Abstract
Although encouraging progresses being made on the spin-coated prototype cells, organic solar cells still face significant challenges, yet to be explored, for up-scaling the multi-stacked photoactive layers in the construction of large area modules. Herein, high-performance opaque and semitransparent organic solar modules are developed via a bilayer-merged-annealing (BMA) assisted blade-coating strategy, achieving the impressive efficiencies of 14.79% and 12.01% with respect to active area of 18.73 cm2 , which represent the best organic solar minimodules so far. It is revealed that BMA strategy effectively resolves the de-wetting issues between polar charge transport layer solution and non-polar bulk heterojunction blends, hence improving the film coverage, along with electronic and electric contacts of multi-stacked photoactive layers. As results, organic solar modules coated under ambient condition successfully retain the high-efficiency of small area cells upon 312 times area scaling-up. Overall, this work provides a facile and effective method to fabricate high-performance organic solar modules under ambient condition. This article is protected by copyright. All rights reserved.
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