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Efficient electron injection in organic light-emitting diodes using lithium quinolate/Ca/Al cathodes

Authors
Journal
Applied Physics Letters
0003-6951
Publisher
American Institute of Physics
Publication Date
Disciplines
  • Physics

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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