Synthesis, physical and electroluminescence properties of 3,6-dipyrenylcarbazole end capped oligofluorenes

• Main Authors: Sangchart,T., Niroram,A., Kaewpuang,T., Prachumrak,N., Namuangruk,S., Sudyoadsuk,T., Keawin,T., Saengsuwan,S., Jungsuttiwong,S., Maensiri,S., Kungwan,N., Promarak,V.
• Format: Article
• Published: Royal Society of Chemistry 2015
• Subjects: Chemistry (all); Chemical Engineering (all)
• Online Access: http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84925278186&origin=inward; http://cmuir.cmu.ac.th/handle/6653943832/38911
• Institution: Chiang Mai University

© The Royal Society of Chemistry 2015. A series of oligofluorenes bearing two 3,6-dipyrenylcarbazole units as the terminal substituents, namely BPCFn (n = 1-3), were successfully synthesized and characterized as non-doped hole-transporting blue emitters. These molecules showed strong blue emission with good solubility, and thermally stable amorphous and excellent film-forming properties. OLEDs using these materials as the emissive layers were fabricated by a simple solution spin-coating process. The blue OLED with excellent device performance (brightness of 6085 cd m-2, luminance efficiency of 4.13 cd A-1 and turn-on voltage of 3.4 V) was attained from BPCF3.