Chromophore Concentration Effect on Photorefractive Performance of Organic Photorefractive Composites

We investigated the effect of chromophore (DB-IP-DC) on the photorefractive performance in organic photorefractive composites. We prepared several photorefractive composites; PSX-Cz:TNF:DB-IP-DC:BBP = 69:1:x:(30 − x) wt% and measured photocurrent and PR grating build-up time. The photocurrent was measured by the competition between the hole trapping and detrapping rates from DB-IP-DC and PSX-Cz. The PR grating build-up rate increased with the increment of photocurrent.