藍光香豆素客發光體的合成及其應用在有機藍光發光二極體的性質研究

Abstract

我們成功合成出具有coumarin架構的新穎藍色客發光體材料─Ethyl 9-ethyl-6,8,8-trimethyl-2-oxo-6,7,8,9-tetrahydro-2H-pyrano[3,2-g] quinoline-3- carboxylate，簡稱BC-5，與9-Ethyl-6,8,8-trimethyl-3-(phenylsulfonyl)-6,7,8,9- tetrahydro- 2H-pyrano[3,2-g] quinolin-2-one，簡稱BC-6；此新穎藍光材料改質於高螢光性coumarin結構，試圖得到高螢光效率及純藍光色的coumarin藍光客發光體，用於解決一般發藍綠光色coumarin衍生物光色不純的問題。BC-5與BC-6擁有高液態螢光量子效率（Φf = 1.2 與 0.9），高熱穩定性（Td = 265.7℃與348℃）；經過元件結構的調整，可得到純藍光的元件光色，並且在微共振腔效應影響下，BC-5的元件光色即使在2 %摻雜濃度下，1931色度座標的x，y值和仍在0.33內。

Blue fluorescent dopants based on coumarin structure, in particular, ethyl 9-ethyl- 6,8,8-trimethyl-2-oxo-6,7,8,9-tetrahydro-2H- pyrano[3,2-g] quinoline-3- carboxylat（BC-5）and 9-ethyl-6,8,8-trimethyl-3- (phenylsulfonyl)- 6,7,8,9- tetrahydro- 2H-pyrano[3,2-g] quinolin-2-one（BC-6）have been synthesized and characterized. BC-5 and BC-6 exhibit high quantum efficiency of 1.2 and 0.9 in solution state, respectively, relative to Coumarin 1. They also have high decomposed temperature（Td = 265.7℃ for BC-5 and 348℃ for BC-6）. From the EL performance, at optimal doping concentration of 1.6%, BC-5 and BC-6 exhibit more saturated blue color in terms of CIEx, y（0.15，0.22） and CIEx, y（0.15，0.26）.