7poly 2 propene 2 anthracene 6 2 3 1 u00d7 10 sup sup 8poly 2 propene 2 anthracene 7 8 2 9 u00d7 10 sup sup 7poly 2 propene 2 anthracene 8 8 1 3 u00d7 10 sup sup 6poly 2 vinyl anthracene 5 3 3 5 u00d7 10 sup sup 8poly 2 vinyl anthracene 7 9 3 5 u00d7 10 sup sup 7poly 2 vinyl anthracene 8 7 8 u00d7 10 sup sup 7______________________________________ the above data is representative of that obtained from a while host of experiments on the three above identified materials for the insulating layer it is seen from the above representative data that the gain photocurrent does vary with the identity of the insulating material utilized in the insulating layer of the gain photocurrent device the procedure of example i is followed to produce a gain photocurrent device having the gold electrodes of example ii and a phenoxy insulating layer of a thickness of between 200 to about 300a the gain photocurrent is measured as a function of the temperature at which the phenoxy material is maintained the following data are representative of the data obtained table ii______________________________________ u221a e u00d7 10 sup sup 2 sup v cm sup 1 2 temperature gain photocurrent.