| 초록 |
We demonstrate on cost-effective, ITO-free organic solar cells fabricated with a AgNW-PEDOT:PSS composite electrode. The composite films were prepared with a one-step spray-coating of a mixture composed of AgNW and a highly conductive, DMSO-treated PEDOT:PSS (hcPEDOT). The film-thickness, optical transmittance, and sheet resistance of AgNW-hcPEDOT hybrid electrodes were easily controlled by varying the spray deposition time. With AgNW-hcPEDOT composite electrodes, the devices exhibited high power conversion efficiencies of up to 2.16 %. In addition, the surface of the AgNW-hcPEDOT composite electrodes were further smoothened with an additional spray-coated PEDOT:PSS buffer layer, leading to reduced shorting and improved cell-efficiency. As a result, best performing devices with a AgNW-hcPEDOT electrode and a spray-coated PEDOT buffer exhibited efficiencies of up to 2.65 %, which was approaching that of conventional ITO-based devices. |
