Blue electroluminescence from polyhedral oligomeric silsesquioxane containing spirobifluorene trimers

• Published in: Synthetic metals Vol. 188; pp. 46 - 52
• Main Authors: Park, Moo-Jin, Eom, Jae-Hoon, Kim, Hee Un, Kim, Ji-Hoon, Kim, Jun-Yeop, Lee, Changhee, Hwang, Do-Hoon
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.2014; Elsevier
• Subjects: Applied sciences; Blue electroluminescence; Chemical modifications; Electronics; Exact sciences and technology; Inorganic and organomineral polymers; Optoelectronic devices; Physicochemistry of polymers; Polyhedral oligomeric silsesquioxane; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Spirobifluorene trimmers; Polyhedral oligomeric silsesquioxane; Blue electroluminescence; Spirobifluorene trimmers; Photoluminescence; Electroluminescence; Hydrosilylation; Luminescent material; Silsesquioxane copolymer; Oligomer; Redox polymer; Thermal stability; Allylation; Spiran copolymer; Optical properties; Optical absorption; Silsesquioxane polymer; Experimental study; Suzuki coupling; Electrochemical properties; Polyhedral molecule; Preparation; Organic light emitting diodes; Blue light; Fluorene derivative copolymer; Block copolymer
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2013.11.021

•A new POSS-based deep blue light-emitting nanoparticle was synthesized.•A spirobifluorene trimer was attached to POSS as the blue fluorescent chromophore.•The POSS derivative was completely soluble and formed a uniform thin film.•The POSS derivative showed blue PL as well as EL with good color purity. We synthesized and characterized a new polyhedral oligomeric silsesquioxane (POSS)-based deep blue light-emitting nanoparticle. A spirobifluorene trimer (SFL3) was used as the blue fluorescent chromophore. The allyl-functionalized SFL3 was introduced to octakis(dimethylsiloxy)silsesquioxane via hydrosilylation to afford POSS-SFL3. POSS-SFL3 was completely soluble in common organic solvents such as chloroform, tetrahydrofuran, and p-xylene, and formed a uniform thin film upon spin-coating. The UV–vis absorption and photoluminescence (PL) emission maxima of POSS-SFL3 were 356 and 425nm, respectively. An electroluminescent (EL) device with configuration ITO/PEDOT:PSS(40nm)/poly-TPD(50nm)/POSS-SFL3 (30nm)/TPBI (40nm)/LiF (0.5nm)/Al (100nm) was fabricated and showed a stable deep-blue electroluminescence with an electroluminescence (EL) maximum at 431nm and CIE chromaticity coordinates of (0.17, 0.10).