Abstract In photovoltaics, light harvesting is one of the critical factors for the enhancement of power conversion efficiency (PCE). Photon harvesting can be carried out by various methods in perovskite photovoltaic. The improved light harvesting can also be achieved by trapping the light by incorporating metallic nanoparticles at the interface or in the perovskite active layer itself. Either light is absorbed or scattered by metallic nanoparticles depending on the particle size. When light is absorbed by the nanoparticles (size 20 nm) act as sub-wavelength scattering centers of light and help in trapping incident light. In order to make use of dual effect poly-dispersed spherical aluminium nanoparticles (AlNPs) (size – 20–70 nm) were incorporated in the CH3NH3PbI3 perovskite solar cell at the PC61BM/Al electrode interface. As a result, there is an increase in the optical absorption in the AlNPs embedded device. A detailed study of optical absorption, absorbed light emission characteristics charge trap density and carrier concentration studies, photovoltaic property measurements indicates, improvement in power conversion efficiency arise due to enhancement in JSC. Evaluated device properties indicate that enhancement in JSC arises due to improvement in the active layer photon absorption by both scattering and plasmonic effect in addition to reduced series resistance.

中文翻译：

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使用铝纳米粒子修饰的 PC61BM 层定制 CH3NH3PbI3 钙钛矿光伏的光电特性

摘要 在光伏领域，光收集是提高功率转换效率（PCE）的关键因素之一。光子收集可以通过钙钛矿光伏中的各种方法进行。通过在界面处或钙钛矿活性层本身引入金属纳米粒子来捕获光，也可以实现改进的光收集。根据颗粒尺寸，金属纳米颗粒会吸收或散射光。当光被纳米颗粒（尺寸 20 nm）吸收时，它充当光的亚波长散射中心并有助于捕获入射光。为了利用双效多分散球形铝纳米粒子（AlNPs）（尺寸 - 20-70 nm），在 PC61BM/Al 电极界面处将 CH3NH3PbI3 钙钛矿太阳能电池纳入其中。因此，AlNPs 嵌入设备中的光吸收增加。对光吸收、吸收光发射特性、电荷陷阱密度和载流子浓度研究的详细研究、光伏特性测量表明，由于 JSC 的增强，功率转换效率提高。评估的器件特性表明，除了降低串联电阻之外，由于散射和等离子体效应改善了有源层光子吸收，导致 JSC 的增强。由于 JSC 的增强，电源转换效率的提高出现。评估的器件特性表明，除了降低串联电阻之外，由于散射和等离子体效应改善了有源层光子吸收，导致 JSC 的增强。由于 JSC 的增强，电源转换效率的提高出现。评估的器件特性表明，除了降低串联电阻之外，由于散射和等离子体效应改善了有源层光子吸收，导致 JSC 的增强。