Publication detail

A Molecular Photosensor Based on Photoswitching of Charge Carrier Mobility

WEITER, M. VALA, M. ZMEŠKAL, O. NEŠPŮREK, S. TOMAN, P.

Original Title

Type

journal article - other

Language

English

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.

Keywords

charge transport, conjugated polymers, quantum chemistry

Authors

WEITER, M.; VALA, M.; ZMEŠKAL, O.; NEŠPŮREK, S.; TOMAN, P.

RIV year

2007

Released

1. 3. 2007

ISBN

1022-1360

Periodical

MACROMOLECULAR SYMPOSIA

Year of study

2007

Number

247

State

Federal Republic of Germany

Pages from

318

Pages to

325

Pages count

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"
}