IMPROVING PEROVSKITE SOLAR MODULE STABILITY BY UNDERSTANDING AND MITIGATING SCRIBE-INDUCED CHEMO-THERMOMECHANICAL DEGRADATION A. PROJECT OBJECTIVES LASER SCRIBES ARE A VULNERABLE POINT IN METAL HALIDE PEROVSKITE (MHP) SOLAR MODULES, BUT THE DEGRADATION MECHANISM(S) UNDERPINNING THE INSTABILITY IS STILL NOT WELL UNDERSTOOD. THERE ARE REPORTS OF CHEMICAL REACTIONS OCCURRING AT THE SCRIBE LINES, PARTICULARLY AT THE P2 SCRIBE OFTEN WITH RESIDUAL PBI2 THAT CAN CATALYZE METAL-HALIDE REACTIONS WHEN A METAL IS USED. IN ADDITION, THERMAL CYCLING INDUCES SIGNIFICANT FILM STRESSES THAT LEAD TO DELAMINATION AND ACCELERATE CHEMICAL DEGRADATION BY REDUCING THE ACTIVATION ENERGY FOR ION MIGRATION NEAR THE LASER SCRIBE. HOWEVER, THE ROLE OF MECHANICAL AND CHEMICAL DEGRADATION AND THE COUPLING BETWEEN THE TWO EFFECTS NEAR THE SCRIBES IMPACTING MODULE LIFETIME REMAINS UNKNOWN. THIS PROJECT AIMS TO UNDERSTAND THE EFFECT OF THERMAL CYCLING OVER THE LASER SCRIBING AREA OF THE PEROVSKITE SOLAR MODULE AND USE AN INERT ELECTRODE TO STABILIZE THE OPERATIONAL LIFETIME OF THE MODULE.