采用磁控溅射方法, 在多晶硅薄膜太阳电池表面沉积了不同粒径大小的Au纳米粒子, 利用粒径大小可调控的Au纳米粒子的局域表面等离激元共振增强效应(LSPR), 对入射光中的可见光区域实现“光俘获”; 采用UVvis吸收光谱对LSPR进行了研究, 结果表明, LSPR能够有效拓展Au纳米粒子的光谱响应范围(400~800nm), 并且, 随着Au纳米粒子粒径的增大, LSPR共振吸收峰呈现出明显“红移”; 同时, 通过SERS表征, 证实LSPR能够有效增强Au纳米粒子周围的局域电磁场强度; 最后, 多晶硅太阳电池的JV特性曲线表明, 当Au纳米粒子溅射时间为50s时, 多晶硅太阳电池光电转换效率(η)最高为14.8%, 比未修饰Au纳米粒子的电池η提高了42.3%。

Amino-functionalized mesoporous silica thin films (MTFs) are produced using surface active agent F127, and then gold nanoparticles are introduced into the pore channels to prepare the Au/SiO2 nanocomposite. After assembling the gold, the amino-functionalized MTF undergoes some shrinkage but remains a periodic structure as demonstrated by X-ray diffraction (XRD) patterns. The nanocomposite shows an acute characteristic diffraction peak assigned to (111) plane of the face-centered-cubic structure of gold, indicating that gold nanoparticles crystallize well and grow in a preferred orientation in the pore channels. The surface plasma resonance (SPR) absorption peak near 570 nm undergoes a red-shift accompanied by a strengthening of intensity when HAuCl4 is used to react with the amino groups on the internal pore surfaces for 4, 6, and 8 h. The simulative results are consistent with the experimental ones shows that the absorption property of the Au/SiO2 nanocomposite is influenced by the dipping time, which affects the size and volume fraction of embedded gold nanoparticles.