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Self-Assembled Monolayer Modified MoO3/Au/MoO3 Multilayer Anodes for High Performance OLEDs
정대균,Chefwi Lim,김명기,정경훈,김재헌,김지영,박진구,민경식,이재갑 대한금속·재료학회 2017 ELECTRONIC MATERIALS LETTERS Vol.13 No.1
We control the work function and the surface energy of the MoO3/Au/MoO3 (MAM) anode of OLEDs by modifying the top MoO3 layer viavapor phase deposition. The performance and stability of the device aresignificantly altered depending on the dipole direction of the selfassembledmonolayer (SAM) with permanent dipole moment insertedbetween N,N'-Bis(naphthalen-1-yl)-N,N'-bis(phenyl)benzidine (NPB)film and a MAM anode as well as on the interfacial wetting between theSAM and NPB layer. A CF3-terminated monolayer on a MAM electrodeimproved the performance and stability of the OLEDs relative to areference device with only a MAM electrode, demonstrating that coatingwith SAMs via vapor phase deposition is an effective method to engineerthe interface of MAM electrode optoelectronic devices.