Author, Institution: Raminta Beresnevičiūtė, Kaunas University of Technology
Science area, field of science: Natural Sciences, Chemistry, N003
Research supervisor: Prof. Dr. Saulius Grigalevičius (Kaunas University of Technology, Natural Sciences, Chemistry, N003)
Research consultant: Assoc. Prof. Dr. Daiva Tavgenienė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T 008)
Dissertation Defence Board of Chemistry Science Field:
Prof. Dr. Vytautas Getautis (Kaunas University of Technology, Natural Sciences, Chemistry, N003) – chairperson
Senior Researcher Dr. Viktorija Andrulevičienė (Kaunas University of Technology, Natural Sciences, Chemistry, N003)
Senior Researcher Dr. Marytė Daškevičienė (Kaunas University of Technology, Natural Sciences, Chemistry, N003)
Chief Researcher Dr. Karolis Kazlauskas (Vilnius University, Natural Sciences, Physics, N002)
Assoc. Prof. Dr. Jolanta Rousseau (Artois University, France, Natural sciences, Chemistry, N003)
Dissertation defence meeting will be at Rectorate Hall of Kaunas University of Technology (K. Donelaičio 73-402, Kaunas)
The doctoral dissertation is available at the library of Kaunas University of Technology (Gedimino 50, Kaunas) and on the internet: R. Beresnevičiūtė el. dissertation.pdf
© R. Beresnevičiūtė, 2025 “The text of the thesis may not be copied, distributed, published, made public, including by making it publicly available on computer networks (Internet), reproduced in any form or by any means, including, but not limited to, electronic, mechanical or other means. Pursuant to Article 25(1) of the Law on Copyright and Related Rights of the Republic of Lithuania, a person with a disability who has difficulties in reading a document of a thesis published on the Internet, and insofar as this is justified by a particular disability, shall request that the document be made available in an alternative form by e-mail to doktorantura@ktu.lt.”
Annotation: Over the past two decades, organic light-emitting diode (OLED) technology has significantly revolutionized display development and has become one of the dominant technologies in smartphones, flat-screen televisions, and lighting applications. To create efficient and durable organic light-emitting diodes, new electroactive compounds were synthesized. Carbazole and its various derivatives are among the most extensively studied and applied organic semiconductors in OLEDs because of their relatively simple modification and broad versatility. This study investigates four groups of carbazole-based derivatives designed for OLED fabrication. The compounds were synthesized, their thermal, photophysical, and electrochemical properties were analyzed, and then the materials were applied in OLED prototypes. Materials containing naphthalimide acceptor fragments were tested as emitters in the emissive layers. Other bipolar derivatives with carbazole fragments as donors and pyridine fragments as acceptors were used as hosts in emissive layers. The new emissive layers were found to enhance device efficiency. In addition, the versatility and efficiency of compounds containing methoxydibenzofuran-carbazole donor groups were demonstrated. The materials function in two areas of application as blue fluorescent emitters as well as hosts in phosphorescent OLED prototypes.