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  1. Home
  3. Phase Homogeneity And Photothermal Stability In Fully Vacuum-processed Perovskite Solar Cells.
  1. Home
  3. Phase Homogeneity And Photothermal Stability In Fully Vacuum-processed Perovskite Solar Cells.

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Related Experiment Video

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

Phase Homogeneity and Photothermal Stability in Fully Vacuum-Processed Perovskite Solar Cells.

Isabella Poli1, Michele Sessolo2, Daniele Meggiolaro3

  • 1Center for Sustainable Future Technologies, Istituto Italiano di Tecnologia, via Livorno 60, Torino 10144, Italy.

ACS Energy Letters
|June 18, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Vacuum-deposited perovskite solar cells show excellent thermal stability. However, light exposure revealed degradation in Cs-containing films, while MA-containing and mixed halide films demonstrated long-term operational stability, highlighting crystallization

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Flash Infrared Annealing for Perovskite Solar Cell Processing
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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Solvent-free fabrication of perovskite thin films via vacuum deposition enhances long-term stability by avoiding residual solvents.
  • Mixed-cation perovskites are crucial for advancing photovoltaic performance and durability.
  • Understanding degradation mechanisms under thermal and light stress is essential for developing stable perovskite solar cells.

Purpose of the Study:

  • To investigate the thermal and light stability of vacuum-deposited mixed-cation perovskite compositions: FA0.8Cs0.2PbI3 and FA0.8MA0.2PbI3.
  • To identify degradation pathways and factors influencing stability under operational stress.
  • To evaluate the long-term operational stability of perovskite solar cells fabricated with promising compositions.

Main Methods:

  • Thermal evaporation of mixed-cation perovskite thin films (FA0.8Cs0.2PbI3 and FA0.8MA0.2PbI3).
  • Exposure to thermal stress (85 °C for 500 h) and light stress (continuous illumination).
  • Characterization of structural, optical, and morphological properties.
  • Fabrication and testing of perovskite solar cells under outdoor and indoor illumination conditions.

Main Results:

  • Both compositions exhibited excellent thermal stability, retaining properties after 500 h at 85 °C.
  • FA0.8Cs0.2PbI3 showed significant degradation under light due to CsI-rich segregations and associated defects.
  • Partial bromide substitution (FA0.8Cs0.2Pb-(I0.8Br0.2)3) improved film homogeneity and light stability.
  • Perovskite solar cells using FA0.8MA0.2PbI3 and FA0.8Cs0.2Pb-(I0.8Br0.2)3 maintained performance for four months outdoors and 900 h indoors.

Conclusions:

  • Vacuum-deposited mixed-cation perovskites, particularly those containing methylammonium (MA+), offer potential for long-lived perovskite photovoltaics.
  • High-quality crystallization processes are key to mitigating degradation pathways and achieving operational stability.
  • Careful compositional engineering, including halide mixing, can further enhance the stability of perovskite solar cells.