Abstract
A flexible transparent electrode film is fabricated by coating the conductive polymer PEDOT:PSS using a solution-shearing process on PET film in which silver nanoparticles are embedded in intaglio grids patterned by a roll-to-roll thermal imprinting method. The composite electrode shows a sheet resistance of 20 Ω square−1 and a light transmittance of 82.9% at room temperature. An all-solution polymer solar mini sub-module is fabricated on the flexible electrode by further depositing ZnO and P3HT:PC61BM layers using the optimized solution-shearing process with subsequent printing of PEDOT:PSS and flat-screen printing of silver. The structure and morphology of the solution-shearing processed films examined by XRD and AFM show smoother surfaces and higher crystallinity than those of conventional spin-coated films. The solution-shearing-processed flexible polymer solar mini sub-module fabricated on an area of 36 cm2 shows a power conversion efficiency of 1.87% under an AM 1.5G solar simulator. Therefore, the solution-shearing process toward large-area flexible polymer solar module fabrication is successfully demonstrated.
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