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Star-configured carbazole as an efficient near-ultraviolet emitter and hole-transporting material for organic light-emitting devices
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Image of FIG. 1.

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FIG. 1.

Chemical structure of MTPC-Me and schematic energy diagrams of organic materials used in this work (HOMO, ; LUMO, for NPB).

Image of FIG. 2.

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FIG. 2.

Chemical structure and crystal structure of MTPC-Et.

Image of FIG. 3.

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FIG. 3.

Absorption (dash line, in ) and PL emission (dot line, in ; solid line, thin film) spectra of MTPC-Me.

Image of FIG. 4.

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FIG. 4.

EL spectrum of device A (top) and external quantum efficiency, current density, and brightness curves (inset) of devices A and B (bottom) vs the applied voltage.

Image of FIG. 5.

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FIG. 5.

EL spectrum (top) and external quantum efficiency, current density, and brightness (inset) of device C (bottom) vs the applied voltage.

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/content/aip/journal/apl/92/7/10.1063/1.2841063
2008-02-20
2014-04-24

Abstract

A novel organic material, 9-methyl-1,3,6,8-tetraphenyl-carbazole (MTPC-Me), for use in organic electroluminescent devices has been developed. This star-configured carbazole gives a strong near-ultraviolet (n-UV) emission with a high emission quantum efficiency of 47% and a narrow full width half maximum of . Two types of high-performance organic light-emitting devices were obtained using MTPC-Me as a n-UV emitter and hole-transporting material with maximum external quantum efficiency,brightness, and turn-on voltage of 1.2%, , and for the former and 1.1%, , and for the latter, respectively.

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Scitation: Star-configured carbazole as an efficient near-ultraviolet emitter and hole-transporting material for organic light-emitting devices
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/7/10.1063/1.2841063
10.1063/1.2841063
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