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Breakthrough in Nanotechnology: Researchers Develop Efficient Wide-Bandgap Perovskite Solar Cells

Strategic Insights

— 1 min read

Chinese researchers from the Beijing Institute of Technology have made a significant breakthrough in the field of nanotechnology, developing a new nanocrystal-nucleus template strategy that enhances the efficiency and stability of wide-bandgap perovskite solar cells. This innovative approach has resulted in a record open-circuit voltage of 1.30 V and a champion efficiency of 23.4%, as reported in the journal Advanced Materials.

Key Takeaways:

  • The new nanocrystal-nucleus template strategy addresses the root cause of phase separation in perovskite solar cells by precisely matching the I/Br ratio of nanocrystals to that of the target perovskite film.
  • This approach enables homogeneous assembly of Pb-I/Br octahedra, achieving exceptional halide uniformity and precise crystallization control for wide-bandgap films.
  • The nanocrystal-nucleus template simultaneously induces p-type doping and reduces the perovskite/C interfacial energy barrier, significantly enhancing charge extraction.
  • The broad applicability of this strategy is demonstrated across a wide bandgap range of 1.63-1.76 eV, all exhibiting (001)-preferred orientation and exceptional photostability.
  • When integrated into a monolithic perovskite/silicon tandem solar cell, the NCNT-based device delivers a high efficiency of 32.0% (certified 31.7%).
  • This research highlights the pivotal role of nanocrystals in regulating perovskite crystallization and establishes a scalable platform for next-generation optoelectronic devices and tandem photovoltaics.

Statistics:

  • 1.68-eV WBG PSCs fabricated via this approach achieve a record open-circuit voltage (V) of 1.30 V.
  • The champion efficiency of the NCNT-based device is 23.4%.
  • The NCNT-based device delivers a high efficiency of 32.0% (certified 31.7%) when integrated into a monolithic perovskite/silicon tandem solar cell.

Sources:

  • Advanced Materials (2025)
  • NewsRx, LLC (2025)
  • Beijing Institute of Technology, School of Materials Science and Engineering

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