Publication detail

New organic materials with high solid state fluorescence

KOUTNÝ, J. VALA, M. LUŇÁK, S. PAUK, K. IMRAMOVSKÝ, A. WEITER, M.

Original Title

New organic materials with high solid state fluorescence

Type

abstract

Language

English

Original Abstract

In the recent years research of relationship between photoluminescence emission in a solid state and chemical structure has received considerable attention. New materials with strong emission in a solid state are being studied intensively, particularly because of their potential multiple applications, such as organic light-emitting diodes, organic light emitting thin-film transistors and organic solid state lasers. Obtaining these materials is very problematic. Nowadays we know many types of conjugated molecules with strong emission in solution but only a few in the solid state. This is caused by molecular aggregation in the solid state because intermolecular interaction between the excited molecules and the adjacent molecules arises in aggregation material, e.g. transfer of energy and electrons, formation of excimers etc. This interaction leads to new quenching channels that reduce fluorescence emission. Most of these interactions depend on the distance between the molecules and their mutual position. Relatively small variation of the chemical structure brings significantly different molecule geometry in the solid state and thus diverse optical properties. The contribution is focused on the influence of the chemical structure modification e.g. by various strength of the donor and acceptor groups on the optical properties and mainly on the fluorescence in solid state. The influence was investigated with the help of various donor-π-conjugated bridge-acceptor molecules where the bridge represents framework with bulky substituents oriented perpendicular to π-conjugated plane. Optical properties such as absorption, fluorescence, fluorescence quantum yield (PLQY) and lifetime in the solid state were studied and discussed.

Keywords

solid state photoluminescence, molecular aggregation

Authors

KOUTNÝ, J.; VALA, M.; LUŇÁK, S.; PAUK, K.; IMRAMOVSKÝ, A.; WEITER, M.

Released

25. 9. 2015

Location

Moskva

ISBN

neuvedeno

Book

2nd International Fall School of Organic Electronics Book of abstracts

Pages from

81

Pages to

81

Pages count

1

BibTex

@misc{BUT117077,
  author="Jan {Koutný} and Martin {Vala} and Stanislav {Luňák} and Karel {Pauk} and Aleš {Imramovský} and Martin {Weiter}",
  title="New organic materials with high solid state fluorescence",
  booktitle="2nd International Fall School of Organic Electronics Book of abstracts",
  year="2015",
  pages="81--81",
  address="Moskva",
  isbn="neuvedeno",
  note="abstract"
}