Synthesis of Highly Luminescent InP/ZnS Quantum Dots and Fabrication of White Light-Emitting Diodes

摘要

Monodisperse InP nanocrystals were prepared with solvothermal method followed by size-selective precipitation. The luminescent properties were improved after coating the InP core with ZnS shell in a facile heating-up method. An alternation in the sequence of size-selective precipitation step and ZnS coating step rendered InP/ZnS core/shell quantum dots with higher fluorescence quantum yield (22-63%). The quantum dots embedded in a polymer matrix were incorporated on blue light-emitting diodes as the light converter to fabricate white light-emitting diodes (W-LEDs).