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Related Concept Videos

Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

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Updated: May 10, 2026

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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A vacuum flash-assisted solution process for high-efficiency large-area perovskite solar cells.

Xiong Li1, Dongqin Bi2, Chenyi Yi1

  • 1Laboratory of Photonics and Interfaces, Department of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland.

Science (New York, N.Y.)
|June 11, 2016
PubMed
Summary

Large-area perovskite solar cells (PSCs) achieve high efficiency using a novel vacuum flash-assisted method. This breakthrough overcomes previous limitations, enabling scalable, high-performance solar energy solutions.

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Metal halide perovskite solar cells (PSCs) show promise for high solar-to-electric power conversion efficiency (PCE) and low cost.
  • Scaling up PSCs to large areas while maintaining high performance remains a significant challenge for practical applications.

Purpose of the Study:

  • To develop a scalable method for fabricating high-quality, large-area perovskite films for efficient solar cells.
  • To demonstrate the effectiveness of a vacuum flash-assisted solution processing technique.

Main Methods:

  • A simple vacuum flash-assisted solution processing method was employed to create perovskite films.
  • Large-area solar cells with an aperture area exceeding 1 square centimeter were fabricated using these films.

Main Results:

  • Shiny, smooth, and crystalline perovskite films of high electronic quality were obtained over large areas.
  • The fabricated solar cells achieved a maximum PCE of 20.5% and a certified PCE of 19.6%.
  • This represents a significant improvement over the previous best certified PCE of 15.6% for similarly sized PSCs.

Conclusions:

  • The vacuum flash-assisted solution processing method enables the production of highly efficient, large-area PSCs.
  • The method demonstrates excellent reproducibility and minimal hysteresis, paving the way for practical deployment of advanced solar technology.