Thermal jump measurement of the activation energy of trapped electrons in 3-methylpentane glass

When the temperature of a photoionized TMPD-3MP glassy solution is suddenly raised from 77 K to 77 K + ΔT (ΔT ～ 1 K), the recombination luminescence is enhanced, goes through a broad maximum and starts decaying. This is interpreted in terms of glass relaxation on warming. By means of a formally described model, the activation energy for electron detrapping is found to be 0.65 eV. In our opinion this large value indicates that electron detrapping is due to slow molecular rearrangements in the matrix.