Author, Institution: Monika Čekavičiūtė, Kaunas University of Technology
Science Area, Field of Science: Technological Sciences, Materials Engineering – 08T
Scientific supervisor: Dr. Jūratė SIMOKAITIENĖ (Kaunas University of Technology, Technological sciences, Materials Engineering, 08T).
Dissertation Defence Board of Materials Engineering Science Field:
Prof. Dr. Saulius Grigalevičius (Kaunas University of Technology, Technological sciences, Materials Engineering – 08T) – pirmininkas,
Assoc. Prof. Dr. Mindaugas Andrulevičius (Kaunas University of Technology, Technological sciences, Materials Engineering – 08T),
Dr. Roman Lytvyn (Ivan Franko Nacional University of Lviv, Physical Sciences, Chemistry – 03P),
Dr. Aušra Tomkevičienė (Kaunas University of Technology, Technological sciences, Materials Engineering – 08T),
Prof. Dr. Habil. Sigitas Tumkevičius (Vilniaus University, Physical Sciences, Chemistry – 03P).
The Doctoral Dissertation is available at the library of Kaunas University of Technology (K. Donelaičio St. 20, Kaunas)
Annotation:
Nowadays the most important factor influencing the human society is quality of our life, which means cheap, sustainable and easily available energy. Consequently, research is focusing on a rapidly developing energy-harvesting and energy-saving organic optoelectronics devices, such as light-emitting diodes (OLED), field-effect transistors, and organic and hybrid photovoltaic cells. In OLEDs, organic semiconductors can be used as hosts of emitting layers, as charge-transporting materials, as exciplex forming materials and as emitters.
Derivatives of triphenylamine (TPA) represent one of the largest and one of the most widely studied and used class of organic electroactive materials. The ionization potentials likewise other properties of organic the derivatives of TPA may be amended by incorporation of different substituents, e.g. electron-donating methoxy groups, into their structures.
The aim of this dissertation was the synthesis and investigation of new methoxytriphenylamine-based low-molecular-weight organic semiconductors for optoelectronic devices. New phenylethenyl- and arylfluorenyl-substituted triphenylamines as organic semiconductors were synthesized and characterized. Their thermal, photophysical, electrochemical and photoelectrical properties were investigated. Some of synthesized organic semiconductors were applied in organic optoelectronic devices such as organic light-emitting diodes.
