Synthesis of terpyridine ligands and their complexation with Zn2+ and Ru2+ for optoelectronic applications |
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| Authors: | Panagiotis D. Vellis John A. Mikroyannidis Chih‐Nan Lo Chain‐Shu Hsu |
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| Affiliation: | 1. Chemical Technology Laboratory, Department of Chemistry, University of Patras, GR‐26500 Patras, Greece;2. Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan, Republic of China |
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| Abstract: | A series of soluble conjugated ligands TT , FT , PT , and NT that contained terpyridyl terminal units were synthesized by Heck coupling. These ligands absorbed at 341–434 nm and emitted blue–green light, with maximum at 440–522 nm and photoluminescence quantum yields of 0.15–0.71 in solution. The double‐layer electroluminescent devices with the configuration of ITO/PEDOT/ligand FT , PT , or NT /Ca/Al exhibited a brightness of 43–63 cd/m2. These ligands were further reacted with zinc(II) and ruthenium(II) ions and subsequent anion exchange to afford linear and supramolecular complexes. The photophysics of these complexes were investigated. A significant redshift of the emission maximum of the Zn complexes relative to the corresponding ligands was observed. The Ru complexes were used to fabricate photovoltaic devices with the structure ITO/PEDOT/Ru complex/P3HT:PCBM (1:1 wt/wt)/Ca/Al. The power conversion efficiency of these polymer–fullerene bulk heterojunction photovoltaic devices was up to 0.71%. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 7702–7712, 2008 |
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| Keywords: | electroluminescence fluorene Heck coupling light‐emitting diodes metallocomplexes phenylenevinylene photophysics photovoltaic cells self‐assembled reactions synthesis |
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