金纳米颗粒掺杂导电聚合物对有机-硅杂化光伏电池性能的影响研究

Properties of Organic/Inorganic Si Hybrid Solar Cells based on organic layer incorporating with gold nanoparticles

摘要:

本研究将金纳米颗粒掺入聚3, 4-乙烯二氧噻吩:聚苯乙烯磺酸（PEDOT:PSS）薄膜中，制备了有机-硅杂化光伏电池。与纯PEDOT:PSS-硅电池相比，掺入金纳米颗粒制备的杂化光伏电池的光电转化效率（PCE）提高了23%，达到12.85%。电池的电流密度-电压曲线（J-V）、外量子效率（EQE）和电容-电压曲线（C-V）测试结果表明，掺入金纳米颗粒后电池性能提高的主要原因在于电池的光学性能和电学性能得到了改善：在金纳米颗粒的等离子共振区域，电池对光的反射性能降低；金纳米颗粒还能提高PEDOT:PSS薄膜的导电率、增加该电池的内建电场，因此极大减少了电荷在传输过程中的损失，提高了电池中电荷的传输和收集效率。

Abstract:

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) layers incorporating with Au nanoparticles (NPs) have been explored for fabricating the hybrid Si/organic solar cells. After incorporating with Au NPs, the power conversation efficiency (PCE) of 12.85% has been achieved, which corresponds to ~23% improvement comparing with that of the pristine one. The current density-voltage (J-V), external quantum efficiency (EQE), and capacitance-voltage (C-V) results show that the enhancement of the devices can be ascribed to the optical and electrical effects caused by Au NPs. After incorporating with Au NPs, the reflection of the device where the wavelength regime coincides with the plasmonic region of Au NPs is reduced. Meanwhile, the conductivity of the PEDOT:PSS layer and the built-in electric field (Vbi) of the devices are enhanced, and both of them are beneficial for charge separation and collection, significantly suppressing the recombination process of the devices.