材料科学
结晶度
逐层
有机太阳能电池
图层(电子)
相(物质)
光活性层
化学工程
接受者
组分(热力学)
纳米技术
化学
聚合物
有机化学
复合材料
工程类
物理
热力学
凝聚态物理
作者
Runnan Yu,Guangzheng Wu,Yong Cui,Xueqi Wei,Ling Hong,Tao� Zhang,Chao Zou,Siqian Hu,Jianhui Hou,Zhan’ao Tan
出处
期刊:Small
[Wiley]
日期:2021-10-07
卷期号:17 (44)
被引量:49
标识
DOI:10.1002/smll.202103497
摘要
Abstract Layer‐by‐layer (LBL) deposition strategy enabling favorable vertical phase distributions has been regarded as promising candidates for constructing high‐efficient organic photovoltaic (OPV) cells. However, solid additives with the merits of good stability and reproducibility have been rarely used to fine‐tune the morphology of the LBL films for improved efficiency and stability. Herein, hierarchical morphology control in LBL OPV is achieved via a dual functional solid additive. Series of LBL devices are fabricated by introducing the solid additive individually or simultaneously to the donor or acceptor layer to clarify the functions of additives. Additive in the donor layer can facilitate the formation of preferable vertical component distribution, and that in the acceptor layer will enhance the molecular crystallinity for better charge transport properties. The optimized morphology ultimately contributed to high PCEs of 16.4% and 17.4% in the binary and quaternary LBL devices. This reported method provides an alternative way to controllably manipulate the morphology of LBL OPV cells.
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