Transient capacitance measurements of p-type hydrogenated amorphous material revealed a connection between dangling-bond relaxation and metastability. The data suggested that neutral dangling bonds were reversibly converted into metastable positive charged dangling bonds by hole trapping. These metastable positive dangling bonds re-converted into neutral dangling bonds upon annealing at high temperatures. The annealing kinetics of this process were the same as those observed for the annealing of quenched-in conductivity changes in p-type amorphous hydrogenated material.

R.S.Crandall, M.W.Carlen: Journal of Non-Crystalline Solids, 1995, 190[1-2], 133-41