Red organic light emitting device based on TPP and a new host material
A novel coating method for fabrication of red OLEDs by using a new host material has been developed with the aid of a single furnace. The host material, zinc complex, was prepared from the reaction of zinc acetate and 2-methyl-8-hydroxyquinoline and after characterization by UV-vis, FT-IR, and 1 H N...
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Veröffentlicht in: | Applied physics. A, Materials science & processing Materials science & processing, 2014-02, Vol.114 (2), p.445-451 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A novel coating method for fabrication of red OLEDs by using a new host material has been developed with the aid of a single furnace. The host material, zinc complex, was prepared from the reaction of zinc acetate and 2-methyl-8-hydroxyquinoline and after characterization by UV-vis, FT-IR, and
1
H NMR spectroscopes was used as an emitting material in the fabrication of OLEDs. Since meso-tetraphenylporphyrin (TPP) and zinc complex have a close molecular weight, both materials were evaporated from a single furnace. Devices with TPP and structures of ITO/PEDOT:PSS (55 nm)/PVK (90 nm)/zinc complex:TPP (65 nm)/Al (180 nm) were fabricated; Without TPP green and with TPP red emission was achieved. The device with 2 % TPP that doped into the zinc complex showed the purest red emission among all devices. The device showed the CIE coordinates of 0.70 and 0.28 at 14 V and a maximum luminance of about 94.2 cd/m
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. This new method is a promising candidate for fabrication of low cost red OLEDs with a more homogeneous layer. |
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ISSN: | 0947-8396 1432-0630 |
DOI: | 10.1007/s00339-013-7627-1 |