中文摘要：

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。

英文摘要：

Quatum dot （QD）, also called nanocrystal, is a kind of nanoparticle with a diameter of 1-10 nm, consisting of Ⅱ-Ⅵ and Ⅲ-Ⅴ elements. Its continous energy levels get to be separated energy levels because of the quantum-confined effect of charges and holes, and it can emit light after excitation. The emission spectra of QD can be tuned by adjusting its diameter. In this paper, the research progresses of quantum dots-based WLED are reviewed from the points of electroluminescence and photoluminescence of QD.