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Coordination Nanosheets Stabilizing Efficient Tin-Based Perovskite Solar Cells.

Dhruba B Khadka1, Yan-Chen Kuo2, Yi Zhen Li2

  • 1Photovoltaic Materials Group, Center for GREEN Research on Energy and Environmental Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.

ACS Applied Materials & Interfaces
|April 24, 2025
PubMed
Summary
This summary is machine-generated.

Terpyridine-zinc(II) coordination nanosheets enhance tin-based perovskite solar cells by improving crystal quality and reducing defects. This leads to higher power conversion efficiency and better stability for tin perovskite solar cells (Sn-PSCs).

Keywords:
additivecoordination nanosheet, crystallizationoxidationtin perovskite

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Nanotechnology

Background:

  • Tin-based perovskites offer a less toxic alternative to lead-based perovskites for solar cells.
  • Key challenges for tin perovskite solar cells (Sn-PSCs) include efficiency limitations and instability due to Sn2+ oxidation.
  • Defect chemistry and poor crystallization hinder the performance of Sn-PSCs.

Purpose of the Study:

  • To enhance the optoelectronic performance and stability of tin-based perovskite solar cells (Sn-PSCs).
  • To address the issue of Sn2+ oxidation and improve perovskite film quality.
  • To investigate the role of terpyridine-zinc(II) coordination nanosheets (ZnTPY CONASHs) in Sn-PSC fabrication.

Main Methods:

  • Synthesis of terpyridine-zinc(II) coordination nanosheets (ZnTPY CONASHs) via liquid-liquid interfacial polymerization.
  • Incorporation of fragmented ZnTPY CONASHs into tin-based perovskite precursor solutions.
  • Formation of ZnTPY:SnI2 heterogeneous nuclei to direct perovskite crystallization.
  • Characterization of the modified perovskite films and device performance evaluation.

Main Results:

  • ZnTPY CONASHs effectively chelate with SnI2, promoting heterogeneous nucleation and enhancing tin-based perovskite crystallization.
  • The incorporation of ZnTPY CONASHs mitigates Sn2+ oxidation-related defects and reduces charge recombination.
  • Modified Sn-PSCs exhibit improved photoluminescence lifetime, indicating superior crystal quality.
  • The optimized Sn-PSC achieves a power conversion efficiency (PCE) of 11.59%, a significant increase from the control device's 9.14%.
  • Enhanced operational stability was observed for the encapsulated ZnTPY-modified Sn-PSCs.

Conclusions:

  • Terpyridine-zinc(II) coordination nanosheets are effective in regulating precursor coordination for high-quality tin-based perovskite films.
  • The use of ZnTPY CONASHs provides a viable pathway to overcome the limitations of Sn-PSCs.
  • This approach offers potential for developing more efficient and stable perovskite solar cell technologies.