A-Site Cation Segregation in Alloyed Perovskite Solar Cells

IF 6.5 1区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Photonics Pub Date : 2024-11-25 DOI:10.1021/acsphotonics.4c01330

Zijin Ding, Hao Yang, Saisai Li, Di Wang, Yuanzhi Jiang, Mingjian Yuan

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Abstract

Organic–inorganic lead halide perovskites have emerged as a dominant candidate for third-generation photovoltaics technologies. Further improvement of both the photovoltaic power conversion efficiency and the long-term operational stability is crucial for the deployment of this technology. However, within the perovskite layer, the labile nature of the A-site alloyed composition can initiate cation segregation during crystallization and device operation, which potentially leads to device failure and hinders commercialization. In this Review, we provide a mechanistic overview of the underlying origins of cation segregation and summarize the characterization techniques and the implications of cation segregation on perovskite films and devices. By assessing the nature and effect of cation segregation, we further discuss the ongoing studies for mitigating the segregation, including the modified crystallization process, optimized thin-film fabrication, suppressed cation migration, and monitor external stress conditions. Finally, we outline challenges and potential methods in constructing homogeneous A-site alloyed perovskites for photovoltaic applications.

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合金化过氧化物太阳能电池中的 A 盐阳离子偏析

有机-无机卤化铅包晶石已成为第三代光伏技术的主要候选材料。进一步提高光电转换效率和长期运行稳定性对该技术的应用至关重要。然而，在过氧化物晶层中，A 位合金成分的易变性会在结晶和器件运行过程中引发阳离子偏析，从而可能导致器件失效并阻碍商业化。在本综述中，我们从机理上概述了阳离子偏析的根本原因，并总结了阳离子偏析对包晶石薄膜和器件的表征技术和影响。通过评估阳离子偏析的性质和影响，我们进一步讨论了正在进行的缓解偏析的研究，包括修改结晶工艺、优化薄膜制造、抑制阳离子迁移和监控外部应力条件。最后，我们概述了为光伏应用构建均质 A 位合金过氧化物所面临的挑战和可能的方法。

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来源期刊

ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

11.90

自引率

5.70%

发文量

438

审稿时长

2.3 months

期刊介绍： Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.