LUMINESCENCE OF COLLOIDAL CdSe:Cu NANOCRYSTALS

Abstract

The luminescence of Colloidal CdSe:Cu nanocrystals was studied. It is shown that copper doping does not lead to a noticeable change in the size of nanocrystallites. The change in the band gap width can be explained by the inter- impurity Coulomb interaction. It is shown that copper doping leads to quenching of exciton luminescence of CdSe. It is established that the long-wave luminescence of CdSe:Cu is caused by transitions within the donor- acceptor pairs, which include intrinsic and impurity Cu defects.