N. Masimukku “Derivatives containing acridan, diphenyl sulfone or 1,8-naphthalimide moieties for organic light emitting diodes” doctoral dissertation defense

Thesis Defense

Author, Institution: Naveen Masimukku, Kaunas University of Technology

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

Scientific Supervisor: Dr. Asta Dabulienė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008) (2021–2022); Dr. Dalius Gudeika (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008) (2018–2021)

Scientific Advisor: Prof. Dr. Habil. Juozas Vidas Gražulevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)

Dissertation Defence Board of Materials Engineering Science Field:|
Prof. Dr. Hab. Arvaidas Galdikas (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008) – chairperson
Prof. Dr. Narine Durgaryan (Yerevan State University, Armenia, Natural Sciences, Chemistry, N003)
Prof. Dr. Saulius Grigalevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Prof. Dr. Jolita Ostrauskaitė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Prof. Dr. Irina Savchenko (Taras Shevchenko National University of Kyiv, Ukraine, Technological Sciences, Materials Engineering, T008)

 

The dissertation defence will be at the Meeting room at Santaka Valley of Kaunas University of Technology (K. Baršausko 59 – A228, Kaunas)

 

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

 

Annotation: The dissertation is devoted to the design, synthesis, and investigation of the properties of new electroactive donor-acceptor derivatives containing acridan, diphenyl sulfone or 1,8-naphthalimide moieties acridan, diphenyl sulfone or 1,8-naphthalimide moieties, with the aim to obtain perspective materials for the formulation of structure-properties relationship for the third generation of organic light-emitting diodes (OLEDs). Four series of new organic electroactive molecules have been designed, synthesized and characterized. New aryl-substituted derivatives of acridan were synthesized and employed as hosts for thermally activated delayed fluorescence (TADF)-based OLEDs. A new tetraphenyl substituted carbazolyl-disubstituted diphenyl sulphone was synthesized and its applicability as a TADF host for highly efficient OLEDs with low-efficiency roll-offs was demonstrated which showed maximum EQE of 23.3% with low efficiency roll-off, which only decrease by 4% (EQE = 22.3%) at 1000 cd/m2. New derivatives of 1,8-naphthalimide containing phenoxazine, phenothiazine and acridan donor exhibiting high electron mobility and red aggregation-induced emission (AIE)-active TADF were synthesized, and their applicability in OLEDs was demonstrated. These compounds were used as emitters in red electroluminescent devices. New derivatives of 1,8naphthalimide containing diphenylamino phenyl and vinyl diphenylamino phenyl donor moieties were synthesized and their applicability in OLEDs was demonstrated. These compounds were used as red fluorescent emitters in two different matrices to investigate electroluminescence properties.

January 19 d. 13:00

Meeting room at Santaka Valley of Kaunas University of Technology (K. Baršausko 59 – A228, Kaunas)

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