胶体CdSe量子点的色度学特性研究

Colorimetrical study of colloidal CdSe quantum dots

使用化学胶体法合成了CdSe量子点,研究了样品的荧光量子产率,发现随CdSe量子点粒径的增大,荧光量子产率存在先增大后减小的现象.研究了CdSe量子点的色度学特性,通过对不同尺寸、不同粒径分布范围的CdSe量子点色度坐标的计算,讨论了粒径分布范围对其荧光颜色饱和度的影响,解释了为何难以获得高颜色饱和度的绿光量子点.利用红、蓝两种不同尺寸的量子点配制出白光样品,提出了估计配色后样品色度坐标的经验公式,结果显示白光样品色度坐标的实验值与经验公式估计值基本一致.

A series of colloidal CdSe quantum dots（QDs）were synthesized,and the photoluminescence（PL）quantum yield of CdSe nanocrystals was found to increase at first and then decrease with increasing size.The chromatic coordinates of samples with different size and different size distributions were calculated to see the influence of size distribution of CdSe QDs.And white QDs sample was prepared by mixing red and blue QDs.The experimental value of chromatic coordinates of the prepared sample coincide with that estimated according to the empirical formula.