Incorporating localized surface plasmon resonance (LSPR) into organic solar cells (OSCs) is a popular method for improving the power conversion efficiency (PCE) by introducing better light absorption. In this work, we designed a one-pot synthesis of Ag@SiO₂@AuNPs dual plasmons and observed an immense increase in light absorption over a wide range of wavelengths. Ag@SiO₂ plays the main role in enhancing light absorption near the ultraviolet band. The silica shell can also further enhance the LSP resonance effect and prevent recombination on the surface of AgNPs. The AuNPs on the Ag@SiO₂ shell exhibited strong broad visible-light absorption due to LSP resonance and decreased light reflectance. By utilizing Ag@SiO₂@AuNPs, we could enhance the light absorption and photoinduced charge generation, thereby increasing the device PCE to 8.57% and J_sc to 17.67 mA cm⁻², which can be attributed to the enhanced optical properties. Meanwhile, devices without LSPR nanoparticles and Ag@SiO₂ LSPR only showed PCEs of 7.36% and 8.18%, respectively.

将局部表面等离子体激元共振（LSPR）纳入有机太阳能电池（OSC）是一种通过引入更好的光吸收来提高功率转换效率（PCE）的流行方法。在这项工作中，我们设计了一锅法合成Ag @ SiO ₂ @AuNPs双等离激元，并观察到在宽波长范围内光吸收的巨大增加。Ag @ SiO ₂在增强紫外线带附近的光吸收中起主要作用。二氧化硅壳还可以进一步增强LSP共振效果，并防止AgNPs表面重组。Ag @ SiO ₂壳层上的AuNPs由于LSP共振而表现出很强的可见光吸收能力，并且光反射率降低。通过利用Ag @ SiO ₂@AuNPs，我们可以增强光吸收和光诱导电荷的产生，从而将器件PCE增加到8.57％，将J _sc增加到17.67 mA cm ^-2，这可以归因于增强的光学特性。同时，没有LSPR纳米颗粒和Ag @ SiO ₂ LSPR的器件的PCE分别仅为7.36％和8.18％。