Enhancement of iridium-based organic light-emitting diodes by spatial doping of the hole transport layer

Wang, Ying (author)

Gao, Weiying (author)

Braun, Slawomir, 1977- (author): Linköpings universitet,Tekniska högskolan,Ytors Fysik och Kemi

Salaneck, William R, 1941- (author): Linköpings universitet,Tekniska högskolan,Ytors Fysik och Kemi

Fabrice, Amy (author)

Calvin, Chan (author)

Kahn, Antoine (author)

(creator_code:org_t)

AIP Publishing, 2005
2005
English.
In: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 87:19, s. 193501-

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

The electroluminescence efficiency of Ir-based green emitter devices is very sensitive to the nature of the hole transport layer used. We show that by inserting a 1 nm layer of bis[4-(N,N-diethylamino)-2-methylphenyl](4- methylphenyl)methane (MPMP) in a 4, 4′ - bis- (carbazol-9-yl) biphenyl (CBP) hole transport layer, a device that combines the positive attributes of both MPMP (high efficiency) and CBP (low injection voltage) is obtained. These results can be understood based on a combined ultraviolet photoemission spectroscopy/inverse photoemission spectroscopy study, which reveals the very low electron affinity and superior electron blocking capability of MPMP. © 2005 American Institute of Physics.

By the author/editor: Wang, Ying; Gao, Weiying; Braun, Slawomir, ...; Salaneck, Willia ...; Fabrice, Amy; Calvin, Chan; show more...; Kahn, Antoine; show less...

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