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Triphenylamine and quinoline-containing polyfluorene for blue light-emitting diodes |
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| Authors: | Ying Lin Zhikuan Chen Dongge Ma Tengling Ye |
| Institution: | a Key Lab for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China b Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602, Singapore c State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China |
| Abstract: | A novel blue light-emitting polyfluorene-based copolymer PTHD containing electron-rich triphenylamine and electron-poor phenylquinoline side chains in the C-9 position of fluorene unit is described. By comparison of the solution and thin film photoluminescence (PL) spectra of PTHD, a considerable red-shift of Δλ = 10-15 nm was observed in the thin film PL spectrum. The emission intensity of the shoulder peak appeared in dilute solution was also significantly enhanced in the thin film. In contrast to the reference polymer poly{9,9-dihexylfluorene]-alt-9,9-di(2,4-diphenylquinoline)fluorene]}, PTHD exhibits higher HOMO energy level, and higher maximum brightness with the PLED device configuration of ITO/PEDOT:PSS/polymer70% + PBD30%/TPBI/LiF/Al. |
| Keywords: | Triphenylamine-fluorene Quinoline-fluorene Blue light-emitting diodes Hole-transporting materials |
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