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


Кabdiyeva A. Zeinidenov A. Abeuov D. Rozhkova X. Aimukhanov A.
January 2026Elsevier B.V.

Optical Materials
2026#169

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.

Charge transport and recombination , MoS2 nanoparticles , Perovskite solar cell , Volt-ampere characteristics

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Buketov Karaganda University, Scientific Center of Nanotechnology and Functional Nanomaterials, University Str., 28, Karaganda, 100028, Kazakhstan

Buketov Karaganda University

10 лет помогаем публиковать статьи Международный издатель

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