Low Cost Fabrication of High Efficiency Polymer Solar Cells

Abstract

This paper presents a spin-coating process that makes the fabrication of polymer solar cells a low-cost and viable alternative to the costly silicon-based solar cells. The low-cost fabrication process entails spin-coating the PEDOT:PSS conducting polymer and the donor-acceptor bulk heterojunction (BHJ) layer onto the PET/ITO substrate. A cathode layer is then coated on top of the BHJ layer and the PET flexible substrate coated with ITO is the anode, the cathode and anode are the terminals needed for the generation of electricity. Spin-coating process is generally used for deposition of thin film onto flat surface where the coating material is applied on the center of the substrate to be coated. A very small quantity of the anode transport layer and BHJ blend is applied for uniformly coating the flexible substrate.