Title Synthesis and properties of organic light-emitting compounds based on benzanthrone and pyrimidine-5-carbonitrile moieties /
Translation of Title Benzantrono ir pirimidino-5-karbonitrilo darinių kaip organinių spinduolių sintezė ir savybės.
Authors Tsiko, Uliana
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Pages 120
Keywords [eng] benzanthrone ; pyrimidine-5-carbonitrile ; organic light-emitting diodes ; oxygen sensors
Abstract [eng] The evolution of organic light-emitting compounds is a prerequisite for the development of highly efficient organic luminescent devices. To obtain the emitters with the special properties the careful selection of donor and acceptor units has to be done. The thesis is devoted to the synthesis and investigation of properties of new light-emitting donor-acceptor derivatives containing benzanthrone or pyrimidine-5-carbonitrile moieties for the application in organic light-emitting diodes (OLEDs) and oxygen sensors. The effect of donor strength on photophysical, electrochemical and thermal properties of the synthesized materials was investigated. Carbozole- and benzantrone-based materials exhebited mechanochromic luminiscence. Phenothiazinyl or phenoxazinyl-substituted benzanthrones were characterized as promosing candidates for oxygen sensing. New emitters containing pyrimidine-5-carbonitrile moiety as acceptor and carbazolyl and tret-butyl carbazolyl groups as donors were developed. They exhibited thermally activated delayed fluorescence Their applicability for the fabrication of efficient sky-blue OLEDs and oxygen sensors was demonstrated. Triphenylamino or 9-phenyl carbazolyl substituted pyrimidine-5-carbonitriles were synthesized for the first time and utilized as emitters for blue and green fluorescent OLEDs and as hosts for efficient orange-red OLEDs based on thermally activated delayed fluorescence. External quantum efficiency of the devices exceeded of 20%.
Dissertation Institution Kauno technologijos universitetas.
Type Doctoral thesis
Language English
Publication date 2022