Crystallization Control for Ambient Printed FA-Based Lead Triiodide Perovskite Solar Cells
abstract：
Upscalable printing of high-performance and stable perovskite solar cells (PSCs) is highly desired for commercialization. However, the efficiencies of printed PSCs lag behind those of their lab-scale spin-coated counterparts owing to the lack of systematic understanding and control over perovskite crystallization dynamics. Here, we report the controlled crystallization dynamics achieved using an additive 1-butylpyridine tetrafluoroborate (BPyBF4) for high-quality ambient printed α-formamidinium lead triiodide (FAPbI3) perovskite films. Using in situ grazing-incidence wide angle X-ray scattering and optical diagnostics, we demonstrate the spontaneous formation of α-FAPbI3 and sol-gel from precursors during printing without the involvement of δ-FAPbI3. The addition of BPyBF4 delays the crystallization onset of α-FAPbI3, enhances the conversion from sol-gel to perovskite, and reduces stacking defects during printing. Therefore, the altered crystallization results in fewer voids, larger grains, and less trap-induced recombination loss within printed films. The printed PSCs yield high power conversion efficiencies of 23.50% and 21.60% for 0.09 cm2-area devices and 5 cm × 5 cm-area modules, respectively. Improved device stability is further demonstrated, i.e., approximately 94% of the initial efficiency is retained for over 2400 h under ambient conditions without encapsulation. This study provides an effective crystallization control method for the ambient printing manufacture of large-area high-performance PSCs.
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Interlayer reinforcement for improved mechanical reliability for wearable perovskite solar cells
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Biocompatible Metal-Free Perovskite Membranes for Wearable X-ray Detectors
Xinmei Liu, Qingyue Cui, Haojin Li, Shumei Wang, Qi Zhang, Wenliang Huang, Chou Liu, Weilun Cai, Telun Li, Zhou Yang, Chuang Ma, Lixia Ren, Shengzhong Frank Liu, Kui Zhao, ACS Appl. Mater. Interfaces. 2024, acsami.4c01069.
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“One‐Click Restart” Recycling of Metal‐Free Perovskite X‐ray Detectors
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High hardness metal-free perovskite based on hexamethylenetetramine for efficient X-ray detection
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