两种互补受体的协同效应有助于高效铸态有机太阳能电池。

IF 21.1 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Mengyun Jiang, Bao Zhang, Peng Mao, Qian Guo, Yingqi Wang, Jiawei Qiao, Tao Zhang, Yongmin Luo, Quansong Li, Xiaotao Hao, Jianhui Hou, Jiaying Wu, Jin-Liang Wang, Qiaoshi An
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引用次数: 0

摘要

铸态有机太阳能电池(osc)具有低成本商业化生产的巨大潜力,但目前仍处于落后的发展阶段。本文将化学结构相似的两种小分子受体Y6和Y6- 10与聚合物给体D18结合制备铸态OSCs。这两个高度兼容的受体具有互补的带隙和能级,这有助于通过调制Y6/Y6- 10比在三元OSCs中实现短路电流密度和开路电压之间的最佳平衡。此外,成膜动力学、形态学和理论探索表明,易聚集的Y6- 10与D18的结合能比Y6和D18基团更大,导致活性层的成膜过程更快。通过控制三元矩阵中y6 - 10的含量,可以有效地控制D18的聚集,缩短成膜时间,形成有利于激子高效解离、电荷输运和收集的膜形态,从而减少能量损失,提高器件的填充系数。因此,两个受体的协同效应使得铸态三元器件获得了19.51%的最高功率转换效率(PCE)。这项工作展示了一种有效的方法,用三元策略来构建高性能铸态器件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synergistic effect of two complementary acceptors assists high-efficiency as-cast organic solar cells.

As-cast organic solar cells (OSCs) with great potential for low-cost commercial production are still in the backward stage of development. Herein, two small-molecule acceptors Y6 and Y6-1O with similar chemical structures were combined with polymer donor D18 to fabricate as-cast OSCs. The two highly compatible acceptors possess complementary bandgaps and energy levels, which contribute to achieving an optimal balance between the short-circuit current density and open-circuit voltage in ternary OSCs by modulating the Y6/Y6-1O ratio. Moreover, film-formation dynamics, morphological, and theoretical explorations reveal that the easily clustered Y6-1O shows a larger binding energy with D18 than that of the group of Y6 and D18, leading to a faster film-formation process of the active layer. Manipulating the Y6-1O content in the ternary matrix can effectively control the aggregation of D18 by shortening the film-formation time, and then forming profitable film morphology for efficient exciton dissociation, charge transport, and collection, thus reducing the energy loss and improving the fill factor of the device. Consequently, the synergistic effect of two acceptors results in the as-cast ternary device achieving a top-ranked power conversion efficiency (PCE) of 19.51%. This work demonstrates an effective approach with the ternary strategy to construct high-performance as-cast devices.

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来源期刊
Science Bulletin
Science Bulletin MULTIDISCIPLINARY SCIENCES-
CiteScore
24.60
自引率
2.10%
发文量
8092
期刊介绍: Science Bulletin (Sci. Bull., formerly known as Chinese Science Bulletin) is a multidisciplinary academic journal supervised by the Chinese Academy of Sciences (CAS) and co-sponsored by the CAS and the National Natural Science Foundation of China (NSFC). Sci. Bull. is a semi-monthly international journal publishing high-caliber peer-reviewed research on a broad range of natural sciences and high-tech fields on the basis of its originality, scientific significance and whether it is of general interest. In addition, we are committed to serving the scientific community with immediate, authoritative news and valuable insights into upcoming trends around the globe.
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