Behaviour of Generation Performance Degradation Process in Flexible Solar Cell Load using under Fatigue AE and LT Technique

Abstract

In the present study, in order to understand the mechanism of electrical degradation of flexible solar cell under cyclic loading, cyclic tensile tests were performed with the maximum strains of 0.8% and 1.2%. Microdamages initiation and accumulation were detected by the acoustic emission (AE) techniques. The electrical degradation of solar cell was evaluated by monitoring electrical power calculated from I-V curve. Furthermore, microdamages contributing to the electrical degradation were identified by the lock-in thermography (LT). Consequently, it was demonstrated that microdamage can be monitored by AE technique and the contribution of microdamages can be characterized by LT technique.