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Related Concept Videos

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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Efficient and Stable Inverted Perovskite Solar Modules Enabled by Solid-Liquid Two-Step Film Formation.

Juan Zhang1,2,3, Xiaofei Ji4, Xiaoting Wang2

  • 1Graduate School of Science and Technology, Hirosaki University, 3-Bunkyocho, Hirosaki, 036-8561, Japan.

Nano-Micro Letters
|May 2, 2024
PubMed
Summary

Researchers developed a novel solid-liquid two-step method for fabricating large-area perovskite solar modules (PSMs). This technique enhances film uniformity and perovskite crystallization, achieving 20.56% efficiency and improved stability for perovskite solar energy.

Keywords:
CrystallizationDefect passivationInverted perovskite solar cellsPerovskite solar modulesTwo-step film formation

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Significant efficiency gap between small-area perovskite solar cells and large-area perovskite solar modules (PSMs).
  • Challenges in achieving uniform large-area films and controlled perovskite crystallization hinder PSM efficiency.
  • Need for scalable and stable perovskite solar technology.

Purpose of the Study:

  • To address the efficiency and uniformity challenges in large-area perovskite solar module fabrication.
  • To develop an innovative method for producing uniform, large-area perovskite films with enhanced properties.
  • To improve the power conversion efficiency and stability of perovskite solar modules.

Main Methods:

  • Employed a solid-liquid two-step film formation technique combining vapor deposition and solution processing.
  • Utilized blade coating of organic ammonium halide solution onto evaporated lead iodide films.
  • Modified the NiOx/perovskite interface and incorporated Urea additives to reduce recombination and control crystallization.

Main Results:

  • Achieved uniform, large-area perovskite films with larger grains, fewer pinholes, and reduced defects.
  • Fabricated an inverted PSM on a 10x10 cm2 substrate with an active area of 61.56 cm2.
  • Attained a champion power conversion efficiency of 20.56% with significantly improved operational stability.

Conclusions:

  • The developed solid-liquid two-step method effectively resolves uniformity issues in large-area perovskite film fabrication.
  • The technique offers a promising pathway for scalable and efficient production of perovskite solar modules.
  • The enhanced film quality and interface engineering contribute to high efficiency and stability in PSMs.