四种金属纳米杆粒子辐射特性的对比分析  

Comparative Analysis on Radiative Properties of Nanorods with Four Different Metal Materials

作　　者：张婧瑜[1] 朱彤[1] 安巍[1] 

机构地区：[1]同济大学机械与能源工程学院,上海200093

出　　处：《节能技术》2013年第1期3-5,10,共4页Energy Conservation Technology

基　　金：国家自然科学基金(51006074);河北省自然科学基金(E2010001240)

摘　　要：使用时域有限差分法(FDTD)对水介质中不同尺寸的Au、Ag、Cu和Al纳米杆粒子进行模拟,对其在可见光近红外波段的辐射特性随粒子几何参数的变化规律进行了对比分析。计算结果发现,Au和Cu纳米杆粒子消光光谱的波形比较相似,在同一直径下其衰减因子峰值随着长径比的增加而增加。细长状、较大直径的Au和Cu纳米杆粒子有利于提高粒子增强型太阳能电池的光电转换效率。Ag纳米杆粒子的长径比对其衰减因子的峰值和峰位都有较显著的影响,而Al纳米杆粒子的长径比对其衰减因子的峰值影响较小,但对其峰位的影响却十分显著。选用细长状的Al纳米粒子能够有效提高粒子在太阳能电池应用中对太阳能光谱的利用。To analyse the relationship between the radiation characteristics and the sizes of metal nanorods in the visible light and near infrared spectrum, the finite difference time - domain method （FDTD） is used to calculate the radiative properties of Au, Ag, Cu and A1 nanorods with different sizes in the wa- ter. The results show that the extinction spectrum of Au and Cu nanorods is similar, whose peak values in- crease with the L/D ratio of nanorods. The Au and Cu nanorods, with slender shape and larger diameters, will improve the photoelectric conversion efficiency of particle enhanced solar ceils. The L/D ratios of Ag nanorods have significant effects on the peak values and positions of extinction factors, while the L/D rati- os of AI nanorods have significant effects only on the peak positions of extinction factors, not on the peak values. And the A1 nanorods of slender shape can effectively improve the solar spectrum utilization on the application of solar cells.

关 键 词：纳米杆粒子 辐射特性 表面等离子体共振 

分 类 号：TK121[动力工程及工程热物理—工程热物理] TK519[动力工程及工程热物理—热能工程]