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论文类型：期刊论文

发表时间：2015-11-01

发表刊物：DYES AND PIGMENTS

收录刊物：SCIE、EI、Scopus

卷号：122

页面范围：295-301

ISSN号：0143-7208

关键字：OLEDs; Deep blue; Carbazole; Dendrimer; Oligofluorene core; Solution-processing

摘要：A group of novel dendrimers containing an oligofluorene core and oligo-carbazole dendrons, were synthesized by a Suzuki cross-coupling reaction. The dendrimers exhibit excellent thermal and amorphous stabilities, and emit deep blue fluorescence with high quantum yields of over 85%. These molecules have non-planar molecular conformations and thus possess excellent solubility and film-forming ability by solution-processing techniques. The dendrimers are used as hole-transporting emitting layers to fabricate organic light-emitting diodes (OLEDs) by a spin coating process. Bright deep blue electroluminescence is obtained with CIE coordinates of ca. (0.16, 0.09), which are quite close to the National Television System Committee (NTSC) standard blue coordinates of (0.14, 0.08). Maximum luminances were in the range of 388-711 cd m(-2) and maximum luminance efficiencies were in the range of 0.91-1.07 cd A(-1) for the derived devices. (C) 2015 Elsevier Ltd. All rights reserved.