PHOTOVOLTAIC DEVICE BASED ON STABILIZED SEMICONDUCTOR FILMS OF CESIUM IODOPLUMBATE Russian patent published in 2024 - IPC H01L31/32 H01L31/101 

FIELD: electricity.

SUBSTANCE: invention relates to photoelectric converters based on semiconductor materials of perovskite type. Photovoltaic device comprises external process layers 0 and 6, denoting a substrate on which functional components of the solar battery are formed, or a barrier layer protecting the device from mechanical effects, as well as from the effect of oxygen and moisture in the air, wherein at least one of layers 0 or 6 must be transparent with respect to radiation in the spectral range of 400–900 nm with transmission of not less than 80%; layer 1 adjacent to layer 0 and layer 5 adjacent to layer 6 denote electrodes which collect positive - holes - and negative electrons, that are charge carriers, which are generated in the photovoltaic device under the action of light, wherein at least one of layers 1 or 5 must be transparent for radiation in the spectral range of 400–900 nm with transmission of not less than 80%; layer 2 adjacent to layer 1, and layer 4, adjacent to layer 5, are charge-transport and are intended for selective extraction of only one type of charge carriers and its transfer to corresponding electrode; layer 3 adjacent to layer 2 and layer 4 denotes a photoactive layer providing light absorption and generation of charge carriers, and containing not less than 90% of perovskite material based on cesium iodoplumbate and not more than 10 wt.% of a stabilizing additive represented by a single compound or a two-component or three-component mixture of compounds selected from cytosine, gamma-aminobutyric acid and isonipecotinic (4-piperidinecarboxylic) acid; perovskite material based on cesium iodoplumbate can be represented by pure CsPbI₃ or one of the modified compositions obtained either by partial replacement of lead cations with cations of other chemical elements M, that is CsPb_1-xM_2x/mI₃, where m is valence of M, and x < 0.3, or by partial substitution of cesium cations by other univalent cations A, that is Cs_1-yA_y/nPbI₃, where n is the valence of the cation A, and y < 0.2, or by partial replacement of iodine with other monovalent anions X, that is CsPbI_3-zX_z, where X=Br, SCN, CN, BF₄, HCOO, and z < 0.8, or a combination of said substitution methods.

EFFECT: invention provides high efficiency and long-term operational stability of perovskite solar cells based on cesium iodoplumbate and increases efficiency (efficiency >14%) and stability of perovskite solar cells.

16 cl, 5 dwg