<div class="csl-bib-body">
<div class="csl-entry">Poremba, N. (2019). <i>Azaindolo[3,2,1-jk]carbazole based donor-acceptor materials as potential TADF emitters</i> [Diploma Thesis, Technische Universität Wien]. reposiTUm. https://doi.org/10.34726/hss.2019.65225</div>
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dc.identifier.uri
https://doi.org/10.34726/hss.2019.65225
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/8482
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dc.description.abstract
Throughout the last decades, the field of organic optoelectronics gained constantly more importance in our everyday world and thereby research and development in this sector exhibits a need to improve these materials. Organic Light Emitting Diodes (OLEDs) are already in use for many electronical applications, including commercial TV screens and smartphones of everyday usage. Their biggest advantage lies in the fact, that organic semiconductors are soft materials. This results in flexible, thin and lightweight devices, which show good luminous efficacies, small contrast rates, as well as low production costs and no toxic containments. These properties arise also big interest in the use as lighting sources. Towards this development, different strategies of OLED designs can be achieved, including many factors, that need improvement. Latest research in our group introduced novel bipolar host materials for Phosphorescent Organic Light Emitting Diodes (PhOLEDs), based on oxadiazole electron acceptors and planarized triarylamines as donors. It was observed, that an increase of triarylamine planarization, leads to a decrease of the donor strength in the molecule as a consequence. Furthermore, fully planarized indolo[3,2,1 jk]carbazole (ICz) even showed weak acceptor character. The introduction of electron withdrawing nitrogen atoms in the ICz scaffold induced an increase of acceptor strength. In addition to the lowered HOMO and LUMO levels, high triplet energies were preserved. The aim of this work is the synthesis of novel donor-acceptor systems as potential Thermally Activated Delayed Fluorescence (TADF) emitters. Theoretical calculations for several bipolar systems using N-incorporated ICz acceptors with different nitrogen amounts and varying its position showed promising electro-luminescent properties, such as small singlet-triplet-energy gaps (ST < 0.2 eV), as well as a broad spectral range to cover. Hence, not only the amount, but also the position of the additional nitrogen in the structure has influence on the HOMO/LUMO levels, a comparison of acceptors with alternating strength in the final materials is also possible. Potential bipolar TADF-emitters In the course of this thesis a comprehensive synthetic approach towards the bipolar materials, including the required building blocks, was established. Furthermore, electrochemical and photophysical properties of the target materials were studied in detail.
en
dc.language
English
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dc.language.iso
en
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
Organic electronics
en
dc.subject
TADF emitter
en
dc.subject
Indolocarbazole
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dc.title
Azaindolo[3,2,1-jk]carbazole based donor-acceptor materials as potential TADF emitters
en
dc.type
Thesis
en
dc.type
Hochschulschrift
de
dc.rights.license
In Copyright
en
dc.rights.license
Urheberrechtsschutz
de
dc.identifier.doi
10.34726/hss.2019.65225
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dc.contributor.affiliation
TU Wien, Österreich
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dc.rights.holder
Nikolaus Poremba
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dc.publisher.place
Wien
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tuw.version
vor
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tuw.thesisinformation
Technische Universität Wien
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dc.contributor.assistant
Horkel, Ernst
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tuw.publication.orgunit
E163 - Institut für Angewandte Synthesechemie
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dc.type.qualificationlevel
Diploma
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dc.identifier.libraryid
AC15355903
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dc.description.numberOfPages
96
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dc.identifier.urn
urn:nbn:at:at-ubtuw:1-124225
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dc.thesistype
Diplomarbeit
de
dc.thesistype
Diploma Thesis
en
dc.rights.identifier
In Copyright
en
dc.rights.identifier
Urheberrechtsschutz
de
tuw.advisor.staffStatus
staff
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tuw.assistant.staffStatus
staff
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item.mimetype
application/pdf
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item.cerifentitytype
Publications
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item.openairetype
master thesis
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item.languageiso639-1
en
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item.fulltext
with Fulltext
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item.openaccessfulltext
Open Access
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item.grantfulltext
open
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item.openairecristype
http://purl.org/coar/resource_type/c_bdcc
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crisitem.author.dept
E163-03-2 - Forschungsgruppe Molekulare Chemie und Chemische Biologie
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crisitem.author.parentorg
E163-03 - Forschungsbereich Organische und Biologische Chemie