The Progress of Advanced QD Technology in Next Generation Display

Colloidal quantum dots (QDs) have been known to be the best candidates for emissive materials owing to their unique optical properties including high color purity and quantum efficiency. Cd-based QDs like CdSe, CdS, and CdTe have been extensively studied and their synthesis and application methods are very well developed, despite their potential harmful effects on health and the environment. Instead, InP QDs have been considered as the best alternative because of their band gaps corresponding to visible light as well as their relatively low toxicity. However, they could be easily oxidized to InPOx and have weak electronic tolerance to surface defects due to their relatively high covalent character. In this presentation, I will talk InP-based QDs showing almost unity photoluminescence quantum efficiency and long-term stability on high power blue irradiation. Based on this superior optical properties, the QDs could be applied for the color conversion pixels on blue OLED display.