High-Performance Perovskite Solar Cells Enabled by One-Dimensional Capping Layer with Conjugated Ligands

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2025-02-20 DOI:10.1021/acsami.4c21423

Yajing Tang, Xiangnan Sun, Peikun Zhang, Bingkun Tian, Peng Xu, Ying Jiang, Jinping Zhang, Zhiyuan Yan, Xiaoming Zhao, Zhuhua Zhang, Wanlin Guo

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Abstract

Forming a low-dimensional (LD) capping layer over the surface of three-dimensional (3D) perovskites has been a typical approach for stabilizing perovskite solar cells (PSCs). However, the performance of treated PSCs is still limited by inefficient charge transfer across the LD/3D interfaces. Here, we realized a 1D capping layer over the perovskite surface via post-treatment with a conjugated quinolinamine (QA) halide salt. In contrast to 2D perovskites, this unique configuration enables charge transfer between inorganic slabs and adjacent QA spacers in the capping layer, resulting in a reduced dielectric confinement effect and enhanced carrier mobility. In this way, the hole extraction from bulk perovskite is facilitated while non-radiative recombination is suppressed at the 1D/3D interface. As a result, we realized 1D/3D PSCs with a power conversion efficiency of 24.8%, along with negligible efficiency loss after 3500 h operation under the maximum power point tracking on 1 Sun illumination. Furthermore, our cells maintained over 95% initial efficiency after rigorous 1200 h damp-heat testing at high temperature (85 °C) and high humidity (85%) conditions, positioning our PSCs among the most stable 1D/3D PSCs.

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在三维（3D）包晶石表面形成低维（LD）覆盖层一直是稳定包晶石太阳能电池（PSCs）的典型方法。然而，经过处理的 PSCs 的性能仍然受到 LD/3D 界面电荷转移效率低下的限制。在这里，我们通过使用共轭喹啉胺（QA）卤化物盐进行后处理，在过氧化物表面形成了一维封盖层。与二维过氧化物相比，这种独特的结构实现了无机板和封盖层中相邻 QA 间隔之间的电荷转移，从而降低了介电约束效应，提高了载流子迁移率。这样，在 1D/3D 界面抑制非辐射重组的同时，促进了从体包光体中提取空穴。因此，我们实现了功率转换效率高达 24.8%的 1D/3D PSCs，而且在 1 Sun 照明的最大功率点跟踪下运行 3500 小时后，效率损失几乎可以忽略不计。此外，我们的电池在高温（85 °C）和高湿度（85%）条件下经过 1200 小时的严格湿热测试后，仍能保持 95% 以上的初始效率，使我们的 PSCs 成为最稳定的 1D/3D PSCs 之一。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.