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Updated: Aug 29, 2025

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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Hole-Transporting Vanadium-Containing Oxide (V2O5-) Interlayers Enhance Stability of α-FAPbI3-Based Perovskite Solar

Hyoungmin Park1,2, Seonghwa Jeong1, Eunsoo Kim1

  • 1Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea.

ACS Applied Materials & Interfaces
|September 8, 2022
PubMed
Summary

Atomic layer deposition-grown vanadium oxide enhances perovskite solar cell stability by preventing degradation. This method improves device longevity without compromising power conversion efficiency.

Keywords:
atomic layer depositionhole transport layerperovskite solar cellstabilityvanadium oxide

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Perovskite solar cells (PSCs) show high power conversion efficiency (PCE) comparable to silicon cells.
  • Device stability, especially in n-i-p structured PSCs, is a critical challenge due to the instability of Spiro-OMeTAD (Spi).

Purpose of the Study:

  • To enhance the stability of n-i-p perovskite solar cells by addressing perovskite degradation and Spi instability.
  • To develop a new hole transport layer using atomic layer deposition (ALD) for improved PSC performance and longevity.

Main Methods:

  • Fabrication of amorphous ALD-V2O5-x with oxygen-deficient traps as an interlayer on Spi.
  • Utilizing low-temperature (45 °C) ALD for V2O5-x deposition.
  • Characterization of the bifunctional Spi/ALD-V2O5-x interlayers in n-i-p PSCs.

Main Results:

  • The ALD-V2O5-x interlayer effectively blocks moisture and oxygen, significantly improving device stability.
  • Preservation of the photovoltaic α-FAPbI3 phase and suppression of Li and Au ion diffusion were observed.
  • PSCs with Spi/ALD-V2O5-x interlayers maintained high photovoltaic performance while exhibiting greatly enhanced operational stability.

Conclusions:

  • ALD-grown V2O5-x serves as an effective passivation and hole-transporting layer in n-i-p PSCs.
  • The developed bifunctional interlayer strategy offers a promising route to overcome stability limitations in high-efficiency perovskite solar cells.