Surface plasmon resonance of silver nano‐dendrites improved light absorption in an organic photovoltaic active layer

Abstract

Surface plasmon resonance (SPR) or so-called plamonics behaviour is well-known for its tunability along the light absorption spectrum. Additionally, there are number of parameters alteration could be tuned to tailor the materials’ characteristics towards any special needs of the application. In this work, the authors report a novel metallic structure of silver nano-dendrites (Ag NDs) fabricated using electrochemistry deposition technique. This Ag NDs was implemented in the active layer of an organic photovoltaic to increase the light absorption in the intrinsic layer. The optical properties’ behaviour of these structures depicts that smaller assemblies can provide prominent SPR properties which will enhance the light trapping mechanism in the active layer of organic solar cells. The incident light will be trapped more efficiently and scattered extensively within the cell layers with the presence of Ag NDs arrays. The ultraviolet–visible and photoluminescence spectra show that the presence of Ag NDs enhances the absorption of light inside the organic solar cells’ layer compared to the original solar cell. The amount of collective light absorption at the active layer of an organic photovoltaic is very important in improving the efficiency of the device.