University of Toronto

Pukyong National University

Junghwan Kim

Edward Hartley Sargent

Ankit Jain

Oleksandr Voznyy

Makhsud I Saidaminov

Su Min Oh

Hyeon Kwang Kim

Na Hyun Kim

Sung Heum Park

An encapsulant for encapsulating perovskite to prevent lead leakage therefrom, a method for encapsulating perovskite to prevent lead leakage therefrom, and a perovskite photoactive device including the encapsulant are disclosed. The encapsulant for encapsulating perovskite may contain a crown ether-based compound having a benzene ring substituted with an alkyl group. The perovskite encapsulating method may include coating, on a perovskite layer, a solution in which a crown ether-based compound having a benzene ring substituted with an alkyl group is dissolved in an organic solvent. The perovskite photoactive device includes an encapsulant encapsulating the perovskite layer to prevent the lead leakage therefrom.

Encapsulant preventing lead leakage on perovskite, method for encapsulating perovskite to prevent lead leakage and perovskite photosensitive device comprising the same

Perovskites have high density of vacancies which absorb oxygen molecules and upon illumination, transform them into superoxide species which react with perovskites to decompose them, preventing use of these materials in many photo-applications. The present disclosure provides ways for improving the stability of perovskites in air ambient by doping perovskites with metals such as lead, cadmium, zinc, manganese, iron, cobalt, nickel, copper and tin which decreases the density of vacancies in perovskites and significantly increases the lifetime of perovskites. Perovskite solar cells containing inorganic and organic ions such as Cs+, formamidinium and methylammonium cations, Pb+, Br— and I— with these metal dopants exhibit stable efficiency within a month of storage in air ambient with the relative humidity of 50%.

Doped metal halide perovskites with improved stability and solar cells comprising same

Growing community of inventors

Busan, South Korea

Junghwan Kim