Long lived photoinduced electron-transfer in (lead, zinc)phosphate glass–C 60 composites

Abstract

A phenomenon of long lived photoinduced electron transfer from the Pb 2+ ions of the glass structure to the incorporated C 60-fullerene has been observed in a group of newly developed (lead, zinc)phosphate glass–(C 60) fullerene composites upon 230–400 nm UV irradiation. Measurements of post irradiation absorption (PIA) and ESR (PIESR) spectra, of two such composites revealed the photogeneration of Pb 3+ type of holes and C 60 related anions in the matrix. An analysis of the carrier dynamics suggested that the photogenerated electrons in such systems migrate from the lead hole-sites to the fullerene sites in a tunneling mode.