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Updated: Jul 9, 2025
11:38
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
18.5K
Buried Interface Optimization for Flexible Perovskite Solar Cells with High Efficiency and Mechanical Stability
Dengjie Zhao1,2, Chenxi Zhang1,2, Jingkun Ren1,2
1College of Electronic Information and Optical Engineering, Key Lab of Advanced Transducers and Intelligent Control System, Taiyuan University of Technology, Taiyuan, 030024, China.
Small (Weinheim an Der Bergstrasse, Germany)
|December 6, 2023
Summary
Phytic acid (PA) incorporated into tin oxide (SnO2) electron transport layers significantly boosts perovskite solar cell (PSC) efficiency and stability by reducing defects and strain. This strategy enhances both flexible and rigid PSC performance and durability.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Perovskite solar cells (PSCs) suffer from reduced efficiency and stability due to defect-induced recombination and residual strain.
- Flexible PSCs (f-PSCs) are particularly susceptible to performance degradation from mechanical stress.
Purpose of the Study:
- To develop a strategy for enhancing PSC efficiency and stability by addressing defect-induced recombination and residual strain.
- To investigate the effect of incorporating phytic acid (PA) into SnO2 electron transport layers (ETLs) for improved PSC performance.
Main Methods:
- Incorporation of phytic acid (PA) into SnO2 to create a modified electron transport layer (ETL).
- Passivation of Sn dangling bonds and enhancement of SnO2 conductivity and electron mobility.
- Improvement of perovskite crystallization quality and reduction of interface/bulk defects.
- Mitigation of residual strain in perovskite films and optimization of energy level alignment.
Main Results:
- The SnO2-PA ETL passivates defects, enhances charge transport, and improves perovskite film quality.
- Optimized flexible PSCs (f-PSCs) achieved a champion power conversion efficiency (PCE) of 21.08%, and rigid PSCs reached 21.82%.
- Optimized f-PSCs retained 80% of their initial PCE after 5000 bending cycles, demonstrating superior mechanical durability compared to control devices (49% retention).
Conclusions:
- Phytic acid incorporation into SnO2 ETLs is an effective strategy for enhancing both the efficiency and stability of perovskite solar cells.
- The developed method significantly reduces defects and strain, leading to improved device performance and long-term operational stability, especially for flexible applications.
