Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes

Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent applied to QD-converted light-emitting diodes (LEDs). The optical properties of the C C/S QDs characterized absorption spectroscopy photoluminescence spectroscopy. Additionally, efficiency was investigated. Their structural studied X-ray crystallography transmission electron microscopy. showed deep-blue light peaking at 425 nm. blue-light-emitting used as color-converting materials for near-ultraviolet LED-pumped blue LEDs combined yellow-light-emitting Zn-Cu-In-S/ZnS fabricate white LEDs. warm [(CIE x, CIE y) = (0.4088, 0.3987)], Tc 3488 K, Ra 61.2]. results indicate that have good potential application after further improvements their properties.