Low-Bandgap Porphyrins for Highly Efficient Organic Solar Cells: Materials, Morphology, and Applications

作者：Gao, Ke^*; Kan, Yuanyuan; Chen, Xuebin; Liu, Feng^*; Kan, Bin; Nian, Li^*; Wan, Xiangjian; Chen, Yongsheng; Peng, Xiaobin^*; Russell, Thomas P.^*; Cao, Yong; Jen, Alex K-Y^*

来源：Advanced Materials, 2020, 32(32): 1906129.

DOI：10.1002/adma.201906129

• organic solar cells
• porphyrin
• solar cell morphology

With developments in materials, thin-film processing, fine-tuning of morphology, and optimization of device fabrication, the performance of organic solar cells (OSCs) has improved markedly in recent years. Designing low-bandgap materials has been a focus in order to maximize solar energy conversion. However, there are only a few successful low-bandgap donor materials developed with near-infrared (NIR) absorption that are well matched to the existing efficient acceptors. Porphyrin has shown great potential as a useful building block for constructing low-bandgap donor materials due to its large conjugated plane and strong absorption. Porphyrin-based donor materials have been shown to contribute to many record-high device efficiencies in small molecule, tandem, ternary, flexible, and OSC/perovskite hybrid solar cells. Specifically, non-fullerene small-molecule solar cells have recently shown a high power conversion efficiency of 12% using low-bandgap porphyrin. All these have validated the great potential of porphyrin derivatives as effective donor materials and made DPPEZnP-TRs a family of best low-bandgap donor materials in the OSC field so far. Here, recent progress in the rational design, morphology, dynamics, and multi-functional applications starting from 2015 will be highlighted to deepen understanding of the structure-property relationship. Finally, some future directions of porphyrin-based OSCs are presented.

• 单位
  南开大学; 上海交通大学