Fabrication Method of Organic Electroluminescent Devices using Spray Printing Method

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  • スプレイ法を用いた有機EL素子の作製(発光型/非発光型ディスプレイ合同研究会)
  • スプレイ法を用いた有機EL素子の作製
  • スプレイホウ オ モチイタ ユウキ EL ソシ ノ サクセイ

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Abstract

We have investigated a "spray printing method" for organic electroluminescent devices, which is suitable for simple device fabrication technique for large-area and short tact-time. Organic materials used are host polymer of polyvinylcarbazole (PVCz), electron transport material of 2,5-Bis (1-naphthyl)-1,3,4-oxadiazole (BND), and dyes of coumarin 6 (C6, green), perylene (blue), and 4-dicyanomethylene-6-cp-julolidinostyryl-2- tert-butyl-4H-pyran (red). The ratio of PVCz: END: dyes is 160:40:1 and the solution of 0.8 wt% mixture dissolved in 1,2- dichloroethane is used. Fabrication conditions of spray pressure, substrate moving velocity, and distance between substrate and nozzle are investigated. Obtained mean roughness is 50 Å. In the region distant from the center 5mm or more, groove structure is also observed due to gas flow. Current-voltage characteristics of the device are dependent on the dyes material and luminance of 1,910 cd/m^2 is obtained for the single layer device with C6 as dye.

Journal

  • ITE Technical Report

    ITE Technical Report 26.5 (0), 19-24, 2002

    The Institute of Image Information and Television Engineers

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