作者:Yuan Jay Chang、Tahsin J. Chow
DOI:10.1039/c0jm03109g
日期:——
Two red color luminescent dyes, 4-(dicyanomethylidene)-2-tert-butyl-6-(2-(1-(4-tert-butylphenyl)-1,2,3,4-tetrahydroquinolin-6-yl)vinyl)-4H-pyran (OJ1) and 4-(dicyanomethylidene)-2-tert-butyl-6-(2-(1-(4-tert-butylphenyl)-2,3-dihydro-2-methylindolin-5-yl)vinyl)-4H-pyran (OJ2), were synthesized readily in high yields and were used in the fabrication of organic light-emitting diodes (OLEDs). The physical properties of these materials are fully investigated in this report. Their structures are analogous to the well-known red dye, 4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB), yet with better electrostability. A typical device made with OJ2 doped 1% in aluminium tris(8-hydroxyquinolinate) (Alq3) displayed a red light with a narrow bandwidth (fwhm 72 nm) at λmax 615 nm corresponding to a CIE coordinate (0.62, 0.38). The device can be turned on at 3.5 V, and reaches a luminance intensity of 43 400 cd m at ca. 20 V. It shows a luminance efficiency of 6.46 cd A−1, a power efficiency of 2.04 lm W−1, and an external quantum efficiency of 3.27%. The performances of devices are tunable either by adjusting the doping concentrations or by changing the device configurations.
两种红色发光染料,4-(二氰亚甲基)-2-叔丁基-6-(2-(1-(4-叔丁基苯基)-1,2,3,4-四氢喹啉-6-基)乙烯基)-4H-吡喃(OJ1)和 4-(二氰亚甲基)-2-叔丁基-6-(2-(1-(4-叔丁基苯基)-2、3-二氢-2-甲基吲哚啉-5-基)乙烯基)-4H-吡喃(OJ2),并将其用于制造有机发光二极管(OLED)。本报告全面研究了这些材料的物理性质。它们的结构类似于著名的红色染料--4-(二氰基亚甲基)-2-叔丁基-6-(1,1,7,7-四甲基薁-9-烯基)-4H-吡喃(DCJTB),但具有更好的电稳定性。在三(8-羟基喹啉酸)铝(Alq3)中掺入 1%的 OJ2 所制成的典型装置显示出红光,带宽较窄(fwhm 72 nm),λmax 为 615 nm,对应于 CIE 坐标(0.62, 0.38)。该器件可在 3.5 V 电压下开启,并在约 20 V 电压下达到 43 400 cd m 的发光强度。它的发光效率为 6.46 cd A-1,功率效率为 2.04 lm W-1,外部量子效率为 3.27%。通过调整掺杂浓度或改变器件配置,器件的性能是可调的。