用于高性能过氧化物太阳能电池的气体分子辅助全无机双界面钝化策略。

IF 14.3 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Fancong Zeng, Lin Xu, Jiahe Xing, Yanjie Wu, Yuhong Zhang, Huan Zhang, Chencheng Hu, Biao Dong, Xue Bai, Hongwei Song
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引用次数: 0

摘要

包晶石层上下界面的捕获态对非辐射载流子重组有重大影响。广泛使用的溶剂型钝化方法会导致表面成分的无序分布,给大面积包晶体太阳能电池(PSCs)的商业应用带来挑战。为解决这一问题,我们提出了一种新型 NH3 气体辅助全无机双界面钝化策略。通过对包晶石表面进行气体处理,NH3 分子显著提高了碘空位形成能(1.54 eV),并与未配位的 Pb2+ 结合,实现了无损钝化。同时,薄膜缺陷态的减少伴随着功函数的降低,从而促进了载流子在界面间的传输。此外,利用无机三聚磷酸钾(PT)构建了稳定的钝化层来管理底部界面缺陷,其 -P═O 基团有效缓解了带电缺陷,降低了 PVK 的载流子传输障碍和成核障碍,而 K+ 的梯度分布则提高了 PVK 薄膜的结晶质量。在双界面协同效应的基础上,有效面积为 0.1 cm2 的最佳含 MA PSCs 的效率达到了 24.51%,并且在老化(10-20% RH 和 20 °C)2000 h 后仍能保持初始值的 90%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Gas Molecule Assisted All-Inorganic Dual-Interface Passivation Strategy for High-Performance Perovskite Solar Cells.

The trap states at both the upper and bottom interfaces of perovskite layers significantly impact non-radiative carrier recombination. The widely used solvent-based passivation methods result in the disordered distribution of surface components, posing challenges for the commercial application of large-area perovskite solar cells (PSCs). To address this issue, a novel NH3 gas-assisted all-inorganic dual-interfaces passivation strategy is proposed. Through the gas treatment of the perovskite surface, NH3 molecules significantly enhanced the iodine vacancy formation energy (1.54 eV) and bonded with uncoordinated Pb2+ to achieve non-destructive passivation. Meanwhile, the reduction of the film defect states is accompanied by a decrease in the work function, which promotes carrier transport between the interface. Further, a stable passivation layer is constructed to manage the bottom interfacial defects using inorganic potassium tripolyphosphate (PT), whose ─P═O group effectively mitigated the charged defects and lowered the carrier transport barriers and nucleation barriers of PVK, while the gradient distribution of K+ improved the crystalline quality of PVK film. Based on the dual-interface synergistic effect, the optimal MA-contained PSCs with an effective area of 0.1 cm2 achieved an efficiency of 24.51% and can maintain 90% of the initial value after aging (10-20% RH and 20 °C) for 2000 h.

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来源期刊
Advanced Science
Advanced Science CHEMISTRY, MULTIDISCIPLINARYNANOSCIENCE &-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
18.90
自引率
2.60%
发文量
1602
审稿时长
1.9 months
期刊介绍: Advanced Science is a prestigious open access journal that focuses on interdisciplinary research in materials science, physics, chemistry, medical and life sciences, and engineering. The journal aims to promote cutting-edge research by employing a rigorous and impartial review process. It is committed to presenting research articles with the highest quality production standards, ensuring maximum accessibility of top scientific findings. With its vibrant and innovative publication platform, Advanced Science seeks to revolutionize the dissemination and organization of scientific knowledge.
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