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Project ID: G5RD-CT-2001-00577
Finanziato nell'ambito di: FP5-GROWTH
Paese: France

An erbium complex was developed. It offers an absorption cross section of 4.42.10-22m² at 670nm, a sensitisation efficiency of 70%, and an erbium lifetime of nearly 4µs

We chose tetra tert-butyl phthalocyanine, for its high absorption cross section in the red. The structure of the erbium phthalocyanine was characterized using mass spectroscopy (MALDI-TOF), and the characteristic lifetimes of the singlet, triplet and erbium states were measured, along with the branching ratios and therefore the sensitisation efficiency. Our results show that the complex offers an absorption cross section of 4.42 x 10-22 m² at 670nm, a sensitisation efficiency of 70%, and an erbium lifetime of nearly 4µs. Moreover the complex seems very stable under light flux, and can be added to a fluorinated polymer in a high concentration (1-1 complex-monomer ratio). Calculation of the population inversion threshold showed that 0.8mW pump power is needed, which is half the power needed for previously published structure, at a wavelength convenient for an industrial device.

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THALES S.A.
Route Départementale 128
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