Journal
CHEMISTRY OF MATERIALS
Volume 19, Issue 9, Pages 2288-2291Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm062105s
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We studied photoluminescence (PL) behavior of tris(8-hydroxyquinoline) aluminum based organic light-emitting devices doped with various fluorescent dyes, under electron currents. The results show that electron currents reduce the PL quantum yield by as much as 50%, depending on the electron density and the doping conditions in the emitter layer. The decrease in luminescence under electron current indicates electron-exciton interaction, which likely plays a role in limiting the efficiency of organic electroluminescent devices.
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