Simplified surface defects of Sn-Pb perovskite for efficient all-perovskite tandem solar cells

IF 16.8 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2025-03-29 DOI:10.1016/j.nanoen.2025.110927

Yongxin Zhu , Ciyu Ge , Qi Xu , Dayu Liu , Peiyan Zhang , Xinzhi Zu , Chong Dong , Xuke Yang , Wenjiang Ye , Haojun Hu , Zhenkai Zhu , Zeyu Zhang , Juan Du , Shuping Pang , Long Hu , Haisheng Song , Ling Xu , Ying Zhou , Chao Chen , Jiang Tang

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Abstract

Alloyed Sn-Pb perovskites are demonstrating an increasingly important position due to ideal bandgaps for single and tandem applications. However, Sn incorporation would cause more complex defect management such as boosted deep defect density, serving as highly efficiently non-radiative recombination centers. Traditional one-step passivation methods cannot well passivate these complex defects, making it difficult to further improve open-circuit voltage and efficiency. To fundamentally solve this issue, here we develop a sequential passivation (se-passivation) approach to reconstruct defect types from complexity into simplicity, which then can be efficiently passivated by using well-developed comprehensive passivation strategies. Consequently, vacuum-assisted deposited Sn-Pb perovskite solar cells achieve a record open-circuit voltage of 0.91 V with a nonradiative loss as low as 60 mV. Combining with a 1.79- eV wide-bandgap front sub-cell, we delivered an astonishing efficiency of 28.16 % in all-perovskite tandem solar cells.

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由于在单晶和串联应用中具有理想的带隙，合金化锡铅包晶的地位日益重要。然而，锡的掺入会导致更复杂的缺陷管理，如增加深层缺陷密度，成为高效的非辐射重组中心。传统的一步法钝化方法不能很好地钝化这些复杂缺陷，因此很难进一步提高开路电压和效率。为了从根本上解决这一问题，我们在此开发了一种顺序钝化（se-passivation）方法，将缺陷类型从复杂重构为简单，然后利用成熟的综合钝化策略对其进行高效钝化。最终，真空辅助沉积的锡铅包晶石太阳能电池的开路电压达到了创纪录的 0.91 V，非辐射损耗低至 60 mV。结合 1.79 eV 宽带隙前子电池，我们在全包晶串联太阳能电池中实现了 28.16% 的惊人效率。

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来源期刊

Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

30.30

自引率

7.40%

发文量

1207

审稿时长

23 days

期刊介绍： Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.