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P-N junction

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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Related Experiment Video

Updated: Jan 16, 2026

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

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

Published on: February 27, 2017

Strain regulation by interface engineering in perovskite solar cells.

Yang Ding^1,2, Hengyue Li^1,2, Jianhui Chang^1,3

¹Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics, Central South University, Changsha 410083, People's Republic of China.

Reports on Progress in Physics. Physical Society (Great Britain)

|September 26, 2025

Summary

Interface engineering enhances perovskite solar cell (PSC) stability by reducing strain-induced degradation. This strategy improves device performance and longevity, addressing a key challenge in PSC technology.

Keywords:

interface engineering perovskite solar cells stability strain regulation

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Area of Science:

Materials Science
Renewable Energy
Photovoltaics

Background:

Perovskite solar cells (PSCs) offer high efficiency and low cost.
Long-term operational stability is limited by strain-induced degradation in the perovskite layer.
Strain causes defects, accelerates ion migration, and shortens device lifespan.

Purpose of the Study:

To provide a comprehensive overview of interface engineering for strain regulation in PSCs.
To discuss the role of interface design in enhancing PSC stability and performance.
To offer insights into future strategies for improving PSCs.

Main Methods:

Review of recent advances in interface engineering approaches for strain regulation.
Analysis of how interface design impacts crystallinity and defect density.
Discussion of strategies to relieve residual strain in perovskite films.

Main Results:

Interface engineering is a key strategy for regulating strain and enhancing PSC stability.
Effective strain regulation improves perovskite film crystallinity and reduces defect density.
Optimized interface design leads to improved long-term performance and operational lifespan.

Conclusions:

Interface engineering is crucial for mitigating strain-induced degradation in PSCs.
Strain regulation via interface design enhances device efficiency and stability.
Further research into interface strategies can unlock the full potential of perovskite photovoltaics.