Bimetallic nanocomposites and the performance of inverted organic solar cell

The effect of local surface plasmon resonance (LSPR) of a metal nano-composites in polymer solar absorber was investigated with the view to improve the performance of thin film organic solar cell (TFOSC). The nano-particles are expected to improve photons harvesting by way of enhanced solar absorption and improved exciton dissociations. In this study, we are reporting the incorporation of two types bimetallic nanocomposites such as silver:zinc (Ag:Zn) and silver:magnesium (Ag:Mg) in conductive polymers blend composed of poly [[4,8-bis [(2-ethyhexyl)oxy] benzo(1,2-b:4,5-b’)dithiophene-2,6-diyl][3-uoro-2-[(2 ethylhexyl)carbonyl]thieno [3,4-b]thiophenediyl]] (PTB7) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The solar cells were fabricated in an inverted device architecture to enhance device stability and power conversion efficiency (PCE). The LSPR effect of Ag nano-particles (NPs) coupled with naturally abundant Zn and Mg NPs, which have remarkable electrical and optical properties, produced in an increased power conversion efficiency (PCE) of the solar cells by nearly 11% and 41%, respectively. The results are discussed based on the optical, electrical and morphological properties of the synthesized NPs and the fabricated devices.