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Updated: Jun 12, 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

Hard Lewis Base-Driven Crystallization Control for Efficient All-Perovskite Tandem Solar Cells.

Yuqi Bao^1,2, Jie Zeng^1,3, Xia Lei¹

¹Department of Materials Science and Engineering, and Shenzhen Engineering Research and Development Center for Flexible Solar Cells, Southern University of Science and Technology, Shenzhen, China.

Advanced Materials (Deerfield Beach, Fla.)

|June 11, 2026

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4-Methylpyridine-Mediated Homogenization of Wide-Bandgap Perovskite Films for Efficient All-Perovskite Tandem Solar Cells.

Advanced materials (Deerfield Beach, Fla.)·2026

This summary is machine-generated.

Researchers developed a Lewis hard-basicity strategy to improve tin-lead perovskite solar cells (PSCs). This enhanced defect passivation and crystallization, boosting single-junction PSC efficiency to 23.71% and all-perovskite tandem PSCs to 29.44% with improved stability.

Area of Science:

Materials Science
Renewable Energy
Photovoltaics

Background:

All-perovskite tandem solar cells (APTSCs) offer higher theoretical efficiencies and broader spectral coverage.
Tin-lead (Sn-Pb) hybrid perovskite solar cells (PSCs), used as the bottom cell in APTSCs, suffer from high defect density and poor crystallization, limiting performance and stability.

Purpose of the Study:

To address the challenges in Sn-Pb PSCs by developing a novel strategy for defect passivation and crystallization control.
To enhance the performance and long-term stability of both single-junction Sn-Pb PSCs and APTSCs.

Main Methods:

A Lewis hard-basicity amplification strategy was employed to create additional hard-acid binding sites.
This strategy promotes coordination with Sn²⁺ ions, facilitating defect passivation and regulating crystallization morphology.

Keywords:

Sn‐Pb perovskite solar cells all‐perovskite tandem solar cells crystallization control lewis hard‐basicity amplification

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Last Updated: Jun 12, 2026

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The strategy was applied to single-junction Sn-Pb PSCs and subsequently integrated into APTSCs with wide-bandgap perovskites.

Main Results:

Single-junction Sn-Pb PSCs achieved a champion power conversion efficiency (PCE) of 23.71%.
All-perovskite tandem solar cells (APTSCs) fabricated with these Sn-Pb PSCs reached a champion PCE of 29.44%.
Both device types demonstrated remarkable stability, retaining approximately 80% of their initial efficiency after 1080 hours of continuous one-sun illumination.

Conclusions:

The Lewis hard-basicity amplification strategy is effective for defect passivation and crystallization control in Sn-Pb PSCs.
This approach significantly enhances the PCE of both single-junction and tandem perovskite solar cells.
The improved devices exhibit promising long-term operational stability, paving the way for practical applications.