Phenyltrimethylammonium as an Interlayer Spacer for Stable Formamidinium-Based Quasi-2D Perovskite Solar Cells

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2024-04-26 DOI:10.1007/s13391-024-00497-w

Bumjin Gil, Jinhyun Kim, Byungwoo Park

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Abstract

Quasi-2D perovskite materials possess great potential in improving the stability of perovskite solar cells due to their superior chemical and structural stableness compared to 3D counterparts. Here, commonly-used 3D formamidinum lead iodide (FAPbI₃) perovskite is alloyed by addition of quaternary cation phenyltrimethylammonium (PTMA) up to 33% (n = 5), which forms quasi-2D perovskite phase that acts beneficial to charge transport and stability. Since the detailed structural analyses regarding this quaternary ammonium salt is still lacking, we attempt to provide how the presence of 2D perovskite affects the crystal structure based on x-ray diffraction techniques. It is shown that PTMA cations directs FAPbI₃ to have textured orientation and reduced strains. This led to enhanced extraction of photogenerated carriers and reduced defects, making it promising material for solar cell applications. The champion device remains stable under 60 °C or 1 sun for 700 h, demonstrating its potential for optoelectronic devices requiring long-term stability.

Graphical Abstract

Abstract Image

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苯基三甲基铵作为稳定的甲脒基准二维过氧化物太阳能电池的层间垫片

准二维透辉石材料具有优于三维透辉石材料的化学和结构稳定性，因此在提高透辉石太阳能电池的稳定性方面具有巨大潜力。在这里，通过添加33%（n = 5）的季阳离子苯基三甲基铵（PTMA），将常用的三维甲酰胺碘化铅（FAPbI3）包晶石合金化，从而形成有利于电荷传输和稳定性的准二维包晶石相。由于目前还缺乏对这种季铵盐的详细结构分析，我们试图根据 X 射线衍射技术来说明二维包晶的存在如何影响晶体结构。结果表明，PTMA 阳离子使 FAPbI3 具有纹理取向并降低了应变。这提高了光生载流子的萃取率，减少了缺陷，使其成为太阳能电池应用的理想材料。冠军器件在 60 °C 或 1 个太阳下可稳定工作 700 小时，这证明了它在需要长期稳定性的光电器件方面的潜力。

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.