All-solution-processed perovskite light-emitting diodes with all metal oxide transport layersElectronic supplementary information (ESI) available. See DOI: 10.1039/c8cc07821a

All-solution-processed perovskite light-emitting diodes (PeLEDs) with all metal oxide transport layers were successfully realized based on an ITO/NiO x /CsPbBr 3 /ZnMgO/Al conventional device structure. A unique perovskite-polymer composite method enables the deposition of solution-processed ZnMgO nanoparticles on the perovskite film. As a result, we achieved highly efficient PeLEDs with a maximum luminance of 17 017 cd m −2 , and the efficiency showed little roll-off with increasing current density. Stable all-solution-processed perovskite light-emitting diodes with all metal oxide transport layers were successfully realized based on an ITO/NiO x /CsPbBr 3 /ZnMgO/Al conventional device structure.