Addressing current-voltage hysteresis in perovskite solar cells is crucial for improving their efficiency and stability. Several strategies can be employed to mitigate this issue:
Strategies to Address Hysteresis
- Perovskite Composition and Bulk Defect Engineering: Hysteresis can be influenced by the composition of perovskite materials. Bulk defect engineering is considered a promising approach to reduce hysteresis by minimizing defects within the material.
- Interfacial Engineering: Modifying interfaces between different layers (e.g., electron and hole transport layers) can significantly reduce hysteresis. This involves optimizing the interfacial properties to minimize charge accumulation and recombination.
- Doping Techniques: Doping the perovskite layer with materials like KI has been shown to be effective in reducing hysteresis, independent of the perovskite composition.
- Scan Rate and Measurement Conditions: Reducing the scan rate during current-voltage measurements can help stabilize the curves by allowing time transients to reach equilibrium. However, this approach must be balanced with the risk of long-term degradation.
- Charge Distribution Analysis: Understanding how charges distribute at interfaces using techniques like Kelvin probe force microscopy can help in designing strategies to mitigate hysteresis caused by interfacial charges.
By implementing these strategies, it is possible to minimize hysteresis in perovskite solar cells, thereby enhancing their efficiency and reliability.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/how-can-the-issue-of-current-voltage-hysteresis-in-perovskite-solar-panels-be-addressed/
