Highly efficient single-layer dendrimer light-emitting diodes with balanced charge transport | Zendy

Thomas D. Anthopoulos | Zendy; Jonathan P. J. Markham | Zendy; Ebinazar B. Namdas | Zendy; Ifor D. W. Samuel | Zendy; ShihChun Lo | Zendy; Paul L. Burn | Zendy

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Highly efficient single-layer dendrimer light-emitting diodes with balanced charge transport

Author(s) -

Thomas D. Anthopoulos,

Jonathan P. J. Markham,

Ebinazar B. Namdas,

Ifor D. W. Samuel,

ShihChun Lo,

Paul L. Burn

Publication year - 2003

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1586999

Subject(s) - dendrimer , phosphorescence , iridium , quantum efficiency , materials science , diode , optoelectronics , oled , phosphorescent organic light emitting diode , light emitting diode , luminous efficacy , layer (electronics) , tris , photochemistry , chemistry , optics , nanotechnology , fluorescence , polymer chemistry , organic chemistry , physics , catalysis , biochemistry

High-efficiency single-layer-solution-processed green light-emitting diodes based on a phosphorescent dendrimer are demonstrated. A peak external quantum efficiency of 10.4% (35 cd/A) was measured for a first generation fac-tris(2-phenylpyridine) iridium cored dendrimer when blended with 4,4′-bis(N-carbazolyl)biphenyl and electron transporting 1,3,5-tris(2-N-phenylbenzimidazolyl)benzene at 8.1 V. A maximum power efficiency of 12.8 lm/W was measured also at 8.1 V and 550 cd/m2. These results indicate that, by simple blending of bipolar and electron-transporting molecules, highly efficient light-emitting diodes can be made employing a very simple device structure.

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