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Related Concept Videos

P-N junction01:11

P-N junction

525
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...
525
Structures of Solids02:22

Structures of Solids

14.1K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
14.1K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.3K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.3K

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Enhancing the Interfacial Adhesion by a Novel Benzofuran-Substituted Self-Assembled Molecules for Thermal Cycle Stable Perovskite Solar Cells and Modules.

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Related Experiment Video

Updated: Jun 29, 2025

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
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Ordered Perovskite Structure with Functional Units for High Performance and Stable Solar Cells.

Yulong Wang1, Jiahui Chen1, Yuxi Zhang1

  • 1State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China.

Advanced Materials (Deerfield Beach, Fla.)
|April 4, 2024
PubMed
Summary

Novel perovskite solar cells (PSCs) with ordered structures (OSFU) suppress ion migration, enhancing operational stability. This breakthrough offers a promising solution for more durable and efficient photovoltaic devices.

Keywords:
fatigue behaviorfunctional unitsion migrationperovskite solar cellsstability

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Ion migration is a major challenge limiting the operational stability of metal-halide perovskite solar cells (PSCs).
  • Current strategies to mitigate ion migration in PSCs are limited.
  • Developing intrinsically stable perovskite materials is crucial for advancing solar energy technology.

Purpose of the Study:

  • To develop novel perovskite active layers that intrinsically suppress ion migration.
  • To enhance the operational stability and durability of perovskite solar cells.
  • To demonstrate the effectiveness of the ordered structures with functional units (OSFU) concept.

Main Methods:

  • Constructed novel perovskite active layers using the OSFU concept.
  • Fabricated a three-dimensional (3D) perovskite layer via vapor deposition for light absorption.
  • Deposited a two-dimensional (2D) perovskite layer via solution process for ion inhibition.

Main Results:

  • The activation energy for ion migration increased from 0.36 eV (conventional) to 0.54 eV (OSFU).
  • OSFU devices retained over 85% of their initial efficiency after 1200 hours under ISOS-L-1 conditions.
  • OSFU devices exhibited negligible fatigue and robust performance under light/dark cycling (ISOS-LC-1).

Conclusions:

  • The OSFU approach effectively suppresses ion migration in perovskite solar cells.
  • This strategy significantly enhances the operational stability and longevity of PSCs.
  • The functional motif theory shows promise for designing stable perovskite-based photovoltaic devices.