Copoly[6,6′-bis(9-(2-ethylhexyl)carbazole-3-yl)/thieno-(2,5-b)thiophenylidenevinylene]-based photorefractive composite: A comparative study on conjugated and non-conjugated polymer systems
✍ Scribed by In Kyu Moon; Chil-Sung Choi; Nakjoong Kim
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 858 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1566-1199
No coin nor oath required. For personal study only.
✦ Synopsis
Photoconductivity and birefringence are two important factors that affect performances of photorefractive devices. Here, the optical properties of this composite based on copoly[6,6 0 -bis (9-(2-ethylhexyl)
malononitrile as nonlinear optical chromophore, butyl benzyl phthalate as plasticizer and C 60 as photosensitizer, has been compared to those of the corresponding non-p-conjugated polymer composite. The 50-lm thick photorefractive composite showed a diffraction efficiency 37.2% at 50 V/lm, which corresponded to a Dn of 2.62 Â 10 À3 . When we compare the speeds of the current and the non-conjugated analogue composites, the current composite has about a factor of seven larger speeds due to the p-conjugated polymer backbone. We also discuss and present simple explanation of the observed effect.