All-vacuum-deposited inorganic cesium lead halide perovskite light-emitting diodes
Sihan Xie, Anna Osherov, Vladimir Bulović
Abstract
Polycrystalline CsPbBr3 thin films are deposited by vacuum co-evaporation of cesium halide and lead halide precursors, leading to uniform pinhole-free morphology and precise control over the film thickness and precursor stoichiometry. By utilizing the organic hole and electron transport layers, all-vacuum-deposited perovskite LEDs are fabricated. The resulting devices exhibit a maximum luminance of 1800 cd/m2, a 531 nm emission wavelength peak with a spectral linewidth of 21 nm, and an external quantum efficiency of 1.1%.
Topics & Concepts
HalidePerovskite (structure)Materials scienceOptoelectronicsLight-emitting diodeQuantum efficiencyVacuum evaporationThin filmDiodeStoichiometryVacuum depositionCrystalliteOpticsInorganic chemistryChemistryNanotechnologyCrystallographyMetallurgyOrganic chemistryPhysicsPerovskite Materials and ApplicationsOrganic Light-Emitting Diodes ResearchQuantum Dots Synthesis And Properties