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Perovskite light‐emitting diodes (PeLEDs) emerge as a promising class of optoelectronic devices for next‐generation displays and lighting technology. However, the performance of blue PeLEDs lags far behind that of their green and red counterparts, including the unachieved trade‐off between high efficiency and high luminance, severe efficiency roll‐off, and unsatisfactory power efficiency. Here, a...
The Pikwitonei Granulite Domain (PGD), located in the northwestern Superior Province, is one of the largest Neoarchean high‐grade metamorphic domains in the world, and is a key to understanding the Neoarchean crustal evolution of the Superior Province. Here we report results of a study on ultrahigh temperature (UHT) granulites with a sapphirine + quartz‐bearing peak assemblage from the Sipiwesk Lake...