材料科学
异质结
有机太阳能电池
沉积(地质)
太阳能电池
纳米技术
光电子学
化学工程
聚合物
复合材料
沉积物
生物
工程类
古生物学
作者
Hyun‐Kyoung Kim,Yuchan Heo,Yeji Na,Shafidah Shafian,BongSoo Kim,Kyungkon Kim
标识
DOI:10.1021/acsami.4c13237
摘要
The formation of bulk heterojunctions (BHJs) through sequential deposition (SqD) of polymer donor and nonfullerene acceptor (NFA) solutions offers advantages over the widely used single-step deposition of polymer:NFA blend solutions (BSD). To enhance the application of SqD in organic solar cell production, it is crucial to improve reproducibility and stability while maintaining a high efficiency. This study introduces a novel method termed cross-linking-integrated sequential deposition (XSqD) for fabricating efficient and reproducible BHJs. In this method, polymers are cross-linked using efficient 2Bx-4EO or 2Bx-8EO cross-linkers, which enhance the solvent resistance of the polymer donor layer against the solvents used for NFAs. This approach addresses the challenge of selecting a suitable solvent for NFAs, a major obstacle in SqD-processed OSCs. The utilization of 2Bx-4EO in XSqD leads to a significant increase in reproducibility compared to that of conventional SqD, coupled with a high-power conversion efficiency (PCE) of 14.1%. Furthermore, XSqD devices exhibit superior stability, showing only 1% and 6% reductions in their initial PCE after thermal stress at 80 and 120 °C for 50 h, respectively.
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