Abstract

We report enhanced and broad-band photoluminescence (PL) behavior of C60 doped in porous silica glasses. By carrying out photoluminescence and photoluminescence-excitation spectroscopy of C60 doped in surface-unpassivated and -passivated porous glasses, we show that the interaction of C60 with the silica surface is quite strong and that the modified C60 molecules contribute only in the orange-red region (∼1.9 eV) of the observed PL spectrum. The PL intensity in the blue-green region (∼2.3 eV) observed in doped glasses is found to originate in the porous glass itself.

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