材料科学
有机太阳能电池
异质结
激子
制作
光电子学
接受者
聚合物太阳能电池
离解(化学)
能量转换效率
载流子
纳米技术
复合材料
聚合物
化学
物理化学
物理
医学
替代医学
病理
量子力学
凝聚态物理
作者
Huarui Zhang,Yuqiang Liu,Guangliu Ran,Hongxiang Li,Wenkai Zhang,Pei Cheng,Zhishan Bo
标识
DOI:10.1002/adma.202400521
摘要
Abstract Large‐area printing fabrication is a distinctive feature of organic solar cells (OSCs). However, the advance of upscalable fabrication is challenged by the thickness of organic active layers considering the importance of both exciton dissociation and charge collection. In this work, a bulk‐heterojunction‐buried (buried‐BHJ) structure is introduced by sequential deposition to realize efficient exciton dissociation and charge collection, thereby contributing to efficient OSCs with 500 nm thick active layers. The buried‐BHJ distributes donor and acceptor phases in the vertical direction as charge transport channels, while numerous BHJ interfaces are buried in each phase to facilitate exciton dissociation simultaneously. It is found that buried‐BHJ configurations possess efficient exciton dissociation and rapid charge transport, resulting in reduced recombination losses. In comparison with traditional structures, the buried‐BHJ structure displays a decent tolerance to film thickness. In particular, a power conversion efficiency of 16.0% is achieved with active layers at a thickness of 500 nm. To the best of the authors’ knowledge, this represents the champion efficiency of thick film OSCs.
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