South Korea headquartered Qcells, has announced its tandem modules have passed stress tests as per both IEC and UL certification standards. The tests include the UV preconditioning test for 15kWh/m2 (MQT10; UV15), thermal cycling test for 200 cycles (MQT11; TC200), humidity-freeze test for 10 cycles (MQT12; HF10) and damp heat test for 1000h (MQT13; DH1000).All these tests met tandem-specific power measurement requirements under IEC TS 60904-1-1 for multi-junction modes. The modules feature a 2-terminal device architecture, which is composed of a perovskite technology top layer and silicon bottom layer featuring Qcells’ proprietary Q.ANTUM technology. The tested modules were fabricated on full-area M10 substrates usingQcells’ tandem R&D pilot line in Bitterfeld-Wolfen, Germany. The project received funding support from BMWK, Saxony-Anhalt, the EU and Korean government programs through the Pangyo R&D center and the PEPPERONI initiative.