Anela Ivanova
Sofia University "St. Kliment Ohridski"
Abstract
Organic light emitting diodes (OLEDs) are among the optoelectronic devices subject to research intensive optimization . Due to wide-band-gap emitters, blue OLEDs suffer from relatively short lifetimes and comparatively low lighting efficiency. One of the approaches to improve their performance is the development of luminophores with potential for thermally activated delayed fluorescence (TADF). In our work, (TD)DFT computations are applied to design series of new organic compounds with the capacity to emit blue light and have feasible TADF. Optical properties and energy separation of the singlet and triplet excited states are used to assess the capacity for blue TADF-assisted emission. The rate constants of the various excited state deactivation processes are also evaluated. The relative importance of several molecular factors for accomplishing the desired luminescence characteristics is tracked. Following the derived molecular guidelines, several compounds are put forward as promising blue emitters for organic light-emitting diodes. They are synthesized and characterized experimentally, showing acceptable efficiency when implemented into OLED devices.
Speaker's Introduction
Prof. Anela is currently Dean of the Faculty of Chemistry and Pharmacy, Professor of Theoretical Chemistry, and Director of the Laboratory of Quantum and Computational Chemistry at Sofia University, Bulgaria. She obtained her PhD in Physical Chemistry from Sofia University in 2004, and has long been engaged in theoretical and computational chemistry, overseeing two Master’s programs.
Her research interests include drug delivery systems, organic light-emitting molecules, and self-organization of heterogeneous interfacial systems. She has led numerous national and EU-funded research projects, coordinated multiple high-performance computing initiatives, and has rich international academic experience in Germany/France/Slovakia, including Humboldt and Marie-Curie Fellowships. She is also active in international academic organizations, with profound experience in research, teaching and administration.
