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Related Concept Videos

P-N junction01:11

P-N junction

540
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...
540

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Related Experiment Video

Updated: Jul 9, 2025

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

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Understanding the Heterointerfaces in Perovskite Solar Cells via Hole Selective Layer Surface Functionalization.

Bidisha Nath1, Sushant K Behera2, Jeykishan Kumar1

  • 1Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bengaluru, Karnataka, 560012, India.

Advanced Materials (Deerfield Beach, Fla.)
|November 29, 2023
PubMed
Summary
This summary is machine-generated.

Surface passivation of nickel oxide (NiOₓ) in perovskite solar cells (PSCs) using octadecylphosphonic acid (ODPA) significantly enhances charge transport and boosts power conversion efficiency by 13%. This method creates stable, high-performance PSCs.

Keywords:
electroluminescence and photoluminescenceinterface Engineeringinterfacial defectsself-assembly monolayers

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Nanotechnology

Background:

  • Interfaces in perovskite solar cells (PSCs) critically impact device performance through charge transport and recombination dynamics.
  • Oxide-based transport layers in PSCs often suffer from defects, hindering optimal charge carrier management and overall efficiency.
  • Surface passivation is crucial for mitigating these defects and improving the stability and performance of PSCs.

Purpose of the Study:

  • To investigate the effectiveness of octadecylphosphonic acid (ODPA) for passivating the NiOₓ interface in PSCs.
  • To enhance charge transport and reduce recombination at the hole transport layer (HTL)/perovskite interface.
  • To achieve high-power conversion efficiency and hysteresis-free operation in PSC devices.

Main Methods:

  • Surface passivation of NiOₓ using octadecylphosphonic acid (ODPA) as a self-assembly monolayer.
  • Fabrication of PSC devices incorporating the ODPA-treated NiOₓ layer.
  • Characterization of device performance, including power conversion efficiency and hysteresis analysis.
  • Computational studies to explore the ODPA-treated HTL/Perovskite architecture.

Main Results:

  • ODPA passivation significantly improved charge transport across the NiOₓ/perovskite interface.
  • Achieved hysteresis-free PSC devices with an approximate 13% increase in power conversion efficiency.
  • Demonstrated enhanced charge exchange capacity and reduced mid-gap energy states, leading to higher photogenerated carrier density.

Conclusions:

  • ODPA surface functionalization is a viable strategy for enhancing the performance of NiOₓ-based PSCs.
  • The findings support the broader application of phosphonic acid-based self-assembly monolayers for passivating oxide transport layers in PSCs.
  • This research contributes to the development of highly efficient and stable halide perovskite solar cells.