| Autor: |
Zhang Q; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan. zhangyunyiyi@gmail.com., Wang PI; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan. wangpoi.ntust@gmail.com., Ong GL; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. ogeeal@gmail.com., Tan SH; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. shenhoong5059@gmail.com., Tan ZW; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. zacktan93@hotmail.com., Hii YH; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. joshuahiiyewhan@gmail.com., Wong YL; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. yeelin823@gmail.com., Cheah KS; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. kheesang@gmail.com., Yap SL; Department of Physics, University of Malaya, Lembah Pantai, Kuala Lumpur 50603, Malaysia. slyap@um.edu.my., Ong TS; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. seantso90@gmail.com., Tou TY; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. tytou_mmu@yahoo.com., Nee CH; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. neechenhon@gmail.com., Liaw J; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan. liawdj@gmail.com., Yap SS; Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia. seongshan@gmail.com. |
| Abstrakt: |
In this work, polymers of poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-triphenylamine] with side chains containing: pyrene (C1), diphenyl (C2), naphthalene (C3), and isopropyl (C6) structures were synthesized via a Suzuki coupling reaction. The structures were verified using NMR and cyclic voltammetry measurements provide the HOMO and LUMO of the polymers. The polymer with pyrene (C1) and naphthalene (C3) produced photoluminescence in the green while the polymer with the side chain containing diphenyl (C2) and isopropyl (C6) produce dual emission peaks of blue-green photoluminescence (PL). In order to examine the electroluminescence properties of the polymers, the solutions were spin-coated onto patterned ITO anode, dried, and subsequently coated with an Al cathode layer to form pristine single layer polymer LEDs. The results are compared to a standard PFO sample. The electroluminescence spectra resemble the PL spectra for C1 and C3. The devices of C2, C3, and C6 exhibit voltage-dependent EL. An additional red emission peak was detected for C2 and C6, resulting in spectra with peaks at 435 nm, 490 nm, and 625 nm. The effects of the side chains on the spectral characteristics of the polymer are discussed. |
