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Updated: Apr 22, 2026
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Halogen-Functional Molecules for Synergistic Multi-Defect Healing in High-Performance Perovskite Solar Cells
Weicun Chu1, Cheng Wang1, Zeliang Wei1
1State Key Laboratory of Mechanics and Control for Aerospace Structures, Institute For Frontier Science, Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, China.
Two additives, perfluoropinacol (PFP) and 2,6-dichlorobenzyl chloride (DCB), synergistically passivate perovskite defects and control crystallization. This approach yields high-efficiency, stable perovskite solar cells for industrial applications.
Area of Science:
- Materials Science
- Solid State Chemistry
- Photovoltaics
Background:
- Perovskite solar cells face challenges from complex defects and lattice damage during passivation.
- Existing passivation methods often use harsh agents, limiting effectiveness and causing damage.
Purpose of the Study:
- To develop a synergistic strategy for multiple defect passivation in perovskites.
- To promote controlled crystallization alongside defect suppression.
- To enhance the efficiency and stability of perovskite solar cells.
Main Methods:
- Introduction of two additives: perfluoropinacol (PFP) and 2,6-dichlorobenzyl chloride (DCB).
- Utilizing additives with multiple functional sites to target various defect species (e.g., VI, VPb, PbI).
- Investigating the cooperative effect of PFP and DCB on defect passivation and crystal growth.
Main Results:
- Achieved comprehensive defect passivation by targeting distinct defect types synergistically.
- Demonstrated controlled crystallization, leading to high-performance devices with champion power conversion efficiencies (PCEs) of 25.47% (n-i-p) and 26.47% (p-i-n).
- Exhibited durable stability in unencapsulated devices, retaining 95% efficiency after 1300 hours at 65°C and 94% after 1000 hours under MPPT.
Conclusions:
- The cooperative strategy effectively regulates crystallization and suppresses deep/shallow defects.
- This approach offers a practical pathway for developing efficient and stable perovskite photovoltaics.
- Advances the industrial deployment of perovskite solar cell technology.
