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Updated: Jan 27, 2026
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Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
Published on: March 19, 2017
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Crystallization Modulation and Halide Segregation Suppression in Wide-Bandgap Perovskite for Efficient All-Perovskite
Lingui Han1, Shunan Sui1, Jiupeng Cao1
1Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, Jiangsu, China.
Small (Weinheim an Der Bergstrasse, Germany)
|January 25, 2026
Summary
Researchers developed a new method using phenylhydrazine derivatives to improve wide bandgap perovskite solar cells (PSCs). This enhances crystallization and stability, boosting efficiency for tandem solar cell applications.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Wide bandgap (WBG) perovskite solar cells (PSCs) are crucial for high-efficiency tandem solar cells.
- Challenges include inhomogeneous crystallization, non-radiative recombination, and iodide oxidation leading to instability.
Purpose of the Study:
- To develop a strategy to improve WBG PSCs by addressing crystallization and stability issues.
- To enhance the performance and operational lifetime of WBG PSCs.
Main Methods:
- Incorporation of phenylhydrazine derivatives into the WBG perovskite solution.
- Modulation of crystallization processes and inhibition of iodide oxidation.
- Fabrication of single-junction WBG PSCs and two-terminal all-perovskite tandem solar cells.
Main Results:
- Achieved high-quality WBG perovskite films with enhanced photostability.
- Single-junction WBG PSCs (1.77 eV) reached a 20.75% power conversion efficiency (PCE) with excellent operational stability.
- All-perovskite tandem solar cells achieved a 28.63% PCE.
Conclusions:
- Phenylhydrazine derivatives effectively improve WBG PSCs by controlling crystallization and preventing degradation.
- The developed WBG PSCs are suitable for high-performance all-perovskite tandem solar cells.
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