‘Eternal Jewel Solar Power’ (永珈光能) is the latest Chinese perovskite company to complete seed round financing, courtesy of exclusive backer Linear Capital, and it has mentioned achieving 26% efficiency for single-junction perovskite and 27% for an all-perovskite tandem, combined with a 6,000-hour continued illumination lifespan. None of those numbers are especially remarkable, and nor is yet another perovskite startup raising a few million dollars to fund R&D efforts. The interesting part is the all-perovskite tandem mention. The is not the first time we have seen this technology mentioned by a Chinese startup. Of course, both the West and China have also published many academic works on the topic, even if we have yet to notice a Western startup pursuing this…