A crystalline conducting polymer for a top electrode of see-through polymer solar cells.
발표자
()
초록
내용
We introduce a conducting polymer (CP) top electrode based on poly(3,4-ethylenedioxythipohene):polystyrene sulfonate (PEDOT:PSS) for all solution-processed semitransparent polymer solar cells (AST-PSCs). For the direct and sequential treatment of CPs coated on the top of the device, we use a long perfluoroalkyl chain functionalized sulfonic acid, F-acid. The F-acid treatment spontaneously crystallized PEDOT at room temperature without affecting underlying layers, leading to a 4000-fold increase in electrical conductivity with the carrier mobility of 6.81 cm2 V-1 s-1. These AST-PSCs achieved the record power conversion efficiency of 10.9% and offered aesthetic appeal with a average visible transmittance of 26.0%. Also, the infrared reflectivity of CPs enabled blocking 76.3% of solar heat and excelled thermal insulation capability compared to commercial tint films. This is the first exploration of multifunctional CP-based AST-PSCs, assembling energy generation and thermal insulation features.