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

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Published on: February 27, 2017

Single-Molecule Triad: 6-MCA Additive Synchronizes Defect Passivation, Morphology Control, and Moisture Blockade for

Xusheng Zhao¹, Jialing Yi¹, Chuanchuan Chen¹

¹School of Physics and Electronic Science, Zunyi Normal College, Zunyi 563002, P. R. China.

ACS Applied Materials & Interfaces

|June 12, 2026

Summary

A novel additive, 6-maleimidocaproic acid (6-MCA), effectively enhances perovskite solar cell performance by passivating defects and improving film quality. This leads to a significant increase in power conversion efficiency and enhanced device stability.

Keywords:

defect passivation moisture resistance morphology optimization multifunctional additive perovskite solar cells

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Published on: January 10, 2017

Area of Science:

Materials Science
Renewable Energy
Photovoltaics

Background:

Perovskite solar cells face limitations from defects, humidity, and poor crystallization.
Additive engineering offers a solution, but a single additive addressing all issues is challenging.

Purpose of the Study:

To develop a simple and efficient additive for perovskite solar cells.
To improve perovskite film quality, stability, and power conversion efficiency (PCE).

Main Methods:

Incorporation of 6-maleimidocaproic acid (6-MCA) into perovskite precursor solutions.
Characterization of perovskite film morphology, crystallinity, and defect passivation.
Fabrication and testing of perovskite solar cell devices.

Main Results:

6-MCA passivates defects by coordinating with Pb2+ ions.
It enhances perovskite crystallization, improving film morphology (reduced pinholes, increased grain size, lower roughness).
The additive improves moisture resistance and device stability (light, thermal, environmental).

Conclusions:

6-MCA effectively addresses critical limitations in perovskite photovoltaics.
Devices with 6-MCA achieved a champion PCE of 23.74%, significantly higher than the control (20.38%).
The additive enhances open-circuit voltage, reduces hysteresis, and improves overall device durability.