刮刀塗佈技術製作高效率藍光磷光小分子 有機發光二極體

Abstract

利用刮刀塗佈技術製作磷光藍光小分子有機發光體元件。以FIrPic與26DCzPPy的主客發光體結構為基礎下，改變其元件各層膜厚，材料及結構，觀察元件之特性。目標是將藍光磷光FIrPic的元件效率最佳化，同時也希望能夠降低其驅動電壓。 目前在 FIrPic: 26DCzPPy系統中電流效率在8 V時可以達24 Cd/A，功率效率為9.44 lm/W，亮度為583.2 Cd/m2。 另外在FIrPic: SimCP2系統中，在9 V時，效率可達13.1 Cd/A，亮度為673 Cd/m2。同時，若元件主動層摻雜主發光體SimCP2則可以有效降低驅動電壓。

In this thesis, highly performance blue phosphorescent small-molecule organic light-emitting diodes are fabricated by blade coating. In order to optimize the efficiency and to decrease the driving voltage of the blue phosphorescent devices, the film thickness, the transporting materials and the structure of devices are tuned while emissive layer host of 6-bis(3-(9H-carbazol-9-yl)phenyl)pyridine (26DCzPPy) and triplet emitter of bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyr-idyl)iridium(III) (FIrPic). For FIrPic: 26DCzPPy as emissive layer, the current efficiency of 24 Cd/A, power efficiency of 9.44 lm/W, and luminance of 583.2 Cd/m2 is achieved at 8 V. Besides for FIrPic: SimCP2 as emissive layer, current efficiency of 13.1 Cd/A and luminance of 673 Cd/m2 is reached at 9 V. The driving voltage can be decreased by using SimCP2 as host material of emissive layer.