量子点又称为纳米晶,是一种由Ⅱ-Ⅵ族或Ⅲ-Ⅴ族元素组成的纳米颗粒(粒径1～10nm),由于电子和空穴的量子限域效应,连续的能带结构变成分立的能级结构,受激后可以发射荧光。量子点的发光光谱可以通过量子点的粒径大小来调节。文章基于量子点的电致发光和光致发光的机理,主要介绍了近年来基于量子点的白光发光二极管的研究进展。 Quantum dots, also known as nanocrystals, are nanoparticles composed of II-VI or III-V elements (particle size 1-10 nm). Due to the quantum confinement effect of electrons and holes, the continuous band structure Into a discrete energy structure, the excitement can emit fluorescence. The emission spectrum of a quantum dot can be adjusted by the size of the quantum dot. Based on the quantum dot electroluminescence and photoluminescence mechanism, this paper mainly introduces the research progress of quantum dots-based white light-emitting diodes in recent years.