Author, Institution: Mariia Stanitska, Kaunas University of Technology
Science area, field of science: Technological Sciences, Materials Engineering, T008
Research supervisor: Prof. Dr. Hab. Juozas Vidas Gražulevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Research consultant: Assoc. Prof. Dr. Rasa Keruckienė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Dissertation Defence Board of Materials Engineering Science Field:
Prof. Dr. Hab. Sigitas Tamulevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008) – chairperson
Prof. Dr. Saulius Grigalevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Dr. Lethy Krishnan Jagadamma (University of St Andrews, United Kingdom, Natural Sciences, Physics, N 002)
Prof. Dr. Hab. Roman Lesyk (Danylo Halytsky Lviv National Medical University, Ukraine, Natural sciences, Chemistry, N 003)
Chief Researcher Dr. Šarūnas Meškinis (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
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: M. Stanitska el. dissertation (PDF)
Annotation: Organic semiconductors are promising alternatives their inorganic counterparts. They are mainly utilized in organic light-emitting diodes (OLEDs) for display and lightning applications. In recent years, extensive research has been done to uncover the organic moieties and the linking pattern between them in order to attain good performance in optoelectroic devices devices. This study provides extensive insights into the design of luminescent 1H-1,2,3-triazole-based organic semiconductors for application in organic optoelectronics. The conditions of triazole ring formation are optimized to afford triazole derivatives in high yields and without extensive purification procedures. Exciplex-forming properties of triazole derivatives were studied for the first time, and for the first time, pure organic triazole-based compounds were utilized for the generation of white electroluminescence. The influence of various substituents attached to 1H-1,2,3-triazole ring on the thermal, electrochemical, and photophysical properties of new luminescent derivatives of triazole and carbazole is studied. It is demonstrated that compounds having fluoro- and trifluoromethyl- auxiliary acceptor moieties are applicable as emitters in host-free OLEDs. This research also aims to contribute to the development of efficient emitters exhibitting thermally activated delayed fluorescent by combining perfluorobiphenyl moiety and different donor moieties. The influence of different electron-donating substituents of perfluorobiphenyl moiety on the thermal, electrochemical, photophysical, and charge-transporting properties of perfluorobiphenyl derivatives is investigated.
May 27 d. 14:00
Rectorate Hall at Kaunas University of Technology (K. Donelaičio 73-402, Kaunas)
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