E. Kasparavičius “Stability of organic hole transporting materials and ways to enhance it using carbazole and dithieno[3,2-b:2′,3′-d]-pyrrole derivatives” doctoral dissertation defence

Thesis Defense

Author, Institution: Ernestas Kasparavičius, Kaunas University of Technology

Science area, field of science: Natural Sciences, Chemistry, N003

Scientific Supervisor: Assoc. Prof. Dr. Tadas Malinauskas (Kaunas University of Technology, Natural Sciences, Chemistry, N003)

Dissertation Defence Board of Chemistry Science Field:
Prof. Dr. Saulius Grigalevičius (Kaunas University of Technology, Natural Sciences, Chemistry, N003) – chairman
Prof. Dr. Saulius Juršėnas (Vilnius University, Natural Sciences, Physics, N002)
Prof. Dr. Vytas Martynaitis (Kaunas University of Technology, Natural Sciences, Chemistry, N003)
Assoc. Prof. Dr. Jolanta Rousseau (Artois University, France, Natural Sciences, Chemistry, N003)
Prof. Dr. Habil. Sigitas Tumkevičius (Vilnius University, Natural Sciences, Chemistry, N003)

The dissertation defence takes place online.

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


Alternative energy sources can supply the growing demand for energy and one of the most promising energy sources are photovoltaic systems. Over the last decade, perovskite solar cells have attracted considerable scientific and industrial interest due to their uncomplicated production and high efficiency. Perovskite solar cell technology is rapidly approaching commercialization, however, this new technology still lacks sufficient understanding on the stability of the devices. In this PhD thesis degradation pathways in organic hole transporting materials used in perovskite solar cells were identified. Using newly gained knowledge new hole-transporting molecules capable of forming self-assembled monolayers on the surface on electrically conductive oxides have been synthesized and investigated. Tandem solar cells, demonstrating record efficiency, have been achieved using these new hole-transferring materials.



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