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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Reducing the confinement of PBDB-T to ITIC to improve the crystallinity of PBDB-T/ITIC blends
Qiuju Liang, Jie Han, Chunpeng Song, Xinhong Yu, Detlef- M. Smilgies, Kui Zhao*, Jiangang Liu*, Yanchun Han*, J. Mater. Chem. A 2018, 6, 15610-15620.
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Tianqi Niu, Jing Lu, Ming-Chun Tang, Dounya Barrit, Detlef- M. Smilgies, Zhou Yang, Jianbo Li, Yuanyuan Fan, Tao Luo, Iain McCulloch, Aram Amassian*, Shengzhong(Frank) Liu*, Kui Zhao*, Energy Environ. Sci. 2018, 11, 3358-3366.
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Perovskite—A Wonder Material for Photovoltaic and Optoelectronic Applications
Shengzhong Frank Liu; Yucheng Liu; Xuejie Zhu; Jiangshan Feng; Zhou Yang; Kui Zhao; Dong Yang, IEEE. 2018, 3503-3505.
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Y. Liu, Y. Zhang, K. Zhao, Z. Yang,* J. Feng, X. Zhang, K. Wang, L. Meng, H. Ye, M. Liu, S. (F.) Liu,* Adv. Mater. 2018, 1707314.
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Precursor Engineering for All-Inorganic CsPbI2Br Perovskite Solar Cells with 14.78% Efficiency
G. Yin, H. Zhao, H. Jiang, S. Yuan, T. Niu, K. Zhao, Z. Liu,* S. (Frank) Liu,* Adv. Funct. Mater. 2018, 1803269.
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Highly Efficient Ruddlesden–Popper Halide Perovskite PA2MA4Pb5I16 Solar Cells
Peirui Cheng, Zhuo Xu, Jianbo Li, Yucheng Liu, Yuanyuan Fan, Liyang Yu, Detlef- M. Smilgies, Christian Müller, Kui Zhao*, Shengzhong(Frank) Liu*, ACS Energy Lett. 2018, 3, 1975-1982.
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Phase Transition Control for High-Performance Blade-Coated Perovskite Solar Cells
Jianbo Li, Rahim Munir, Yuanyuan Fan, Tianqi Niu, Yucheng Liu, Yufei Zhong, Zhou Yang, Yuansi Tian, Bo Liu, Jie Sun, Detlef- M. Smilgies, Sigurdur Thoroddsen, Aram Amassian,* Kui Zhao,* Shengzhong(Frank) Liu,* Joule 2018, 2, 1313-1330.
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Phase Transition Control for High Performance Ruddlesden-Popper Perovskite Solar Cells
Xu Zhang, Rahim Munir, Zhuo Xu, Yucheng Liu, Hsinhan Tsai, Wanyi Nie, Jianbo Li, Tianqi Niu, Detlef-M Smilgies, Mercouri G. Kanatzidis, Aditya D. Mohite, Kui Zhao*, Aram Amassian*, Shengzhong(Frank) Liu*, Adv. Mater. 2018, 30, e1707166.
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Stable High-Performance Perovskite Solar Cells via Grain Boundary Passivation
Tianqi Niu, Jing Lu, Rahim Munir, Jianbo Li, Dounya Barrit, Xu Zhang, Hanlin Hu, Zhou Yang, Aram Amassian*, Kui Zhao*, Shengzhong(Frank) Liu*, Adv. Mater. 2018, 30, e1706576.
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Blade-Coated Hybrid Perovskite Solar Cells with Efficiency > 17%: An In Situ Investigation
Yufei Zhong, Rahim Munir, Jianbo Li, Ming-Chun Tang, Muhammad R. Niazi, Detlef- M. Smilgies, Kui Zhao*, Aram Amassian*, ACS Energy Lett. 2018, 3, 1078-1085.