Released
01.03.2007
ISBN
1022-1360
Periodical
MACROMOLECULAR SYMPOSIA
Volume
2007
Number
247
State
Federal Republic of Germany
Pages from
318
Pages to
325
Pages count
8
BibTex
@article{BUT45322,
author="Martin {Weiter} and Martin {Vala} and Oldřich {Zmeškal} and Stanislav {Nešpůrek} and Petr {Toman}",
title="A Molecular Photosensor Based on Photoswitching of Charge Carrier Mobility",
journal="MACROMOLECULAR SYMPOSIA",
year="2007",
volume="2007",
number="247",
pages="318--325",
issn="1022-1360"
}