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

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