把包裹SiO2的金纳米棒(Au NRs@SiO2)掺杂到有机太阳能电池的活性层中, 利用表面等离子体共振效应来增强活性层对光的吸收, 从而提高有机太阳能电池的能量转换效率。研究了不同掺杂浓度和不同包裹厚度对电池性能的影响。结果表明, 掺杂浓度为1.5%时, 器件性能最佳, 能量转换效率达到4.02%; SiO2壳层厚度为3 nm时, 转换效率达到4.38%, 较标准电池提升了29.2%。

Au nanorods(NRs) wrapped with SiO2 shells(Au NRs@SiO2) were doped into the active layer of organic solar cells(OSCs). With these Au NRs-induced surface plasmon resonance effect to promote the light absorption of the active layer, power conversion efficiency(PCE) was significantly enhanced in our OSCs. The effects of both doping concentration of Au NRs and thickness of SiO2 shells on device performances were explored. The analysis results demonstrate that the best performing PCE is as high as 4.02% with 1.5% doping concentration of Au NRs, while its value can be further improved to 4.38% with an optimal SiO2 shell thickness of 3 nm, showing a large enhancement factor of 29.2%.