Colloidal thallium halide nanocrystals with reasonable luminescence, carrier mobility and diffusion length.

ABSTRACT: Colloidal lead halide based perovskite nanocrystals (NCs) have been recently established as an interesting class of defect-tolerant NCs with potential for superior optoelectronic applications. The electronic band structure of thallium halides (TlX, where X = Br and I) show a strong resemblance to lead halide perovskites, where both Pb²⁺ and Tl⁺ exhibit a 6s² inert pair of electrons and strong spin-orbit coupling. Although the crystal structure of TlX is not perovskite, the similarities of its electronic structure with lead halide perovskites motivated us to prepare colloidal TlX NCs. These TlX NCs exhibit a wide bandgap (>2.5 eV or <500 nm) and the potential to exhibit a reduced density of deep defect states. Optical pump terahertz (THz) probe spectroscopy

SUBMITTER: Mir WJ 

PROVIDER: S-EPMC5618336 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature