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Related Concept Videos

P-N junction01:11

P-N junction

522
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...
522

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Related Experiment Video

Updated: Jun 27, 2025

Well-aligned Vertically Oriented ZnO Nanorod Arrays and their Application in Inverted Small Molecule Solar Cells
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Surface Reconstruction for Efficient NiOx-Based Inverted Perovskite Solar Cells.

Nan Yan1, Yang Cao1, Zhiwen Jin2

  • 1Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China.

Advanced Materials (Deerfield Beach, Fla.)
|May 3, 2024
PubMed
Summary

This study introduces a surface reconstruction strategy to improve perovskite solar cell (PSC) efficiency by managing lead chelation molecules. This method enhances device performance and stability for next-generation solar technologies.

Keywords:
chelationdefectsinvertedperovskite solar cellsurface reconstruction

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Functional agents enhance perovskite solar cell (PSC) performance via surface engineering.
  • The intrinsic molecular characteristics influencing device performance are often overlooked.

Purpose of the Study:

  • To develop a surface reconstruction strategy for enhancing inverted PSC efficiency.
  • To mitigate adverse effects from lead chelation (LC) molecules, using Bathocuproine (BCP) as a model.

Main Methods:

  • A surface reconstruction strategy was employed using BCP as a representative LC molecule.
  • BCP molecules were dissolved and specifically captured by undercoordinated Pb2+ ions on the perovskite surface.
  • This prevented adverse n-type doping, leading to surface passivation.

Main Results:

  • The BCP molecule demonstrated a significant passivation effect on the perovskite surface.
  • This resulted in a notable increase in open-circuit voltage (VOC).
  • A record power conversion efficiency of 25.64% was achieved for NiOx-based inverted PSCs.

Conclusions:

  • The surface reconstruction strategy effectively enhances inverted PSC efficiency and stability.
  • The treated PSCs maintained over 80% of their initial efficiency after approximately 1500 hours of ambient exposure.
  • This approach offers a promising pathway for developing stable and high-performance perovskite solar cells.