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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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Well-aligned Vertically Oriented ZnO Nanorod Arrays and their Application in Inverted Small Molecule Solar Cells
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Conjugated Polymer Semiconductors Enabled Multifunctional Interfacial Engineering for High-Performance Inverted

Jiadi Chen1,2, Cong Shao2,3, Liping Wang1

  • 1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|June 29, 2026
PubMed
Summary
This summary is machine-generated.

A new polymer interlayer, P4N-Cl, effectively passivates defects in perovskite solar cells. This enhances efficiency and stability, paving the way for commercialization of these advanced photovoltaic devices.

Keywords:
conjugated polymer semiconductorsdefect passivationinverted perovskite solar cellsmultifunctional interface engineeringpower conversion efficiency

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Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Interfacial defects between perovskite and electron transport layers (ETLs) hinder industrialization of perovskite solar cells.
  • Achieving high efficiency and long-term stability simultaneously remains a critical challenge.

Purpose of the Study:

  • To develop a novel interface interlayer to address the perovskite/ETL defect challenge.
  • To improve the efficiency and operational stability of inverted perovskite solar cells.

Main Methods:

  • Developed a multifunctional integrated polymer semiconductor, P4N-Cl, as an interface interlayer.
  • Utilized synergistic coordination mechanism of functional groups (carbonyl, Cl, sp2-N) for defect passivation.
  • Optimized energy level alignment and charge carrier dynamics at the perovskite/ETL interface.

Main Results:

  • P4N-Cl effectively passivated interfacial defects and suppressed non-radiative recombination.
  • Achieved a champion power conversion efficiency of 26.20% with an open-circuit voltage of 1.21 V.
  • Demonstrated excellent stability: 96.2% efficiency after 2016h aging in ambient air and 90.2% after 1500h under operational stress.

Conclusions:

  • The P4N-Cl interlayer offers a "one-stop" solution for high-efficiency, stable perovskite solar cells.
  • This design presents promising prospects for next-generation commercial perovskite solar cells.
  • Effective defect passivation and enhanced charge dynamics are key to device performance and longevity.