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Governing PbI6 octahedral frameworks for high-stability perovskite solar modules
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2022-09-03 , DOI: 10.1039/d2ee02162e
Qifan Feng, Xiaofeng Huang, Ziheng Tang, Yaolin Hou, Qing Chang, Siqing Nie, Fang Cao, Xiaoying Niu, Jun Yin, Jing Li, Nanfeng Zheng, Binghui Wu

Featuring soft ionic lattices of PbI6 octahedral frameworks, halide perovskites confront multiple occurrences of force-driven structural collapse (e.g., humidity, heat and illumination), initially on the surface and finally in the bulk, and ultimately protecting unstable PbI6 octahedral frameworks is necessary yet challenging in the process of perovskite–photovoltaic applications. Herein, a well-designed PbI6 octahedra-governing strategy with the functional synergism of cations and anions from vinylaniline trifluoromethanesulfonate has been implemented. On the one hand, the SO3CF3 anions simultaneously anchor uncoordinated Pb2+ cations and replace unstable I ions on the PbI6 frameworks of the perovskite surface, effectively passivating the I defects and stabilizing the PbI6 octahedral structure. On the other hand, poly(vinylaniline) cations obtained by the UV-induced polymerization of vinylaniline trifluoromethanesulfonate on the perovskite surface trigger compressive stress on the bulk-phase PbI6 frameworks and inhibit ion migration of I under operating conditions. The anchoring-polymerization protection strategy is universal for modifying perovskite-involved multi-interfaces in large-area modules to tolerate harsh conditions (e.g., storage at 85 °C and 85% RH, working at 85 °C + one-sun illumination). Both high power conversion efficiency and stable continuous output on the as-modified modules were finally realized. Based on the above modules with multi-interfacial modification, a proof-of-concept outdoor automatic light-seeking photovoltaics-to-energy-storage system has been successfully demonstrated, showing great potential in building the future of stable and practical perovskite photovoltaics.

中文翻译:

管理用于高稳定性钙钛矿太阳能模块的 PbI6 八面体框架

卤化物钙钛矿以 PbI 6八面体骨架的软离子晶格为特征,面临多次力驱动的结构坍塌(例如,湿度、热和光照),最初在表面,最后在体块上,最终保护不稳定的 PbI 6八面体骨架。在钙钛矿-光伏应用的过程中是必要但具有挑战性的。在此,实施了精心设计的 PbI 6八面体调控策略,该策略具有来自乙烯基苯胺三氟甲磺酸盐的阳离子和阴离子的功能协同作用。一方面,SO 3 CF 3 -阴离子同时锚定未配位的 Pb 2+阳离子并取代钙钛矿表面PbI 6骨架上的不稳定I -离子,有效地钝化I -缺陷并稳定PbI 6八面体结构。另一方面,通过紫外诱导的乙烯基苯胺三氟甲磺酸盐在钙钛矿表面聚合获得的聚(乙烯基苯胺)阳离子在体相 PbI 6骨架上引发压应力,并在操作条件下抑制 I -的离子迁移。锚定聚合保护策略对于修改大面积模块中涉及钙钛矿的多界面以耐受恶劣条件(例如,在 85°C 和 85% RH 下储存,在 85°C + 单日照下工作)。最终在修改后的模块上实现了高功率转换效率和稳定连续输出。基于以上多界面改性的组件,成功展示了概念验证型户外自动寻光光伏到储能系统,在构建稳定实用的钙钛矿光伏未来方面展现出巨大潜力。
更新日期:2022-09-03
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