Efficient deep-blue and white organic light-emitting diodes based on triphenylsilane-substituted anthracene derivatives
作者:Kum Hee Lee、Jeong Keun Park、Ji Hoon Seo、Se Won Park、Young Sik Kim、Young Kwan Kim、Seung Soo Yoon
DOI:10.1039/c1jm12097b
日期:——
A series of anthracene derivatives with a triphenylsilane end-capping group, (9,9-dimethyl-2-(10-phenylanthracen-9-yl)-9H-fluoren-7-yl)triphenylsilane (PAFTPS), 9,10-bis(9,9-dimethyl-2-(triphenylsilyl)-9H-fluoren-7-yl)anthracene (BFPSA), (9,9-dimethyl-2-(9,10-diphenylanthracen-2-yl)-9H-fluoren-7-yl)triphenylsilane (DPA-2FTPS), and (9,10-eiphenylanthracen-2-yl)triphenylsilane (DPA-2TPS), have been designed, synthesized, and characterized. A device incorporating PAFTPS as the emissive layer exhibited a high external quantum efficiency of 2.02% at 20 mA cm−2 with color coordinates of (0.152, 0.072) as a non-doped blue emitter. At even higher efficiency, an external quantum efficiency up to 2.32% at 20 mA cm−2 with color coordinates of (0.155, 0.076) was obtained when doped with the blue fluorescent material, 3-(N-phenylcarbazol)vinyl-p-terphenyl (PCVtPh). Furthermore, an efficient white OLED with an external quantum efficiency, a luminous efficiency and color coordinates of 4.18%, 9.14 cd A−1 at 1000 cd m−2 and (0.43, 0.41) at 1000 cd m−2 was demonstrated by exploiting this highly efficient blue fluorescent material (PAFTPS) as a host in the blue emitting layer.
一系列带有三苯基硅烷封端基团的蒽衍生物,(9,9-二甲基-2-(10-苯基蒽-9-基)-9H-芴-7-基)三苯基硅烷(PAFTPS)、9,10-双(9,9-二甲基-2-(三苯基甲硅烷基)-9H-芴-7-基)蒽 (BFPSA)、(9,9-二甲基-2-(9,10-二苯基蒽-2-基)-9H-芴-7-基)三苯基硅烷(DPA-2FTPS)和(9,10-苯蒽-2-基)三苯基硅烷(DPA-2TPS)已被设计、合成和表征。采用 PAFTPS 作为发射层的器件作为非掺杂蓝色发射体在 20 mA cm−2 下表现出 2.02% 的高外量子效率,色坐标为 (0.152, 0.072)。在更高的效率下,当掺杂蓝色荧光材料3-(N-苯基咔唑)乙烯基-对三联苯时,在20 mA cm−2下获得高达2.32%的外量子效率,色坐标为(0.155, 0.076) (PCVtPh)。此外,利用该技术,还展示了一种高效的白色 OLED,其外量子效率、发光效率和色坐标为 4.18%,在 1000 cd m−2 时为 9.14 cd A−1,在 1000 cd m−2 时为 (0.43, 0.41)。高效蓝色荧光材料(PAFTPS)作为蓝色发光层的主体。