Abstract

We have shown that efficient superbroadband near-IR luminescence can be realized in bismuth-doped high-silica nanocrystalline zeolites. The emission band covered the range of 930–1620 nm, with a maximum peak at 1146.3nm, an FWHM of 152nm, and a lifetime of over 300μs under the excitation of a 488nm laser line. The observed luminescence was attributed to subvalent Bi (Bi+) ions formed in the annealed zeolites. These Bi-doped nanozeolites may find applications as superbroadband near-IR nano-optical sources.

© 2009 Optical Society of America

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