Cho Seokwon, Kim Changmin, Lee Song Eun, Kim Young Kwan, Yoon Seung Soo
Department of Chemistry, Sungkyunkwan University, Suwon, Kyeonggi-do 440-746, Korea.
Department of Information Display, Hongik University, Seoul, 121-791, Korea.
J Nanosci Nanotechnol. 2018 Feb 1;18(2):1251-1255. doi: 10.1166/jnn.2018.14890.
To investigate the electroluminescent (EL) properties of fluorescent materials based on fluorene-substituted naphthalene, multilayered OLEDs with the following sequence; indium- tin-oxide (ITO)/N,N'-di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl)-4,4'-diamine (NPB) (50 nm)/Blue emitting materials (30 nm)/4,7-diphenyl-1,10-phenanthroline (Bphen) (30 nm)/lithium quinolate (Liq) (2 nm)/Al (100 nm) were fabricated using these materials as emitters. These devices exhibited blue emissions. Particularly, a device using 7-(1-(1-(2-(diphenylamino)-9,9-diethyl-9H-fluoren-7- yl)naphthalen-4-yl)naphthalen-4-yl)-9,9-diethyl-N,N-diphenyl-9H-fluoren-2-amine as a blue emitting material exhibited blue emission with a luminous efficiency, a power efficiency, an external quantum efficiency, and CIE coordinates of 2.79 cd/A, 1.19 lm/W, 2.30% at 1,000 cd/m2, and (0.14, 0.12) at 8.0 V, respectively. This study demonstrates that 2-(Diphenylamino)-9,9-diethylfluorenes endcapped naphthalene derivatives have the excellent properties for blue emitting materials for OLEDs.
为了研究基于芴取代萘的荧光材料的电致发光（EL）特性，制备了具有以下结构的多层有机发光二极管（OLED）：氧化铟锡（ITO）/N，N'-二（1-萘基）-N，N'-二苯基-（1，1'-联苯）-4，4'-二胺（NPB）（50纳米）/蓝色发光材料（30纳米）/4，7-二苯基-1，10-菲咯啉（Bphen）（30纳米）/喹啉酸锂（Liq）（2纳米）/铝（100纳米），其中使用这些材料作为发光体。这些器件呈现蓝色发射。特别地，一个使用7-（1-（1-（2-（二苯基氨基）-9，9-二乙基-9H-芴-7-基）萘-4-基）萘-4-基）-9，9-二乙基-N，N-二苯基-9H-芴-2-胺作为蓝色发光材料的器件，在1000坎德拉每平方米时的发光效率、功率效率、外量子效率和CIE坐标分别为2.79坎德拉每安培、1.19流明每瓦特、2.30%，在8.0伏时为（0.14，0.12）。本研究表明，2-（二苯基氨基）-9，9-二乙基芴封端的萘衍生物作为OLED的蓝色发光材料具有优异的性能。
