Energy transfer in hybrid optoelectronic structures between perovskite nanocrystals and an organic matrix

•The nonradiative excitation energy transfer from perovskite CsPbBr3 NCs to conjugated polymer MEH-PPV matrix is considered.•The theoretical analysis is carried out based on the Förster theory.•The relative PL intensity of the MEH-PPV matrix is calculated as a function of the embed CsPbBr3 NC concentration.•The decrease of the PL intensity with an increase of the CsPbBr3 NC concentration is found both theoretically and experimentally.•The reasons for the quantitative distinctions between the experimental data and a results of the theoretical consideration are discussed.