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Updated: Jan 28, 2026
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Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
Published on: March 19, 2017
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Stress-Regulated Crystallization on Mesoporous Nickel Oxide Enables High-Efficiency and Stable Inverted Perovskite
Jiaqi Wang1, Zhirui Chen1, Haojie You2,3
1Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, P. R. China.
The Journal of Physical Chemistry Letters
|January 27, 2026
Summary
Mesoporous nickel oxide (mNiOx) hole transport layers significantly boost inverted perovskite solar cell performance. This novel mNiOx approach enhances device efficiency and stability by optimizing perovskite crystallization and interfaces.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Nickel oxide (NiOx) is a key hole transport layer (HTL) in perovskite solar cells (PSCs).
- Previous research focused mainly on planar NiOx films, limiting performance gains.
- Enhancing NiOx optoelectronic properties is crucial for efficient PSCs.
Purpose of the Study:
- To develop a novel mesoporous nickel oxide (mNiOx) hole transport layer for inverted PSCs.
- To investigate the impact of mNiOx on perovskite crystallization and device performance.
- To improve the power conversion efficiency (PCE) and operational stability of PSCs.
Main Methods:
- Fabrication of mNiOx HTL via high-temperature calcination using nickel nitrate hexahydrate.
- Utilized Pluronic P123 and polyvinylpyrrolidone as structure-directing templates.
- Characterization of mNiOx film properties and its effect on perovskite layer formation.
Main Results:
- The mNiOx framework modulated perovskite crystallization, improved interface contact, and enhanced crystal quality.
- Reduced defect density and shifted interfacial stress from tensile to compressive were observed.
- Achieved a power conversion efficiency (PCE) of 23.19% with significantly improved open-circuit voltage (VOC) and fill factor (FF).
Conclusions:
- Mesoporous NiOx HTLs offer superior performance compared to planar counterparts in inverted PSCs.
- The mNiOx strategy leads to enhanced device efficiency and stability.
- This approach presents a promising pathway for scalable fabrication of high-performance perovskite solar cells.
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