Abstract:
High-quality and uniform self-assembled molecule (SAM) films are critical for the controllable fabrication of high-performance inverted flexible perovskite solar cells (F-PSCs). However, solution-processed SAMs suffer from poor surface coverage and inadequate chemical anchoring on conducting substrates, especially for flexible substrates with high roughness, compromising the charge transport efficiency and device stability. Herein, we introduce thermal evaporation for depositing carbazole-phosphonic SAM films and establish the correlations between molecular configurations and surface properties. Vacuum-evaporated SAMs exhibit enhanced substrate coverage and surface wettability compared to solution-processed counterparts through the regulated molecular packing. The increased surface energy of vacuum-evaporated SAM films accelerates perovskite nucleation kinetics, balances growth rates across the films, and optimizes interfacial contact quality. Molecular configuration tailoring in the SAM backbones further refines the morphological quality and energetic alignment at the buried interface, thus promoting efficient charge transport and reduced non-radiative recombination loss. As a result, the optimized devices using vacuum-evaporated SAM films achieve an impressive power conversion efficiency (PCE) of 25.47% (certified 25.38%), among the highest PCEs reported for F-PSCs. Furthermore, the optimized devices demonstrate enhanced mechanical durability and operational stability, underscoring a practical methodology route toward efficient and stable F-PSCs.
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Kang Wang, Changji Gao, Zhuo Xu, Qingwen Tian,* Xiaojing Gu, Lu Zhang,
Shiang Zhang, Kui Zhao,* and Shengzhong (Frank) Liu*, Advanced Functional Materials. adfm.202101568.
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Zicheng Ding, Dongle Liu, Kui Zhao,* and Yanchun Han*, Macromolecules , 2021, 54, 9, 3907–3926.
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Editorial: Organic Semiconductors: Investigating the Processing-Structure-Property Relationships
Kui Zhao 1*, G. N. Manjunatha Reddy 2* and Yanchun Han 3* , Frontiers in Chemistry. 2021. 745170.
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Xin Song, Qian Li, Jiang Han, Chuang Ma, Zhuo Xu, Haojin Li, Peijun Wang, Zhou Yang,
Qingyue Cui, Lili Gao, Zewei Quan,* Shengzhong (Frank) Liu,* and Kui Zhao*, Advanced Materials, adma.202102190. -
QingyueCui, XinSong, YuchengLiu, ZhuoXu, HaochenYe, ZhouYang, KuiZhao*, Shengzhong (Frank)Liu*. Matter. 2021.05.018.
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Jun Yang, Tinghuan Yang, Dongle Liu, Yalan Zhang, Tao Luo, Jing Lu, Junjie Fang, Jialun Wen, Zhao Deng, Shengzhong (Frank) Liu, Lihua Chen*, Kui Zhao* , Solar RRL, 202100286.
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Lead-free molecular one-dimensional perovskite for efficient X-ray detection
Haojin Li, Xin Song, Chuang Ma, Zhuo Xu, Nuo Bu, Tinghuan Yang, Qingyue Cui, Lili Gao, Zhou Yang, Fei Gao, Guangtao Zhao, Zhaolai Chen, Zicheng Ding*, Kui Zhao*, Shengzhong (Frank) Liu, 2022, 64(1): 209-213.
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Junjie Fang, Zicheng Ding,* Xiaoming Chang, Jing Lu, Tinghuan Yang, Jialun Wen, Yuanyuan Fan, Yalan Zhang, Tao Luo, Yonghua Chen,* Shengzhong (Frank) Liu* and Kui Zhao*, J. Mater. Chem. A, 2021,9, 13297-13305.
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Film Formation Control for High Performance Dion–Jacobson 2D Perovskite Solar Cells
Xu Zhang, Tinghuan Yang, Xiaodong Ren, Lu Zhang, Kui Zhao,* Shengzhong (Frank) Liu*, Adv. Energy Mater. 2021, 2002733.
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Perovskite Solar Cells toward Eco-Friendly Printing
Xiaoming Chang, Yuanyuan Fan, Kui Zhao,* Junjie Fang, Dongle Liu, Ming-Chun Tang, Dounya Barrit, Detlef-M. Smilgies, Ruipeng Li, Jing Lu, Jianbo Li, Tinghuan Yang, Aram Amassian, Zicheng Ding, Yonghua Chen, Shengzhong (Frank) Liu,* and Wei Huang,* Research, 2021, 9671892.