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Updated: Jun 3, 2025
Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
Multifunctional Organic Molecule for Defect Passivation of Perovskite for High-Performance Indoor Solar Cells
Chenqing Tian1, Dongxue Liu2, Yixin Dong2
1Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119, China.
Researchers developed sodium sulfanilate (4-ABS) to improve perovskite solar cells (PSCs). This additive passivates defects and enhances crystallization, boosting efficiency under both standard and low-light conditions for sustainable energy.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) offer potential for sustainable energy by utilizing indoor light.
- Solution-processed PSCs face challenges with defects, limiting low-light efficiency and stability.
Purpose of the Study:
- To design an additive for defect passivation and improved crystallization in PSCs.
- To enhance the efficiency and stability of PSCs, particularly under low-light conditions.
Main Methods:
- Synthesized a multifunctional organometallic salt, sodium sulfanilate (4-ABS).
- Utilized 4-ABS to passivate positively-charged defects (Pb ions, iodine vacancies) in perovskite films.
- Investigated the effect of 4-ABS on perovskite crystallization kinetics and film morphology.
- Evaluated device performance under standard and weak light (1000 lux).
Main Results:
- 4-ABS effectively passivated defects and regulated perovskite crystallization, leading to larger crystal sizes and reduced grain boundaries.
- Synergistic effects of trap suppression and crystallization modulation improved low-light performance.
- Optimized PSCs showed increased power conversion efficiency from 22.48% to 24.34% under standard conditions.
- Achieved a high efficiency of 41.11% under 1000 lux weak light.
Conclusions:
- Sodium sulfanilate (4-ABS) is an effective strategy for defect modulation in PSCs.
- The additive enhances both standard and weak light performance by reducing energy loss and ionic migration.
- This research offers a pathway to boost PSC efficiency for diverse lighting environments.
