Highly efficient, single-layer organic light-emitting devices based on a graded-composition emissive layer

Nicholas C. Erickson; Russell J. Holmes

doi:10.1063/1.3481426

Highly efficient, single-layer organic light-emitting devices based on a graded-composition emissive layer

Nicholas C. Erickson, Russell J. Holmes

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

67 Scopus citations

Abstract

We demonstrate highly efficient electrophosphorescence from devices comprising a single organic layer. High efficiency is realized by combining both hole- and electron-transporting host materials (HTMs and ETMs, respectively) into a single, graded-composition emissive layer with the green phosphorescent emitter fac-tris(2-phenylpyridine) iridium (III). The composition is continuously graded to realize nearly 100% HTM at the anode and nearly 100% ETM at the cathode. Peak external quantum and power efficiencies of ηEQE = (19.3±0.4) % and ηP = (66.5±1.3) lm/W are realized at a luminance level of 600 cd/ m².

Original language	English (US)
Article number	083308
Journal	Applied Physics Letters
Volume	97
Issue number	8
DOIs	https://doi.org/10.1063/1.3481426
State	Published - Aug 23 2010

Bibliographical note

Funding Information:
This work was supported in part by the NSF MRSEC Program under Award Number DMR-0819885. RJH would also like to acknowledge support from 3M through a Non-Tenured Faculty Grant.

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title = "Highly efficient, single-layer organic light-emitting devices based on a graded-composition emissive layer",

abstract = "We demonstrate highly efficient electrophosphorescence from devices comprising a single organic layer. High efficiency is realized by combining both hole- and electron-transporting host materials (HTMs and ETMs, respectively) into a single, graded-composition emissive layer with the green phosphorescent emitter fac-tris(2-phenylpyridine) iridium (III). The composition is continuously graded to realize nearly 100\% HTM at the anode and nearly 100\% ETM at the cathode. Peak external quantum and power efficiencies of ηEQE = (19.3±0.4) \% and ηP = (66.5±1.3) lm/W are realized at a luminance level of 600 cd/ m2.",

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AU - Erickson, Nicholas C.

AU - Holmes, Russell J.

N1 - Funding Information: This work was supported in part by the NSF MRSEC Program under Award Number DMR-0819885. RJH would also like to acknowledge support from 3M through a Non-Tenured Faculty Grant.

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Y1 - 2010/8/23

N2 - We demonstrate highly efficient electrophosphorescence from devices comprising a single organic layer. High efficiency is realized by combining both hole- and electron-transporting host materials (HTMs and ETMs, respectively) into a single, graded-composition emissive layer with the green phosphorescent emitter fac-tris(2-phenylpyridine) iridium (III). The composition is continuously graded to realize nearly 100% HTM at the anode and nearly 100% ETM at the cathode. Peak external quantum and power efficiencies of ηEQE = (19.3±0.4) % and ηP = (66.5±1.3) lm/W are realized at a luminance level of 600 cd/ m2.

AB - We demonstrate highly efficient electrophosphorescence from devices comprising a single organic layer. High efficiency is realized by combining both hole- and electron-transporting host materials (HTMs and ETMs, respectively) into a single, graded-composition emissive layer with the green phosphorescent emitter fac-tris(2-phenylpyridine) iridium (III). The composition is continuously graded to realize nearly 100% HTM at the anode and nearly 100% ETM at the cathode. Peak external quantum and power efficiencies of ηEQE = (19.3±0.4) % and ηP = (66.5±1.3) lm/W are realized at a luminance level of 600 cd/ m2.

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ER -

Highly efficient, single-layer organic light-emitting devices based on a graded-composition emissive layer

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