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Related Experiment Video

Updated: May 16, 2025

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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Multidimensional Modulation via Tailored Covalent Organic Frameworks Enables Stable Inverted Perovskite Solar Cells

Tianzhou Yin1, Zimin Zhang1, Hualin Wu1,2

  • 1Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|May 15, 2025
PubMed
Summary

A novel covalent organic framework (COF) enhances perovskite solar cell performance by improving crystallization and interfaces. This leads to a record 26.21% power conversion efficiency and superior stability.

Keywords:
charge separationcovalent organic frameworkcrystallizationperovskite solar cellsstability

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Nanotechnology

Background:

  • Perovskite solar cells (PSCs) show promise but face efficiency and stability challenges.
  • Inadequate crystallization and interfacial defects hinder commercialization of PSCs.
  • Current strategies often fail to address multiple degradation pathways simultaneously.

Purpose of the Study:

  • To develop a novel material for multidimensional regulation of perovskite crystallization, defect states, and charge separation.
  • To enhance the efficiency and long-term stability of inverted perovskite solar cells.
  • To investigate the synergistic effects of a functionalized covalent organic framework on perovskite film quality and device performance.

Main Methods:

  • Synthesis of a hydrazine-linked covalent organic framework (COF) with alkane phosphate branches (12-SD-COF).
  • Integration of 12-SD-COF into the perovskite precursor solution.
  • Characterization of perovskite film morphology, crystal quality, and interfacial properties.
  • Fabrication and testing of inverted perovskite solar cell devices.

Main Results:

  • 12-SD-COF facilitated oriented crystallization and reduced defects in perovskite films.
  • Suppressed non-radiative recombination due to improved crystal quality.
  • Achieved a record power conversion efficiency (PCE) of 26.21% for COF-modified PSCs.
  • Demonstrated remarkable stability: >92% PCE retention after 800h at 85°C, 1000h in humidity, and 1200h under illumination.

Conclusions:

  • The 12-SD-COF acts as a multifunctional additive, simultaneously optimizing perovskite crystallization, defect passivation, and charge dynamics.
  • This approach significantly boosts both the efficiency and operational stability of perovskite solar cells.
  • The findings present a promising strategy for advancing PSC technology towards commercial viability.