Multifunctional Molecule Passivated Quasi-2D Perovskite Film for Efficient and Stable Luminescent Solar Concentrator

IF 18.5 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Functional Materials Pub Date : 2024-11-20 DOI:10.1002/adfm.202413553

Mingze Sun, Ying Chen, Shubing Tian, Mingming Zhang, Haokun Jiang, Kang Liu, Jixiang Xu, Fangxu Dai, Lei Wang, Zhongmin Zhou, Jun Xing

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Abstract

Quasi−2D perovskite films with multiple quantum well structures can provide a large Stokes shift and efficient photoluminescence (PL), which have great potential in the application of luminescent solar concentrators (LSCs). However, its low photoelectric conversion efficiency and poor stability remain obstacles to commercial application. Here, a multifunctional molecule additive octyltriphenylphosphonium bromide is introduced to prepare high-quality perovskite LSCs. The multifunctional molecule can simultaneously passivate perovskite cations and anions, reducing the defect sites and improving the photoluminescence quantum yield (PLQY) of the perovskite nanocrystals. Triphenylphosphine groups with high steric hindrance effect can hinder ion migration; the hydrophobic properties of the long alkyl chain prevent water erosion, which together improves the stability of the perovskite films. The multifunctional molecule passivated perovskite film has a high PLQY of 100% and retains 96% of the initial PL intensity after 30 days of indoor storage. The perovskite LSC device achieves a maximum optical efficiency of 6.5% at a geometric factor of 3.1. The findings open a new way to boost the performance of perovskite-based LSCs.

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用于高效稳定发光太阳能聚光器的多功能分子钝化准二维过氧化物薄膜

具有多重量子阱结构的准二维过氧化物薄膜可提供较大的斯托克斯偏移和高效的光致发光（PL），在发光太阳能聚光器（LSCs）的应用中具有巨大潜力。然而，其较低的光电转换效率和较差的稳定性仍然是商业应用的障碍。本文引入了一种多功能分子添加剂辛基三苯基溴化膦来制备高质量的过氧化物激光聚光器。这种多功能分子能同时钝化透辉石阳离子和阴离子，减少缺陷位点，提高透辉石纳米晶体的光量子产率（PLQY）。具有高立体阻碍效应的三苯基膦基团可阻碍离子迁移；长烷基链的疏水特性可防止水的侵蚀，这两点共同提高了透辉石薄膜的稳定性。多功能分子钝化包晶石薄膜的 PLQY 高达 100%，在室内存放 30 天后仍能保持 96% 的初始 PL 强度。在几何因子为 3.1 的条件下，该包晶 LSC 器件的最大光学效率达到了 6.5%。这些发现为提高基于包晶的 LSC 性能开辟了一条新途径。

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来源期刊

Advanced Functional Materials 工程技术-材料科学：综合

CiteScore

29.50

自引率

4.20%

发文量

2086

审稿时长

2.1 months

期刊介绍： Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.