First Solar, Inc.

The Principal Project Goal Is the Demonstration of a High-performing 4-TERMINAL FAPBI3-PEROVSKITE/CI(G)S Tandem Module of at Least 27% Efficiency, Passing the Outlined Durability Specifications Based on the Iec 61215 Module Quality Test (MQT) 10, 11, 13 and ISOS-L-2, Demonstrating at Least 26% Power Conversion Efficiency (PCE) After 6 Months of Outdoor Testing, and Demonstrating Perovskite Top-modules at Pce = 20.5% With an Aperture Area Exceeding 500 CM2 That Pass MQT 21 and ISOS-L-2 Testing. the Project Will Be Carried Out Among Three Internal First Solar R&D Sites as Well as Two Leading Academic Partners in Perovskite Development and Characterization. the Goals and the Timeline of the Seto Project Align Well With First Solar’s Internal Plan. With a Combined Emphasis on Efficiency, Reliability, and Scaling Up, This Seto Program Poses Tremendous Technical Challenges, But If Successful, Will Provide a Pathway for a Commercially Viable, Beyond 25% Pce, Thin-film Only PV Technology.