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The influence of an applied electric field on reversible photodegradation ofdisperse orange 11 (DO11) doped into PMMA is measured using digital imaging andconductivity measurements. Correlations between optical imaging, which measuresphotodegradation and recovery, and photoconductivity enables an association tobe made between the damaged fragments and their contribution to current, thusestablishing that damaged fragments are charged species, or polarizable. Hence,the decay and recovery process should be controllable with the applications ofan electric field. Indeed, we find that the dye polymer system is highlysensitive to an applied electric field, which drastically affects the decay andrecovery dynamics. We demonstrate accelerated recovery when one field polarityis applied during burning, and the opposite polarity is applied duringrecovery. This work suggests that the damage threshold can be increased throughelectric field conditioning; and, the results are qualitatively consistent withthe domain model of Ramini[3, 4]. The observed behavior will provide usefulinput into better understanding the nature of the domains in the domain model,making it possible to design more robust materials using common polymers andmolecular dopants.

The influence of an electric field on photodegradation and self healing in disperse orange 11 dye-doped PMMA thin films