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Irradiance and Temperature Test Method for Light and Elevated Temperature Induced Degradation and Regeneration on Commercial PERC Modules
E. Garcia Goma, M. Passaro, S. Roest, C. Chan, A. Ciesla
Photovoltaic Modules and BoS Components
Subtopic: PV Module Design, Manufacture, Performance and Reliability
Event: 35th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5DO.9.4
ISBN: 3-936338-50-7
0,00 EUR
Document(s): presentation


As an indirect result of COP21, attractiveness of PV and LCOE of PV being lower than coal; fast growing installation regions have shifted from temperate zones (Europe, North America) to more hot and/or humid areas. The higher irradiances in these regions (South East Asia, Africa, Latin America & Middle East)have an accelerated effect on degradation effects, such as LID. Both mono and poly PERC (more so) cell technologies suffer to a greater degree from LID than traditional Back Surface Field (BSF) cells as according to Fraunhofer CSP and UNSW [1][2]. LID in PERC typically forms due to one of the four contaminants (dangling bonds, Fe, Cu, B) forming complexes which in turn cause trap states [1]. Additionally, UNSW argues that there be a yet to be documented type 2 defect in poly PERC which is only activated when dark annealed or present over a longer duration of time as secondary LID defect.