,Spectral, Thermal and Green-Light Static Recording Properties of Nickel Phthalocynine Thin Film

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We study the absorption and transmission spectra, the thermal stability and the green-light (514.5nm) staticoptical recording properties of nickel phthalocyanine (NiPc) thin film. It is found that this film occupies suit-able absorption and transmission properties, excellent thermal stability (decomposition point > 600°C) andoutstanding thermal decomposition characteristics (weight loss in one step decomposition > 60%) for green-light(514.5nm) optical recording. High reflectivity contrast (> 50%) was obtained at low writing power (5mW) andshort writing pulse-width (100ns) using an Ar+ laser (514.5nm) irradiation. Compared with azo in polymerfilms, the subphthalocyanine film and Sb-Te-Based phase change films, the NiPc film has better green-light staticrecording properties. These results indicate that metal phthalocyanine is not only a qualified material for nearinfrared optical recording but also a promising recording medium candidate for green-light DVD-R.
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