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Related Experiment Video

Updated: Sep 10, 2025

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In Situ Polymerized Organic Salt Interlayer for Enhanced Performance in Printable Mesoscopic Perovskite Solar Cells.

Minghao Xia1, Xiaoyu Li1, Yongming Ma1

  • 1Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China.

Small Methods
|August 22, 2025
PubMed
Summary

Researchers developed a new buffer layer for perovskite solar cells (PSCs) using sodium thioctate (ST). This modification enhances interface stability and boosts power conversion efficiency in printable mesoscopic PSCs (p-MPSCs).

Keywords:
interface reliabilityinterlayerpolymerized organic saltprintable mesoscopic perovskite Solar cellsresidual stress

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Nanotechnology

Background:

  • High efficiency in perovskite solar cells (PSCs) depends on a stable buried interface.
  • Existing interfaces often lack the necessary durability for long-term performance.

Purpose of the Study:

  • To introduce a durable buffer layer at the buried interface of printable mesoscopic PSCs (p-MPSCs).
  • To enhance the performance and operational stability of p-MPSCs through interface modification.

Main Methods:

  • Modification of the mesoporous TiO2 electron transport layer with sodium thioctate (ST).
  • In situ polymerization of ST to form a cross-linked poly(ST) interfacial buffer layer.
  • Characterization of the modified interface and device performance.

Main Results:

  • Formation of a cross-linked poly(ST) buffer layer enhancing interface mechanical strength and reducing residual stress.
  • Effective defect passivation by carboxylate groups, minimizing non-radiative recombination.
  • Achieved a power conversion efficiency of 20.33% in p-MPSCs.
  • Demonstrated improved operational stability, retaining over 92% efficiency after 600 hours.

Conclusions:

  • The in situ polymerized ST buffer layer significantly improves the buried interface in p-MPSCs.
  • This approach leads to higher power conversion efficiency and enhanced operational stability for PSCs.