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Fused‐ring core nonfullerene acceptors (NFAs), designated “Y‐series,” have enabled high‐performance organic solar cells (OSCs) achieving over 18% power conversion efficiency (PCE). Since the introduction of these NFAs, much effort has been expended to understand the reasons for their exceptional performance. While several studies have identified key optoelectronic properties that govern high PCEs,...
We fabricated hydrophobic, stretchable, wrinkle‐patterned polydimethylsiloxane (PDMS) films via a metal‐assisted chemical etching (MACE) process using a Si master mold, which is a mask‐free technique for fabricating large‐area films. The wrinkle‐patterned PDMS surface prepared via MACE exhibited high hydrophobicity and stretchability, which are difficult to achieve with wrinkle‐patterned PDMS prepared...
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