The improvement of the luminescent efficiency of semiconductor nanocrystals by surface treatment

摘要

Disclosed is a method for improving the luminescent efficiency of semiconductor nanocrystal comprising reacting a metal precursor and a chalcogenide precursor to prepare a semiconductor nanocrystal in a organic solvent under constant temperature; cooling the reaction mixture to stop growing the a semiconductor nanocrystal; separating the semiconductor nanocrystal from the reaction mixture; and subsequently contacting the separated semiconductor nanocrystal and a reducing agent, and a method for improving the luminescent efficiency of core-shell semiconductor nanocrystal comprising preparing a semiconductor nanocrystal core composition comprising a semiconductor nanocrystal core with coordinated thereto an organic dispersant and a organic solvent; adding a precursor to the semiconductor nanocrystal core composition to coat the semiconductor nanocrystal core; cooling the reaction mixture to stop growing the semiconductor nanocrystal shell; separating the core-shell semiconductor nanocrystal from the reaction mixture; and subsequently contacting the separated core-shell semiconductor nanocrystal and a reducing agent.