通过丁基铵阳离子添加剂改性提高反相 CsPbI2Br 包晶石太阳能电池的性能

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2024-11-02 DOI:10.1016/j.matlet.2024.137643

Yue Chen, Junwen Liu, Yongjie Wu, Ziqiao Wang, Jie Li, Xin Liu, Dingyu Yang, Xiao Wang

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摘要

目前，所有无机包晶体薄膜中的缺陷都限制了包晶体太阳能电池（PSCs）的效率和长期稳定性。在这项研究中，我们利用正丁基铵阳离子作为添加剂来提高 PSC 的性能。通过加入碘化正丁基铵，实现了结晶的改变，从而获得了晶粒尺寸更大的高质量 CsPbI2Br 包晶体薄膜。因此，与对照组 10.8% 的功率转换效率相比，添加 1 摩尔添加剂的倒置 PSCs 功率转换效率 (PCE) 提高了 13.0%。功率转换效率的提高主要归功于陷阱态的减少和倒置 PSC 内电荷重组的抑制。此外，添加剂的疏水性明显提高了铯铋硼 PSCs 的长期稳定性。

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Performance enhancement of inverted CsPbI2Br perovskite solar cells via butylammonium cation additive modification

Defects in all inorganic perovskite films currently limit the efficiency and long-term stability of perovskite solar cells (PSCs). In this study, we utilized the n-butylammonium cation as an additive to enhance the performance of PSCs. By incorporating n-butylammonium iodide, modifications in crystallization were achieved, resulting in high-quality CsPbI₂Br perovskite films with larger grain sizes. As a result, the inverted PSCs with 1 mol percent additive exhibited an enhanced power conversion efficiency (PCE) of up to 13.0%, compared to the control PCE of 10.8%. The improvement can be primarily attributed to reduced trap states and suppressed charge recombination within the inverted PSCs. Furthermore, the hydrophobic nature of the additive noticeably improved the long-term stability of CsPbI₂Br PSCs.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive