ИСТИНА

The invention relates to the organic-inorganic light-absorbing materials with perovskite structure, being used in perovskite solar cells production. The objective of the invention is to provide the possibility of obtaining perovskite using precursors that are in a liquid state without the use of additional substances and reagents. The concept of the invention is based on the fact that a light-absorbing material with perovskite structure with general formula ADB3, where A stands for methylammonium MA+ (CH3NH3+), formamidinium, FA+ ((NH2)2CH+), guanidinium Gua (C(NH2)3+), cesium Cs+ or a mixture thereof, B stands for Cl-, Br-, I- or a mixture thereof, while the component D represents Sn, Pb, Bi or a mixture thereof, is obtained by mixing composition AB-nB2 and a component containing D, where the component containing D is chosen from elemental Sn, Pb, Bi and/or their salts, mixtures, alloys, whereas the composition AB-nB2 is deposited onto the component D followed by subsequent removal of the excessive components, n is greater than or equal to one, the component B2 represents Cl2, Br2, I2 or a mixture thereof. 3 c, 7 C.