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基于硅纳米孔(SiNHs)/银纳米颗粒(AgNPs)纳米复合薄膜制备了无机/有机物混合太阳电池,并且研究它们的光吸收谱和光电转换等性能。SiNHs/AgNPs纳米复合薄膜利用金属辅助化学刻蚀方法获得,然后在制备好的薄膜上旋涂一层有机聚合物PEDOT∶PSS作为空穴传输层。从光吸收谱可以看出,有AgNPs的纳米复合薄膜有明显的吸收峰,并且在短波区域,相比于没有AgNPs的纳米复合薄膜,整体的吸收有较大的提高。同时,有AgNPs的太阳电池的短路电流密度和外量子效率均有明显的提高。尤其在对纳米复合薄膜表面进行钝化处理后,该混合异质结太阳电池的光电转换效率最高可达到5.5%。认为,这主要是由于AgNPs的局域表面等离激元共振效应和钝化减少纳米复合薄膜表面缺陷等原因使电池的性能有较大的提高。
Inorganic / organic hybrid solar cells were prepared based on SiNHs / AgNPs nanocomposite films and their properties such as light absorption spectra and photoelectric conversion were investigated. The SiNHs / AgNPs nanocomposite films were obtained by metal-assisted chemical etching. Then a layer of organic polymer PEDOT: PSS was spin-coated on the prepared films as a hole transport layer. It can be seen from the optical absorption spectra that the nanocomposite films with AgNPs have obvious absorption peaks, and in the short wavelength region, the overall absorption is greatly improved compared with the nanocomposite films without AgNPs. Meanwhile, the short circuit current density and external quantum efficiency of solar cells with AgNPs are obviously improved. Especially after passivating the surface of the nanocomposite film, the photoelectric conversion efficiency of the hybrid heterojunction solar cell can reach up to 5.5%. It is believed that this is mainly due to the local surface plasmon resonance effect of AgNPs and passivation to reduce the surface defects of nanocomposite films and other reasons for the battery performance has greatly improved.