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Pseudo-bilayer architecture enables high-performance organic solar cells with enhanced exciton diffusion length

Author

Listed:
  • Kui Jiang

    (City University of Hong Kong)

  • Jie Zhang

    (City University of Hong Kong)

  • Zhengxing Peng

    (North Carolina State University)

  • Francis Lin

    (City University of Hong Kong)

  • Shengfan Wu

    (City University of Hong Kong)

  • Zhen Li

    (City University of Hong Kong)

  • Yuzhong Chen

    (The Hong Kong University of Science and Technology, Clear Water Bay)

  • He Yan

    (The Hong Kong University of Science and Technology, Clear Water Bay)

  • Harald Ade

    (North Carolina State University)

  • Zonglong Zhu

    (City University of Hong Kong
    City University of Hong Kong)

  • Alex K.-Y. Jen

    (City University of Hong Kong
    City University of Hong Kong)

Abstract

Solution-processed organic solar cells (OSCs) are a promising candidate for next-generation photovoltaic technologies. However, the short exciton diffusion length of the bulk heterojunction active layer in OSCs strongly hampers the full potential to be realized in these bulk heterojunction OSCs. Herein, we report high-performance OSCs with a pseudo-bilayer architecture, which possesses longer exciton diffusion length benefited from higher film crystallinity. This feature ensures the synergistic advantages of efficient exciton dissociation and charge transport in OSCs with pseudo-bilayer architecture, enabling a higher power conversion efficiency (17.42%) to be achieved compared to those with bulk heterojunction architecture (16.44%) due to higher short-circuit current density and fill factor. A certified efficiency of 16.31% is also achieved for the ternary OSC with a pseudo-bilayer active layer. Our results demonstrate the excellent potential for pseudo-bilayer architecture to be used for future OSC applications.

Suggested Citation

  • Kui Jiang & Jie Zhang & Zhengxing Peng & Francis Lin & Shengfan Wu & Zhen Li & Yuzhong Chen & He Yan & Harald Ade & Zonglong Zhu & Alex K.-Y. Jen, 2021. "Pseudo-bilayer architecture enables high-performance organic solar cells with enhanced exciton diffusion length," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20791-z
    DOI: 10.1038/s41467-020-20791-z
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    Cited by:

    1. Siwei Luo & Chao Li & Jianquan Zhang & Xinhui Zou & Heng Zhao & Kan Ding & Hui Huang & Jiali Song & Jicheng Yi & Han Yu & Kam Sing Wong & Guangye Zhang & Harald Ade & Wei Ma & Huawei Hu & Yanming Sun , 2023. "Auxiliary sequential deposition enables 19%-efficiency organic solar cells processed from halogen-free solvents," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    2. Hongmei Zhuo & Xiaojun Li & Jinyuan Zhang & Can Zhu & Haozhe He & Kan Ding & Jing Li & Lei Meng & Harald Ade & Yongfang Li, 2023. "Precise synthesis and photovoltaic properties of giant molecule acceptors," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    3. Yunhao Cai & Qian Li & Guanyu Lu & Hwa Sook Ryu & Yun Li & Hui Jin & Zhihao Chen & Zheng Tang & Guanghao Lu & Xiaotao Hao & Han Young Woo & Chunfeng Zhang & Yanming Sun, 2022. "Vertically optimized phase separation with improved exciton diffusion enables efficient organic solar cells with thick active layers," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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