Temperature fluctuations can significantly impact the durability of perovskite-silicon tandem solar cells. Here are key points on how these fluctuations affect them:
Impact of Temperature Fluctuations
- Performance Decline: Temperature variations lead to a decline in performance of perovskite solar cells, which is a part of tandem configurations. The open-circuit voltage decreases linearly with increasing temperature, while the short-circuit current can drop significantly due to increased series resistance during temperature cycling.
- Current Mismatch: In tandem cells, temperature affects the bandgap of the perovskite sub-cell, leading to current mismatch between the sub-cells. This mismatch can reduce the overall efficiency of the tandem cell.
- Stability and Durability: Perovskite components in tandem cells are more prone to degradation under temperature fluctuations. Effective encapsulation is crucial to maintain stability over time, especially in outdoor conditions where temperature, humidity, and irradiance vary.
- Recovery and Degradation: Performance degradation caused by temperature fluctuations can be reversible if the cells are maintained under constant illumination at open circuit for several hours. However, repeated exposure to fluctuating temperatures can lead to long-term degradation.
Strategies for Improvement
- Bandgap Tuning: Adjusting the bandgap of the perovskite sub-cell can help mitigate the effects of temperature-induced current mismatch, improving overall efficiency under varying conditions.
- Encapsulation: Enhancing encapsulation methods can protect the perovskite layer from environmental stressors, ensuring better durability in outdoor conditions.
- Stability Tests: Conducting thorough outdoor stability tests under combined stressors like temperature, humidity, and solar radiation is essential for predicting the lifespan of these cells.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/how-do-temperature-fluctuations-specifically-impact-the-durability-of-perovskite-silicon-tandem-solar-cells/
