TY - JOUR
T1 - Aqueous synthesis of perovskite precursors for highly efficient perovskite solar cells
AU - Zhu, Peide
AU - Wang, Deng
AU - Zhang, Yong
AU - Liang, Zheng
AU - Li, Jingbai
AU - Zeng, Jie
AU - Zhang, Jiyao
AU - Xu, Yintai
AU - Wu, Siying
AU - Liu, Zhixin
AU - Zhou, Xianyong
AU - Hu, Bihua
AU - He, Feng
AU - Zhang, Lin
AU - Pan, Xu
AU - Wang, Xingzhu
AU - Park, Nam-Gyu
AU - Xu, Baomin
PY - 2024/2/2
Y1 - 2024/2/2
N2 - High-purity precursor materials are vital for high-efficiency perovskite solar cells (PSCs) to reduce defect density caused by impurities in perovskite. In this study, we present aqueous synthesized perovskite microcrystals as precursor materials for PSCs. Our approach enables kilogram-scale mass production and synthesizes formamidinium lead iodide (FAPbI3) microcrystals with up to 99.996% purity, with an average value of 99.994 ± 0.0015%, from inexpensive, low-purity raw materials. The reduction in calcium ions, which made up the largest impurity in the aqueous solution, led to the greatest reduction in carrier trap states, and its deliberate introduction was shown to decrease device performance. With these purified precursors, we achieved a power conversion efficiency (PCE) of 25.6% (25.3% certified) in inverted PSCs and retained 94% of the initial PCE after 1000 hours of continuous simulated solar illumination at 50°C. © 2024 American Association for the Advancement of Science. All rights reserved.
AB - High-purity precursor materials are vital for high-efficiency perovskite solar cells (PSCs) to reduce defect density caused by impurities in perovskite. In this study, we present aqueous synthesized perovskite microcrystals as precursor materials for PSCs. Our approach enables kilogram-scale mass production and synthesizes formamidinium lead iodide (FAPbI3) microcrystals with up to 99.996% purity, with an average value of 99.994 ± 0.0015%, from inexpensive, low-purity raw materials. The reduction in calcium ions, which made up the largest impurity in the aqueous solution, led to the greatest reduction in carrier trap states, and its deliberate introduction was shown to decrease device performance. With these purified precursors, we achieved a power conversion efficiency (PCE) of 25.6% (25.3% certified) in inverted PSCs and retained 94% of the initial PCE after 1000 hours of continuous simulated solar illumination at 50°C. © 2024 American Association for the Advancement of Science. All rights reserved.
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U2 - 10.1126/science.adj7081
DO - 10.1126/science.adj7081
M3 - RGC 21 - Publication in refereed journal
C2 - 38301009
SN - 0036-8075
VL - 383
SP - 524
EP - 531
JO - Science
JF - Science
IS - 6682
ER -
