Abstract
Tris-(8-hydroxyquinoline)-aluminum (Alq3)–based organic light-emitting
diodes with Co electrode are fabricated. The positive magnetic electroluminescence (MEL)
and magnetic conductance (MC) are observed in the samples, reaching 4.35% and 1.67%
under the field of 42 mT at 50 K, respectively, and the MEL and MC traces can be fitted
to non-Lorentzian line shapes. The MEL varies as a function of the Co thickness and
reaches the optimal value at 10 nm. The MEL and MC dependence on voltage and temperature
is also investigated. The electron-hole pair model and the spin-polarized injection
mechanism are used to understand the experimental results.
© 2016 Chinese Laser Press
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