The kinetics of photodarkening (PD) in amorphous selenium has been studied experimentally at different intensities of optical excitation. Comparison between the experimental results and a proposed phenomenological model reveals the characteristic rates for conversion of structural units into reversible and irreversible states. Our results show that the relaxation of the irreversible PD states occurs over a barrier of about 0.9 eV and is described by much longer characteristic times (more that one order of magnitude) than that for the reversible states.
|Journal||Journal of Materials Science: Materials in Electronics|
|Issue number||SUPPL. 1|
|State||Published - 1 Jan 2009|