有機電激發光元件之新穎藍光客發光體材料之合成與應用

Abstract

我們已經成功的合成出的DSA-Ph之衍生物7-DSA-Ph、7-DSA-biPh 和7-DSA-triPh，具高熱穩定性質，其Tg分別為 120℃、131℃和137℃。7-DSA-Ph為藍光客發光體的元件，在電流密度20 mA/cm2下，摻雜濃度為5 %時，電壓5.9伏特，發光效率為9.08cd/A，其最大的外部量子效率為4.75，CIE色座標為 (0.16,0.28)。 接著以7-DSA-biPh為藍光客發光體的元件，在電流密度20 mA/cm2下，摻雜濃度為9 %時，電壓5.9伏特，發光效率為6.3cd/A，其最大的外部量子效率為3.73，CIE色座標為 (0.16,0.24)。 最後以7-DSA-triPh為藍光客發光體的元件，在電流密度20 mA/cm2下，摻雜濃度為7 %時，電壓5.9伏特，發光效率為3.9cd/A，其最大的外部量子效率為3.42，CIE色座標為 (0.16,0.17)。

We have synthesized a highly efficient blue dopant based on the amino-substituted distyrylarylene (DSA-amine) fluorescent dyes. These fluorescent dyes have good thermal properties.The Tg of 7-DSA-Ph, 7-DSA-biPh and 7-DSA-triPh are 120℃, 131℃ and 137℃. Doped 7-DSA-Ph in the stable blue host material 2-methyl-9,10-di(2-naphthyl)anthracene (MADN), it achieved a luminance yield of 9.02 cd/A at 20 mA/cm2 with a CIEx,y color coordinate of [0.16, 0.28] The maximum external quantum efficiency of this device approaches the theoretical limit of 4.7% . Doped 7-DSA-biPh in MADN, it achieved a luminance yield of 6.4 cd/A at 20 mA/cm2 with a CIEx,y color coordinate of [0.15, 0.24] The maximum external quantum efficiency of this device approaches the theoretical limit of 3.73% . Doped 7-DSA-triPh in MADN, it achieved a luminance yield of 3.5cd/A at 20 mA/cm2 with a CIEx,y color coordinate of [0.16, 0.17] The maximum external quantum efficiency of this device approaches the theoretical limit of 3.42 % .