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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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Updated: May 1, 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

Synergistic Bimolecular Engineering Enables Homogeneous and Multifunctional Surfaces for High-Performance Inverted

Zhixu Zhou¹, Yue Zang¹, Yibo Tu¹

¹Institute of Carbon Neutrality and New Energy, School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, China.

Small (Weinheim an Der Bergstrasse, Germany)

|April 11, 2026

Summary

Synergistic bimolecular engineering using choline chloride and phenethylammonium iodide enhances perovskite solar cell performance by improving defect passivation and charge transport. This novel method boosts efficiency and operational stability in perovskite solar cells (PSCs).

Keywords:

1D perovskite hydrogen bonding interface engineering ion exchange perovskite solar cells

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Last Updated: May 1, 2026

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

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Published on: February 27, 2017

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

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Flash Infrared Annealing for Perovskite Solar Cell Processing

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Area of Science:

Materials Science
Photovoltaics
Chemical Engineering

Background:

Low-dimensional perovskite layers are key for high-performance perovskite solar cells (PSCs).
Conventional surface passivation strategies face trade-offs between defect passivation and charge transport.

Purpose of the Study:

To introduce a synergistic bimolecular engineering (SBE) method for precise control of surface perovskite phase formation.
To overcome the limitations of conventional passivation techniques in PSCs.

Main Methods:

Developed an SBE method using choline chloride (ChCl) and phenethylammonium iodide (PEAI).
Utilized hydrogen bonding between ChCl and PEAI to promote uniform 1D perovskite layer formation.
Applied the SBE method for multifunctional interface optimization in inverted PSCs.

Main Results:

Achieved simultaneous enhancement of defect passivation and charge carrier mobility.
Improved open-circuit voltage and fill factor in PSCs.
Demonstrated a champion power conversion efficiency of 25.24% for inverted PSCs, significantly outperforming control devices (21.08%).

Conclusions:

The SBE strategy offers a general molecular design principle for advanced interface engineering in high-efficiency photovoltaics.
This method effectively decouples passivation from transport limitations, leading to superior PSC performance and stability.