Reconstruction and Solidification of Dion-Jacobson Perovskite Top and Buried Interfaces for Efficient and Stable Solar Cells.

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-09-25 Epub Date: 2024-09-03 DOI:10.1021/acs.nanolett.4c03013

Jifei Wang, Guozheng Nie, Wenjin Huang, Yuanyuan Guo, Ying Li, Zhangqiang Yang, Yan Chen, Kang Ding, Ye Yang, Weike Wang, Le-Man Kuang, Kaike Yang, Dongsheng Tang, Yaxin Zhai

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Abstract

Quasi-two-dimensional (Q-2D) perovskites show great potential in the field of photonic and optoelectronic device applications. However, defects and local lattice dislocation still limit performance and stability improvement by nonradiative recombination, unpreferred phase distribution, and unbonded amines. Here, a low-temperature synergistic strategy for both reconstructing and solidifying the perovskite top and buried interface is developed. By post-treating the 1,4-phenylenedimethanammonium (PDMA) based (PDMA)MA₄Pb₅I₁₆ films with cesium acetate (CsAc) before thermal annealing, a condensation reaction between R-COO^- and -NH₂ and ion exchange between Cs⁺ and MA⁺ occur. It converts the unbonded amines to amides and passivates uncoordinated Pb²⁺. Meanwhile, it adjusts film composition and improves the phase distribution without changing the out-of-plane grain orientation. Consequently, performance of 18.1% and much-enhanced stability (e.g., stability for photo-oxygen increased over 10 times, light-thermal for T₉₀ over 4 times, and reverse bias over 3 times) of (PDMA)MA₄Pb₅I₁₆ perovskite solar cells are demonstrated.

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重构和凝固 Dion-Jacobson Perovskite 顶面和埋面，实现高效稳定的太阳能电池。

准二维（Q-2D）过氧化物在光子和光电器件应用领域显示出巨大的潜力。然而，缺陷和局部晶格位错仍然限制了非辐射重组、非优选相分布和非键合胺的性能和稳定性的提高。在此，我们开发了一种低温协同策略，既能重构又能固化包晶顶部和埋藏界面。通过在热退火前用醋酸铯（CsAc）对基于 1,4-亚苯基二甲胺（PDMA）的（PDMA）MA4Pb5I16 薄膜进行后处理，R-COO- 和 -NH2 之间会发生缩合反应，Cs+ 和 MA+ 之间会发生离子交换。它将未结合的胺转化为酰胺，并使未配位的 Pb2+ 钝化。同时，它还能在不改变平面外晶粒取向的情况下调整薄膜成分并改善相分布。因此，(PDMA)MA4Pb5I16 包晶体太阳能电池的性能提高了 18.1%，稳定性大大增强（例如，光氧稳定性提高了 10 倍以上，T90 光热稳定性提高了 4 倍以上，反向偏压稳定性提高了 3 倍以上）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.