The role of WSe2 nanoparticles in charge transport and recombination in a polymer solar cell


Akhatova Z. Aimukhanov A. Ilyassov B. Zeinidenov A. Seisembekova T. Alekseev A. Abeuov D.
July 2025Springer

Journal of Materials Science: Materials in Electronics
2025#36Issue 20

Organic solar cells (OSCs) are promising candidates for next-generation photovoltaics due to their lightweight, mechanical flexibility, and compatibility with low-cost, large-area fabrication. However, their commercial application remains limited by low charge carrier mobility and high recombination rates. In this study, we investigated the role of tungsten diselenide (WSe2) nanoparticles (NPs) in enhancing the charge transport and suppressing recombination in P3HT:PC61BM-based polymer solar cells. WSe2 NPs, synthesized via laser ablation in chlorobenzene, were incorporated into the bulk heterojunction (BHJ) active layer. Structural, optical, and electrical characterizations were performed using Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Ultraviolet – visible (UV–Vis), Photoluminescence (PL), Raman, and impedance spectroscopy. At the optimized concentration of 0.35 wt.% WSe2, the device exhibited a significant enhancement in performance, with the short-circuit current density (Jsc) increasing from 7.8 to 13.0 mA/cm2 and the power conversion efficiency (PCE) improving from 1.85% to 3.04%. Impedance analysis revealed that recombination resistance increased by a factor of 2.8 at optimal WSe₂ loading, indicating suppressed recombination and enhanced charge extraction. This work demonstrates a simple, scalable approach for improving OSC efficiency using solution-processed Transition metal dichalcogenides (TMD) nanoparticles and provides insights into the concentration-dependent trade-off between charge transport and recombination.



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Buketov Karaganda University, Scientific Center of Nanotechnology and Functional Nanomaterials, University Str., 28, Karaganda, 100028, Kazakhstan
Astana IT University, Mangilik El, EXPO C1, Astana, 010000, Kazakhstan

Buketov Karaganda University
Astana IT University

10 лет помогаем публиковать статьи Международный издатель

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