| Summary: | 碩士 === 國立臺北科技大學 === 分子科學與工程系有機高分子碩士班 === 106 === OLEDs (Organic Light Emitting Diodes) are very popular researches in recent years. Among them, green phosphorescent materials are currently the best developed, with fac-tris(2-phenylpyridine) iridium [Ir(ppy)3] as the mainstream , the maximum emission wavelength at 510 nm. This paper is mainly to improve Ir(ppy)3, introduce different lengths of short fluorinated chains, synthesize Iridium metal complexes with different short fluorinated chains, and discuss the differences in luminescent properties.
2-[(4-bromomethyl)phenyl]pyridine was used as a precursor to synthesize a series of Iridium complexes with short fluorinated 2-phenylpyridine substituent as an ancillary ligand [Ir(ppy-CH2OCH2Rf)3] ( Rf = CF3, C2F4H, C2F5, C3F7, C4F8H), identified by NMR, FT-IR, GC-MS, FAB-MS.
The characteristics of organic materials have a great influence on the photoelectric performance of components. The novel fluorine-containing Iridium complexes in this paper have better thermal stability than unmodified Ir(ppy)3 (Td5>300°C) In terms of liquid fluorescence properties, it has higher quantum yield (Φ=50%~82%) and good lifetime (τ=1.3μs), and because of the introduction of a fluorine chain, it has no fear of water and oxygen.These properties make these new Iridium complexes a good green light emitting material.
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