▎ 摘　　要

In the past decades, development of organic solar cells has attracted significant interest owing to their light weight, flexibility, and low manufacturing costs. However, large area growth of organic photovoltaics is still limited due to their low efficiency which is an essential factor to be considered. An additional issue which should be addressed while designing these cells is the cost ineffectiveness and poor mechanical properties of indium thin oxide (ITO), commonly used as the transparent electrode for organic solar cells. Therefore, replacing ITO with nanostructured transparent electrodes has been the subject of many recent studies. In the current work, an efficient hybrid electrode based on graphene and aluminum nanoring arrays has been designed successfully in order to achieve ITO-free organic solar cells entailing a broadband performance enhancement and improved photocurrent density. Meanwhile, it has been demonstrated that the proposed structure can also offer multi-coloring characteristics aiming to obtain a dual function operation as both efficient nanostructured electrode and color filter, simultaneously. This dual functionality paves the way for self-powered color displays and building decorations. By employing finite-difference time-domain numerical simulations, an organic solar cell with broadband performance enhancement has been realized using the proposed hybrid nanostructured electrodes for each primary color. Owing to the light harvesting properties of the designed nanostructures, improved photocurrent densities of about 14.53-15.56 (mA/cm(2)) have been achieved while offering an enhanced solar absorption over the wavelength range of about 300-625 nm.