Journal
ADVANCED MATERIALS
Volume 34, Issue 28, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202110569
Keywords
blade-coating; charge-transport layers; large-area; merged annealing; modules; organic solar cells
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Funding
- National Key Research and Development Program of China [2019YFA0705900]
- National Natural Science Foundation of China [21722404, 21674093]
- Zhejiang Natural Science Fund for Distinguished Young Scholars [LR17E030001]
- Zhejiang University [2019049]
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This study develops high-performance organic solar modules using a bilayer-merged-annealing-assisted blade-coating strategy and addresses challenges in large-scale module construction.
Although encouraging progress is being made on spin-coated prototype cells, organic solar cells (OSCs) still face significant challenges, yet to be explored, for upscaling 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 impressive efficiencies of 14.79% and 12.01% with respect to active area of 18.73 cm(2), which represent the best organic solar minimodules so far. It is revealed that the 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 result, organic solar modules coated under ambient conditions 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 conditions.
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