Related Experiment Video
Updated: Jan 12, 2026
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Omnidirectional Multi-Type Defect Passivation Enables Efficient and Stable Perovskite Solar Cells via Dual Organic
Chuangping Liu1,2, Xuequan Yang1, Haiting Tan1
1Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, P. R. China.
This study introduces a novel defect passivation strategy for perovskite solar cells using organic potassium salts. This method enhances efficiency and stability by addressing defects in the bulk, surfaces, and interfaces.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Defect states in perovskite solar cells hinder efficiency and long-term stability.
- Passivation strategies are crucial for overcoming these limitations.
Purpose of the Study:
- To develop an omnidirectional, multi-type defect passivation strategy for perovskite solar cells.
- To improve the power conversion efficiency (PCE) and operational stability of these devices.
Main Methods:
- Introduced two organic potassium salts: potassium 4-formylphenyltrifluoroborate and potassium propylxanthate.
- Applied these salts to the perovskite precursor and interfacial layer for comprehensive defect passivation.
- Investigated the mechanism of defect stabilization via hydrogen bonding and Lewis base interactions, and ion migration suppression.
Main Results:
- Achieved a high PCE of 25.78% with negligible hysteresis and reduced open-circuit voltage loss (≈349 mV).
- Demonstrated excellent stability, retaining 88.7% PCE after 1100 hours at 85°C and 86.8% after 1400 hours at 40% relative humidity.
- Successfully passivated defects in the bulk, surfaces, and interfaces, mitigating non-radiative recombination.
Conclusions:
- The proposed omnidirectional defect passivation strategy significantly enhances perovskite solar cell performance and stability.
- Organic potassium salts offer a promising approach for stabilizing perovskite materials against thermal and humidity stress.
