The efficiency of perovskite solar cells is strongly influenced by defects at heterojunction interfaces and grain boundaries, including ionic defects, methylammonium vacancies, and uncoordinated Pb²?. The surface passivation using compounds containing quaternary ammonium salts or phosphonic acid can reduce these defects and improve quality of perovskite, optimize energy level alignment, enhance charge extraction and increase long-term stability of devices. The non-fully defined nature of defects, their density, and depth level complicate the selection of suitable passivation materials for absorber layer. The summer internship focuses on synthesis and characterization of dicationic compounds containing ammonium, quaternary ammonium and other groups for perovskite solar cells. During internship student will learn to carry out chemical reactions, monitor their progress, purify compounds, and identify their molecular structures.
Period of project implementation: 2026-07-01 - 2026-08-31
Project coordinator: Kaunas University of Technology
