首页|水系合成δ相甲脒铅碘钙钛矿粉末

水系合成δ相甲脒铅碘钙钛矿粉末

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近年来,甲脒基钙钛矿太阳能电池的光电转换效率取得了显著进展,其商业化前景日益明朗.随着钙钛矿电池商业化的快速发展,对于环境友好、成本低廉的钙钛矿前驱体的需求不断增长.甲脒铅碘钙钛矿材料遇水易分解,因此传统钙钛矿粉末合成方法依赖于有机溶剂和惰性气氛手套箱,不具备成本优势.在此背景下,本文提出了一种经济高效的水系合成高纯度δ相甲脒铅碘(δ-FAPbI3)粉末的策略.在水溶液中加入过量氢碘酸,碘离子可使不溶性PbI2转化为可溶性[PbI2+n]n-络合物,将FAPbI3的遇水分解转化为溶解,从而使水系合成成为可能.水系合成的甲脒铅碘粉末具有高纯度、低成本优势,可作为钙钛矿薄膜前驱体材料.与以PbI2和FAI的混合物作为前驱体制备的钙钛矿薄膜相比,以水系合成的δ-FAPbI3粉末为前驱体制备的钙钛矿薄膜具有良好的结晶性,降低了缺陷密度,并有效抑制了有害的离子输运和降解过程,从而增强了载流子传输性能和电池稳定性.在环境空气中以合成粉末为前驱体制备的钙钛矿太阳能电池,最高转化效率可达23.24％.
Aqueously synthesized δ-phase FAPbl3 for efficient perovskite solar cells
The notable advancements in boosting the power conversion efficiency(PCE)of formamidinium-based perovskite solar cells are progressively underscoring their commercialization potential.A fundamental requirement for the commercialization of perovskite photovoltaics is the es-tablishment of an environmentally friendly synthesis ap-proach capable of facilitating large-scale production.Conventionally,the manufacturing of this moisture-sensitive material depends on organic solvents and a glove box,a practice that is scarcely embraced by the industry.In this context,a cost-effective aqueous wet-chemical strategy was developed to synthesize stoichiometric δ-phase for-mamidinium lead triiodide(δ-FAPbI3)powder,which serves as a high-purity precursor for perovskite film deposition.Benefit from the presence of a high concentration of iodine in the aqueous solution,the insoluble Pbl2 transforms into so-luble[Pbl2+n]n-complexes,converting the decomposition of FAPbI3 into dissolution,and the aqueous synthesis becomes available.By utilizing synthesized δ-FAPbI3 powder,we pro-moted favorable crystallization in resulting perovskite films,which enhanced carrier transport properties and stability.Compared with perovskite films prepared by a mixture of Pbl2 and FAI as precursors,films by synthesized powder showcase preferred crystal orientation,and reduced trap densities,and effectively suppress detrimental ion transport and degradation processes.Consequently,we fabricated perovskite solar cells based on this synthesized powder in ambient air and achieved a maximum PCE of 23.24％.

perovskite microcrystal powderaqueous synthesisperovskite solar cells

潘逸宁、王镛皓、邓明欣、曾强、李林鸿、廖响、张茗珺、王伟、谢锋、刘芳洋

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School of Metallurgy and Environment,Central South University,Changsha 410083,China

School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430070,China

Department of Research and Development,Zhejiang Yitai Technology Co.Ltd.,Changsha 410205,China

Advanced Battery Materials Engineering Research Center of the Ministry of Education,Changsha 410083,China

School of Metallurgy,Northeastern University,Shenyang 110819,China

National Energy Metal Resources and New Materials Key Laboratory,Changsha 410083,China

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perovskite microcrystal powder aqueous synthesis perovskite solar cells

National Key Research and Development Program of ChinaNatural Science Foundation of Hunan Province of ChinaMajor Scientific and Technological Project of Changsha in 2022

2022YFB38033002021JJ10058kq2301002

2024

10.1007/s40843-024-2822-0

中国科学:材料科学(英文)

中国科学:材料科学(英文)

CSTPCD
ISSN：
年,卷(期)：2024.67(5)