Study of potential induced degradation mechanism in commercial PV module

This paper focuses on the study of potential induced degradation effect (PID) under 25°C, 100% RH and Na⁺ rich water and to indentify PID mechanism with 1000V bias applied to active layer. According to our Current-voltage measurements and electroluminescence results showed the module power loss 5% due to negative bias applied then after positive bias the power recovery and no corrosion like Ag → Ag⁺ + e^- exists. In our case that means Na⁺ ion causing polarization effect.