摘要
Metal halide perovskite light-emitting diodes(PeLEDs)show great potential in ultra-high-definition displays,due to their narrowband emission,wide color gamut(~140%),and cost-effective solution processability[1].Thanks to scientists'tremendous efforts,the external quantum efficiencies(EQEs)for the state-of-the-art PeLEDs emitting near-infrared and green light have reached 21.6%[2]and 23.4%[3],respectively.However,blue PeLEDs,as one of the essential technologies for perovskite-based high-resolution monitors and white light-ing,are still inferior to their red and green counterparts.
基金
J.Tian thanks the National Key Research and Development Program of China(2017YFE0119700)
National Natural Science Foundation of China(51961135107,51774034,51772026)
Beijing Natural Science Foundation(2182039)
L.Ding thanks the National Key Research and Development Program of China(2017YFA0206600)
the National Natural Science Foundation of China(51773045,21772030,51922032 and 21961160720)for financial support.