E. Skuodis “Synthesis and properties of bipolar emitters containing cyano groups” doctoral dissertation defence

Author, Institution: Eigirdas Skuodis, Kaunas University of Technology

Science area, field of science: Technological Sciences, Materials Engineering, T008

Summary of Doctoral Thesis: Summary

Scientific Supervisor: Dr. Aušra Tomkevičienė (Kaunas University of Technology, Technological
Sciences, Materials Engineering, T008)

Dissertation Defence Board of Materials Engineering Science Field:
Prof. Dr. Saulius Grigalevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008) – chairman,
Dr. Šarūnas Meškinis (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008),
Prof. Dr. Edvinas Orentas (Vilnius University, Natural Sciences, Chemistry, N003),
Prof. Dr. Arvydas Ruseckas (St. Andrew University, Scotland, Technological Sciences, Materials Engineering, T008),
Dr. Jūratė Simokaitienė (Kaunas University of Technology, Natural Sciences, Chemistry – N003).

The doctoral dissertation is available on the internet and at Kaunas University of Technology library (Donelaičio 20, Kaunas).

Annotation:

The development of science and industry gave the new technologies as an inseparatible part of the recent world. The new and effective technologies of lighting are creating on the increasing of energy cost and to maintain the environment. The inorganic light emitting diodes are effective and reliable technology for lighting, but its still expensive production is limiting the development. The organic light emitting diodes are not as effective and reliable, but they have some advantages with flexible and wide choice of colours; thus, they are applied for displays and give the possibility to make touchscreens. The third generation organic light emitting diodes with thermally activated delayed fluorescence emitters are showing high efficiency with low price and materials can be made without rare metals such as iridium or platinum. The new materials potentionaly exhibiting thermaly actyved delayed fluorescence were synthesised during this job and the perspective materials for the third generation organic light emitting diodes as emitters.

The perspective material 4,6-Bis(9,9-dimethylacridan-10-yl)isophthalonitrile exhibited thermally activated delayed fluorescence was synthesised during this job and explored as emitter in structure of organic light emitting diode which were exhibited 22.5% maximal external quantum efficiency, 20,700 cd/m2 maximal brightness and 62 lm/W maximal power efficiency of green light.