کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1268056 | 1496842 | 2009 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: 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 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](/preview/png/1268056.png)
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′-bis(9-(2-ethylhexyl)carbazole-3-yl)/thieno-(2,5-b)thiophenylidenevinylene] as photoconducting material, 2-[3-[(E)-2(piperidine)-1-ethenyl]-5,5-dimethyl]-2-cyclohexenyliden]malononitrile as nonlinear optical chromophore, butyl benzyl phthalate as plasticizer and C60 as photosensitizer, has been compared to those of the corresponding non-π-conjugated polymer composite. The 50-μm thick photorefractive composite showed a diffraction efficiency 37.2% at 50 V/μm, which corresponded to a Δn of 2.62 × 10−3. 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 π-conjugated polymer backbone. We also discuss and present simple explanation of the observed effect.
Journal: Organic Electronics - Volume 10, Issue 8, December 2009, Pages 1521–1528