Surface Defect Clipping Strategy Enables High-Efficiency Inorganic Perovskite Solar Cells with Ultralow VOC Deficit

IF 7.3 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Sanlong Wang, Haipeng Jiang, Yunhao Gong, Yuechen Zhai*, Kailin Chi* and Ji Qi*, 
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Abstract

Recent developments in perovskite-silicon tandem solar cells (TSCs) have been quite remarkable. Inorganic perovskite solar cells (IPSCs) are gradually emerging as the top cells in the tandem device. However, IPSCs generally suffer from a severe open-circuit voltage (VOC) deficit, limiting their efficiency gains and application in TSCs. Here, we developed a surface defect clipping strategy using pyridyl-2,6-dicarboxamide (PD) in a methanol solution. The proper polarity of the methanol solution will clip the upper surface of the inorganic perovskite film and provide a corresponding path for penetration of the PD solution. In addition, PD efficiently in situ passivate uncoordinated Pb2+. After the annealing, dense perovskite films were formed on the upper surface of the inorganic perovskite. The crystallization dynamics of inorganic perovskites near the surface is regulated, and nonradiative recombination is effectively suppressed. Eventually, a record VOC of 1.259 V (1.71 eV) is achieved based on inverted IPSCs, and the VOC deficit is only 450 mV. More importantly, unencapsulated IPSC devices show significantly enhanced thermal and humidity stability.

Abstract Image

表面缺陷削除策略实现了超低挥发性有机化合物含量的高效无机过氧化物太阳能电池
最近,过氧化物硅串联太阳能电池(TSCs)的发展令人瞩目。无机包晶太阳能电池(IPSC)逐渐成为串联设备中的顶级电池。然而,IPSC 通常存在严重的开路电压(VOC)缺陷,限制了其效率的提高和在 TSC 中的应用。在这里,我们利用甲醇溶液中的吡啶-2,6-二甲酰胺(PD)开发了一种表面缺陷削除策略。甲醇溶液的适当极性会夹住无机过氧化物薄膜的上表面,并为 PD 溶液的渗透提供相应的路径。此外,PD 还能有效地原位钝化未配位的 Pb2+。退火后,无机包晶的上表面形成了致密的包晶薄膜。无机包晶表面附近的结晶动态得到调节,非辐射重组被有效抑制。最终,基于倒置 IPSC 的 VOC 达到了创纪录的 1.259 V(1.71 eV),VOC 缺陷仅为 450 mV。更重要的是,未封装 IPSC 器件的热稳定性和湿度稳定性显著增强。
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来源期刊
ACS Sustainable Chemistry & Engineering
ACS Sustainable Chemistry & Engineering CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
13.80
自引率
4.80%
发文量
1470
审稿时长
1.7 months
期刊介绍: ACS Sustainable Chemistry & Engineering is a prestigious weekly peer-reviewed scientific journal published by the American Chemical Society. Dedicated to advancing the principles of green chemistry and green engineering, it covers a wide array of research topics including green chemistry, green engineering, biomass, alternative energy, and life cycle assessment. The journal welcomes submissions in various formats, including Letters, Articles, Features, and Perspectives (Reviews), that address the challenges of sustainability in the chemical enterprise and contribute to the advancement of sustainable practices. Join us in shaping the future of sustainable chemistry and engineering.
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