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Mitigating the Lead Leakage of High-Performance Perovskite Solar Cells via In Situ Polymerized Networks
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-09-07 , DOI: 10.1021/acsenergylett.1c01487
Benfang Niu 1 , Haotian Wu 1 , Jinglin Yin 2 , Bruce Wang 3 , Gang Wu 1 , Xueqian Kong 2 , Buyi Yan 3 , Jizhong Yao 3 , Chang-Zhi Li 1 , Hongzheng Chen 1
Affiliation  

Despite the remarkable performance progress being made, environmental concerns remain for lead halide perovskite solar cells (PSCs) because of the possible water dissolution of lead ions (Pb2+) into the environment. Herein, we succeed in mitigating Pb leakage of PSCs, for the first time, via implanting in situ polymerized networks into perovskites. We strategically transform the dormant monomer additives into chelating polymer networks within perovskite layers, which not only passivate the defects of perovskite but also protect Pb2+ from water dissolution. The resultant perovskite–polymer hybrids have successfully enabled state-of-art power conversion efficiencies (PCEs) for inverted PSCs (PCE of 22.1%) and large-area modules (PCE of 15.7%). More importantly, up to 94% rejection rate of Pb2+ dissolution is achieved upon directly immersing the unencapsulated devices into water, which reasonably simulates the exposure of the broken and unprotected panels to torrential rain for 24 h.

中文翻译:

通过原位聚合网络减轻高性能钙钛矿太阳能电池的铅泄漏

尽管取得了显着的性能进步,但由于铅离子 (Pb 2+ )可能会水溶解到环境中,因此卤化铅钙钛矿太阳能电池 (PSC) 仍然存在环境问题。在此,我们通过将原位聚合网络植入钙钛矿中,首次成功地减轻了 PSC 的 Pb 泄漏。我们战略性地将休眠的单体添加剂转化为钙钛矿层内的螯合聚合物网络,不仅钝化钙钛矿的缺陷,还保护 Pb 2+从水溶解。由此产生的钙钛矿-聚合物杂化物成功地实现了倒置 PSC(PCE 为 22.1%)和大面积模块(PCE 为 15.7%)的最先进的功率转换效率(PCE)。更重要的是,将未封装的器件直接浸入水中可实现高达 94% 的 Pb 2+溶解去除率,这合理地模拟了破损和未受保护的面板暴露在暴雨中 24 小时。
更新日期:2021-10-08
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