Enhancing the efficiency and stability of perovskite solar cells by incorporating MoS2 nanoparticles into the hole-transport layer

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-10-03 DOI:10.1016/j.optmat.2025.117581

A. Кabdiyeva, A. Zeinidenov, D. Abeuov, X. Rozhkova, A. Aimukhanov

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引用次数: 0

Abstract

In the paper, MoS₂ nanoparticles were incorporated into HTL PEDOT:PSS of PSC. The effect of their concentration on the morphology and structure of PEDOT:PSS, optical absorption spectra and photoelectric characteristics of PEDOT:PSS in PSC was studied in detail. MoS₂ nanoparticles were synthesized by laser ablation of MoS₂ in isopropanol. Comprehensive analysis of AFM and optical absorption showed that the addition of MoS₂ nanoparticles to HTL leads to an increase in the values of the root-mean-square deviation Sq and the optical band gap. Impedance spectroscopy was used to determine the role of MoS₂ nanoparticles in the charge transfer mechanism in HTL. The measurement results showed that the recombination resistance, which determines the charge recombination rate at the interface boundaries, increases, reaching a maximum value at a MoS₂ concentration of 6 wt%. A further increase in concentration leads to a decrease in the recombination resistance. Measurements of the current-voltage characteristics of PSC show that increasing the concentration of MoS₂ to 6 wt% leads to an increase in the light energy conversion efficiency to 19.19 %. It is explained that the improvement in the photovoltaic characteristics of the devices is associated with an improvement in the transport efficiency in HTL and charge separation at the HTL/perovskite interface, while their deterioration is associated with the release of nanoparticles to the HTL surface, which results in increased charge recombination at the interface boundaries. In addition, MoS₂ nanoparticles in PEDOT:PSS enhance the bond strength and act as a barrier, preventing moisture penetration and, therefore, preventing perovskite degradation.

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通过在空穴传输层中加入二硫化钼纳米颗粒来提高钙钛矿太阳能电池的效率和稳定性

本文将MoS2纳米粒子掺入到PSC的HTL PEDOT:PSS中。详细研究了它们的浓度对PEDOT:PSS在PSC中的形貌和结构、光吸收光谱和光电特性的影响。采用激光烧蚀法在异丙醇中制备了二硫化钼纳米颗粒。原子力显微镜和光吸收的综合分析表明，在HTL中加入二硫化钼纳米粒子导致了均方根偏差Sq值和光学带隙的增加。阻抗谱法测定了二硫化钼纳米粒子在HTL中电荷转移机制中的作用。测量结果表明，决定界面边界电荷复合速率的复合电阻增大，在MoS2浓度为6 wt%时达到最大值。浓度的进一步增加导致复合阻力的降低。对PSC的电流电压特性的测量表明，将MoS2的浓度增加到6 wt%，光能转换效率提高到19.19%。研究解释说，器件光伏特性的改善与HTL传输效率的提高和HTL/钙钛矿界面上电荷分离有关，而其恶化与纳米颗粒释放到HTL表面有关，这导致界面边界处电荷重组增加。此外，PEDOT:PSS中的MoS2纳米颗粒增强了结合强度，并作为屏障，防止水分渗透，从而防止钙钛矿降解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.