Ag纳米粒子在一维壳核式P3HT/CdS/TiO_2太阳电池中的应用

Application of the Ag nanoparticles in the one dimensional shell-core P3HT/CdS/TiO_2 solar cell

采用水热法在FTO导电玻璃上生长TiO_2纳米棒阵列膜,然后在CdCl_2和Na_2S水溶液中循环浸泡反应制备CdS/TiO_2壳核式纳米结构,利用电化学方法于光敏层CdS中引入了贵金属Ag纳米粒子,并将Ag纳米粒子沉积于两层CdS纳米晶壳层之间形成三明治结构,以避免Ag纳米颗粒直接暴露成为光生电荷的复合中心。在不同CdS/Ag/CdS光敏层厚度的TiO_2纳米阵列中旋涂P3HT薄膜组装杂化太阳电池,探索了Ag纳米粒子沉积量对电池光吸收性能及光伏性能的影响。结果表明,在光敏层中适量电沉积Ag纳米粒子电池光电转换效率可以达到0.13%,与没有贵金属沉积的电池结构相比可以提高28%。

TiO2 nanorod array films were grown on the FTO conducted glasses under hydrothermal condition. CdS/TiO2 shell-core nanostructures were prepared by immersing the TiO2 nanorod array films into the CdCl2 and Na2S solution successively for several times. Ag nanoparticles were induced into the CdS photosensitive layers through elctrodeposition. To avoid the Ag nanoparticles becoming the recombination centers, the Ag nanoparticls were deposited between the two layers of the CdS shells to form a sandwich structure. The P3HT thin layers were spincoated onto the TiO2 nanorod array films with different CdS/Ag/CdS photosensitive layers to assemble the hybrid solar cells. The effects of the Ag nanoparticle amounts on the optical absorption and photovoltaic performance of the solar cells were investigated. The results indicated that the conversion efficiency of the solar cell with appropriate amount of Ag nanoparticles could reach 0.13%, which was increased by 28% compared with the solar cell without Ag nanoparticles.