Optical properties of thin nanohybrid films based on polyvinylcarbazole (PVK) and CdSe/ZnS quantum dots of core-shell type

摘要

The optical properties of thin nanohybrid films based on polyvinylcarbazole (PVK) and CdSe/ZnS quantum dots (QD) are studied. An optimal concentration of QD in the hybrid system is found to be equal to 15 × 10 ~(-3) nm ~(-3). The maximum transfer of excitation energy from the matrix to QD and, as a result, the maximum intensity of the material luminescence are observed at the QD/PVK weight ratio of 3: 1. The concentration range of luminescence quenching due to QD agglomeration is defined. The energy transfer between quantum dots and PVK macromolecules is studied experimentally. The evaluated Forster critical radius for energy transfer is R _0 = 5-6 nm.