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<p>Exploring eco-friendly, low-cost, and chemically stable electron acceptor material is of great significance for the hybrid polymer-based solar cells (HPSCs). In this paper, Manganese tetroxide (Mn<sub>3</sub>O<sub>4</sub>) nanoparticles with a unique tetragonal and hexagonal lamellar structure (4–8&#xa0;nm) were successfully synthesized by solvothermal method, exhibiting an optical bandgap of 2.39&#xa0;eV. The as-prepared Mn<sub>3</sub>O<sub>4</sub> nanoparticles were used as electron acceptors for HPSCs blended with a conjugated polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene](MEH-PPV)<sub>,</sub> and delivered a power conversion efficiency (<i>η</i>) of 0.73%. Notably, decorating Mn<sub>3</sub>O<sub>4</sub> with the reduced graphene oxide (rGO) to form rGO–Mn<sub>3</sub>O<sub>4</sub> composites significantly improved device efficiency by 38.4%, reaching a <i>η</i> of 1.01%. This enhancement is attributed to the extended electron lifetime facilitated by the formation of rGO–Mn<sub>3</sub>O<sub>4</sub> composite, which provides abundant exciton separation interfaces, thereby promoting efficient exciton separation and charge transfer. These findings offer a new strategy for designing high-performance, sustainable electron acceptor materials for HPSCs.</p>

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Improved photovoltaic performance of polymer/Mn3O4 solar cells decorated with reduced graphene oxide

  • 期刊论文

  • 发表日期：

    2025年12月20日

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  • Weili Meng,
  • Chao Dong,
  • Jiafeng Zhou,
  • Hongwei Cheng,
  • Qingqing Wang

摘要

Exploring eco-friendly, low-cost, and chemically stable electron acceptor material is of great significance for the hybrid polymer-based solar cells (HPSCs). In this paper, Manganese tetroxide (Mn3O4) nanoparticles with a unique tetragonal and hexagonal lamellar structure (4–8 nm) were successfully synthesized by solvothermal method, exhibiting an optical bandgap of 2.39 eV. The as-prepared Mn3O4 nanoparticles were used as electron acceptors for HPSCs blended with a conjugated polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene](MEH-PPV), and delivered a power conversion efficiency (η) of 0.73%. Notably, decorating Mn3O4 with the reduced graphene oxide (rGO) to form rGO–Mn3O4 composites significantly improved device efficiency by 38.4%, reaching a η of 1.01%. This enhancement is attributed to the extended electron lifetime facilitated by the formation of rGO–Mn3O4 composite, which provides abundant exciton separation interfaces, thereby promoting efficient exciton separation and charge transfer. These findings offer a new strategy for designing high-performance, sustainable electron acceptor materials for HPSCs.