Stable and current independent white-emitting organic diode

Jiang, Xue; Zhang, Zhi Lin; Zhang, Bu Xin; Zhu, Wen Qing; Xu, Shao Hong

doi:10.1016/s0379-6779(01)00658-0

Cited by 36 publications

(12 citation statements)

References 12 publications

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“…Here, single-layer devices were built, using blends with emitting materials of different band gap energies, exploring partial energy transfer [28]. Single layer devices are more attractive due to its ease of fabrication, large scale production and cost effective features, and according to published data they are more stable than those built with emitters in separated layers [20,[29][30][31]. Therefore, for a system where the emission of one material spectrally overlaps with the absorption of another, a separating material had to be incorporated into the blend so as to prevent complete energy transfer and to give white emission with a wide spectral range [32].…”

Section: Introductionmentioning

confidence: 99%

Polyfluorene based blends for white light emission

Deus

Faria²,

Iamazaki

et al. 2011

Organic Electronics

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Section: Introductionmentioning

confidence: 99%

Polyfluorene based blends for white light emission

Deus

Faria²,

Iamazaki

et al. 2011

Organic Electronics

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“…The luminance of the dual-wavelength WOLED was slightly higher than that of the tri-wavelength WOLED; however, a high stability in the current efficiency was observed for both the dual-and triwavelength WOLEDs. Table 2 shows the EL properties of the single-EML WOLEDs [4,24,[26][27][28][29][30][31]. These devices prepared using fluorescence and phosphorescence emitters were fabricated by spin-coating and vapor deposition from a variety of powder sources or a solvent premixed mixture.…”

Section: Resultsmentioning

confidence: 99%

High stability white organic light-emitting diode fabricated with the deposition of solvent premixed sources

Yang

Huang

Chang

et al. 2011

Journal of Luminescence

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“…All measurements were carried out at room temperature under ambient conditions. energy transfer can happen from NPB to Alq 3 or from Alq 3 to DCJTB [5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Methodsmentioning

confidence: 99%

Energy distribution in white organic light-emitting diodes with three primary color emitting layers

Lou

Shen

et al. 2010

Sci. China Phys. Mech. Astron.

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Two types of organic light-emitting diodes with structures of ITO/N,N′-bis(1-naphthyl)-N,N′-diphenyl,1,1′-biphenyl-4,4′-diamine (NPB)/tris(8-hydroquinolinato)aluminum(Alq 3 )/2,9-dimethyl-4,7-diphenyl-l,10-phenanthroline(BCP)/Alq 3 :4-dicyanomethylene-2-(tert-butyl)-6-methyl-4H-pyran(DCJTB)/Alq 3 /Al and ITO/NPB/BCP/Alq 3 /Alq 3 :DCJTB/Alq 3 /Al were studied. NPB was chosen as a hole-transporting/blue-emitting layer. Alq 3 adjacent to BCP acted as a green emitting layer while that adjacent to the Al cathode acted as an electron-transporting layer. Alq 3 doped with 2 wt.% DCJTB was used as a red emitting layer. The operating principles of the devices were explained by the mechanism of Förster energy transfer and the hole and exciton blocking effect of BCP. It was found that the spectral characteristics of the devices strongly depended on the relative location between the green emitting Alq 3 layer and the BCP layer, as well as their thickness. Pure white emission with the CIE coordinates of (0.33, 0.33) was achieved by mixing the three primary colors in the device with the structure of ITO/NPB(30 nm)/ BCP(6 nm)/Alq 3 (30 nm)/Alq 3 :DCJTB(30 nm)/Alq 3 (30 nm)/Al. The BCP layer played an important role in distributing the exciton energy among the three emitting layers to achieve a balanced white light. The white emission of this device was largely insensitive to the driving voltage (15-27 V) with the insertion of the green emitting Alq 3 layer.white organic light-emitting diodes, three primary color emitting layers, exciton energy distribution PACS: 73.61.Ph, 78.60.Fi

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Stable and current independent white-emitting organic diode

Cited by 36 publications

References 12 publications

Polyfluorene based blends for white light emission

Polyfluorene based blends for white light emission

High stability white organic light-emitting diode fabricated with the deposition of solvent premixed sources

Energy distribution in white organic light-emitting diodes with three primary color emitting layers

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