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Related Concept Videos

P-N junction01:11

P-N junction

1.6K
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...
1.6K

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Updated: Apr 29, 2026

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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Synergistic Defect Passivation via Multiple Effects for High-Efficiency and Stable Perovskite Solar Cells.

Xing Guo1, Siyu Zhang2, Boyao Zhang3

  • 1Advanced Interdisciplinary Research Center for Flexible Electronics, Faculty of Infor-X, Xidian University, Xi'an, China.

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|April 28, 2026
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Summary

A new defect passivation strategy using 2-thiopheneethylammonium bromide (2-ThEABr) enhances perovskite solar cell (PSC) efficiency and stability. This method creates a 2D perovskite layer and passivates defects, boosting performance in various PSC compositions.

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Organic-inorganic perovskite solar cells (PSCs) show high power conversion efficiency (PCE) but are limited by defects causing nonradiative recombination.
  • Defect passivation is crucial for improving PSC efficiency and operational stability.

Purpose of the Study:

  • To develop a multi-effect synergistic defect passivation strategy for PSCs.
  • To investigate the dual role of 2-thiopheneethylammonium bromide (2-ThEABr) in defect passivation and film formation.

Main Methods:

  • Utilized 2-thiopheneethylammonium bromide (2-ThEABr) for synergistic defect passivation in PSCs.
  • Investigated the formation of a 2D perovskite layer on a 3D perovskite structure.
  • Analyzed the passivation of halide vacancies and undercoordinated Pb2+ sites by bromine and sulfur atoms from 2-ThEABr.

Main Results:

  • 2-ThEABr facilitated 2D perovskite formation and passivated defects, enhancing surface contact.
  • Achieved a champion PCE of 24.75% with a high open-circuit voltage (VOC) of 1.190 V for Cs0.05FA0.95PbI3-PSCs.
  • Demonstrated improved device stability, retaining 85% of initial efficiency after 1200 h of aging for unencapsulated devices.

Conclusions:

  • The synergistic passivation strategy using 2-ThEABr is effective and universally applicable to various PSC compositions.
  • This approach significantly enhances both the efficiency and stability of perovskite solar cells.
  • Further development of defect passivation techniques is vital for unlocking the full potential of PSC technology.