The effect of oxygen on the photocurrent in poly-1,3,4-oxadiazole (POD) is discussed from the analyses of transient photocurrents, thermally stimulated current and thermally stimulated desorption of oxygen. Oxygen was considered to disturb the electron conjugated system in POD, so that the photocurrent is smaller in oxygen by a factor of 10 to 100 compared with that in vacuum. The colour of POD was different in vacuum, and in oxygen. This is also considered to be due to the same reason.
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Takai et al. (1987) studied this question.
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