Abstract
Device performances of green devices with cathode structure of lithium quinolate (Liq)∕Ca∕Al were investigated and electron injection mechanism was studied using ultraviolet photoelectron spectroscopy. Power efficiency could be improved by 70% by using Liq∕Ca∕Al cathode structure due to efficient electron injection, and interfacial energy barrier lowering by Liq∕Ca∕Al metal cathode was observed.
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