自组装固体硅量子点中的粒径分布（英文）  

Size Distribution in Self Assembled Solid State Si Quantum Dots

作　　者：贾旭光 ZHANG Tian LIN Ziyun CONIBEER Gavin JIA Xuguang(School of Materials Science & Engineering,Changzhou University,Changzhou 213164,China;School of Photovoltaic and Renewable Energy Engineering,University of New South Wales,Sydney,New South Wales 2052,Australia)

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]新南威尔士大学光伏与可再生能源学院,澳大利亚悉尼2052

出　　处：《常州大学学报（自然科学版）》2019年第5期36-41,共6页Journal of Changzhou University：Natural Science Edition

摘　　要：提出了一个用来定量分析胶体硅量子点光致荧光光谱的模型,得到量子点的粒径分布,并将此方法应用于固体硅量子点材料粒径分布的分析。结果表明:与胶体硅量子点相比,固体样品中硅量子点粒径分布更宽。这可能是由于固体样品硅在结晶过程中水平方向缺乏约束,因此形成的量子点为椭球形。纳米硅中粒径分布太宽会导致材料带隙分布变宽。减少量子约束效应,限制了这些材料在实际中的应用。In the previous work,a model was proposed to quantitatively explain the PL spectrum of colloidal Si quantum dot(QD)by inducing the quantum confinement effect and particle size distribution.In this work,this method is adapted for size distribution analysis of QDs in a solid matrix.Results shows that the size distribution of QDs in these solid samples is more widely spread compared to colloidal one.The possible reason is the lack of constraint in horizontal directions in these samples and thus the QDs become ellipsoidal.The wide distribution of QD size will cause the spread of bandgap and reduce the quantum confinement effect which limits the practical application of such materials.

关 键 词：硅量子点 粒径分布 光伏 光致荧光 

分 类 号：TK8[动力工程及工程热物理—流体机械及工程]