Lead triiodide perovskite quantum dots (FAPbI3 -PQD) have received widespread attention in the development of new generation solar cells. However, FAPbI3-PQD suffers from severe charge carrier recombination due to its defective surface matrix, which is mainly due to the detachment of oleic acid/oleylamine ligands from the PQD surface, thus affecting the photovoltaic performance and operational stability of PQD solar cells (PQDSC). sex. Recently, Zhang Xiaoliang, Sun Zhimei and others from Beihang University reported a phase transfer catalysis (PTC) method to modify the defective surface matrix of PQD to obtain efficient PQDSC.
During the PTC treatment of PQDs, 3-(trifluoromethyl)phenyltrimethylammonium iodide (3-CF3-PATAI) can form 3-CF3-PTAI/formamidine iodide (FAI ) complex with FAI It transfers FAI from polar solvents to non-polar solvents, thereby filling the FA+/I- vacancies in the PQD defective surface matrix, thereby effectively repairing the surface matrix and inhibiting the trap-assisted recombination of PQDs.
Mingxu Zhang et.al Renovating Surface Matrix of FAPbl3 Perovskite Quantum Dots via Phase-transfer Catalysis for 16.29% Efficiency Solar Cells EES 2024
DOI: 10.1039/D3EE03751G
https://doi.org/10.1039/D3EE03751G