dorsal/arxiv
View SchemaHighly efficient multilayer organic pure-blue-light emitting diodes with substituted carbazoles compounds in the emitting layer
| Authors | Alexis Fischer, Sebastien Forget, Sebastien Chenais, Marie-Claude Castex, Alain Siove, Dominique Ades, Bernard Geffroy, Christine Denis, Pascal Maisse |
|---|---|
| Categories | |
| ArXiv ID | physics/0604050 |
| URL | https://arxiv.org/abs/physics/0604050 |
| DOI | 10.1088/0022-3727/39/5/004 |
| Journal | Journal of Physics D 39 (2006) p.917 |
Abstract
Bright blue organic light-emitting diodes (OLEDs) based on 1,4,5,8,N-pentamethylcarbazole (PMC) and on dimer of N-ethylcarbazole (N,N'-diethyl-3,3'-bicarbazyl) (DEC) as emitting layers or as dopants in a 4,4'-bis(2,2'-diphenylvinyl)-1,1'-biphenyl (DPVBi) matrix are described. Pure blue-light with the C.I.E. coordinates x = 0.153 y = 0.100, electroluminescence efficiency \eta_{EL} of 0.4 cd/A, external quantum efficiency \eta_{ext.} of 0.6% and luminance L of 236 cd/m2 (at 60 mA/cm2) were obtained with PMC as an emitter and the 2,9-dimethyl-4,7-diphenyl-1,10-phenantroline (BCP) as a hole-blocking material in five-layer emitting devices. The highest efficiencies \eta_{EL.} of 4.7 cd/A, and \eta_{ext} = 3.3% were obtained with a four-layer structure and a DPVBi DEC-doped active layer (CIE coordinates x = 0.158, y=0.169, \lambda_{peak} = 456 nm). The \eta_{ext.} value is one the highest reported at this wavelength for blue OLEDs and is related to an internal quantum efficiency up to 20%.
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"abstract": "Bright blue organic light-emitting diodes (OLEDs) based on\n1,4,5,8,N-pentamethylcarbazole (PMC) and on dimer of N-ethylcarbazole\n(N,N\u0027-diethyl-3,3\u0027-bicarbazyl) (DEC) as emitting layers or as dopants in a\n4,4\u0027-bis(2,2\u0027-diphenylvinyl)-1,1\u0027-biphenyl (DPVBi) matrix are described. Pure\nblue-light with the C.I.E. coordinates x = 0.153 y = 0.100, electroluminescence\nefficiency \\eta_{EL} of 0.4 cd/A, external quantum efficiency \\eta_{ext.} of\n0.6% and luminance L of 236 cd/m2 (at 60 mA/cm2) were obtained with PMC as an\nemitter and the 2,9-dimethyl-4,7-diphenyl-1,10-phenantroline (BCP) as a\nhole-blocking material in five-layer emitting devices. The highest efficiencies\n\\eta_{EL.} of 4.7 cd/A, and \\eta_{ext} = 3.3% were obtained with a four-layer\nstructure and a DPVBi DEC-doped active layer (CIE coordinates x = 0.158,\ny=0.169, \\lambda_{peak} = 456 nm). The \\eta_{ext.} value is one the highest\nreported at this wavelength for blue OLEDs and is related to an internal\nquantum efficiency up to 20%.",
"arxiv_id": "physics/0604050",
"authors": [
"Alexis Fischer",
"Sebastien Forget",
"Sebastien Chenais",
"Marie-Claude Castex",
"Alain Siove",
"Dominique Ades",
"Bernard Geffroy",
"Christine Denis",
"Pascal Maisse"
],
"categories": [
"physics.optics"
],
"doi": "10.1088/0022-3727/39/5/004",
"journal_ref": "Journal of Physics D 39 (2006) p.917",
"title": "Highly efficient multilayer organic pure-blue-light emitting diodes with substituted carbazoles compounds in the emitting layer",
"url": "https://arxiv.org/abs/physics/0604050"
},
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