In:
Applied Physics Letters, AIP Publishing, Vol. 101, No. 14 ( 2012-10-01)
Abstract:
We investigated alkali metal doping mechanism by comparative analysis between an Mg-Alq3 co-deposition (Mg:Alq3) and an Mg deposition on Alq3 films (Mg/Alq3). The operating voltage decreased by 0.4 V and the luminance increased by 60 cd/m2 at 11 mA/cm2 for devices constructed from the Mg:Alq3. However, the device characteristics of Mg/Alq3 samples were degraded. Our experimental results using an in-situ photoemission study showed that alkali metal doping in Alq3 did not induce band bending, but reduce electron injection barrier by charge transfer from alkali metals to Alq3 molecules.
Type of Medium:
Online Resource
ISSN:
0003-6951
,
1077-3118
Language:
English
Publisher:
AIP Publishing
Publication Date:
2012
detail.hit.zdb_id:
211245-0
detail.hit.zdb_id:
1469436-0
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