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Ⅱ-Ⅴ族半导体是由第二副族元素(Zn,Cd)与第五主族元素(N,P,As等)形成的化合物.Ⅱ-Ⅴ半导体纳米晶(亦称量子点)具有禁带窄、Bohr半径大、电子有效质量小、通过改变量子点尺寸,能够实现宽波段发光,较Ⅱ-Ⅵ材料,其具有更多的共价键成分,性质稳定等优点,是应用于太阳能电池、生物标记及LED的理想材料.本文综述了近年来在Ⅱ-Ⅴ半导体纳米晶的研究中取得的进展,侧重介绍量子点的合成、表征、吸收光谱、光致发光谱及荧光寿命测定等领域内的最新成果,并对其发展方向进行了展望.
Group II-V semiconductors are compounds formed from the second subgroup of elements (Zn, Cd) and the fifth main group of elements (N, P, As, etc.) The II-V semiconductor nanocrystals Narrow, Bohr radius, the effective electron mass is small, by changing the size of quantum dots, can achieve a wide band of luminescence, compared with Ⅱ-Ⅵ material, which has more covalent bond components, the advantages of stable properties, is used in solar cells, Biomarkers and LED materials.In this paper, the progress in the research of Ⅱ-Ⅴ semiconductor nanocrystals in recent years is reviewed, focusing on the synthesis, characterization, absorption spectra, photoluminescence spectra and fluorescence lifetime determination of quantum dots The latest achievements and prospects of its development.