Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10619119 | Synthetic Metals | 2005 | 4 Pages |
Abstract
A soluble poly(2,5-dihexyloxy)-p-phenylene vinylene (PDHOPV) was prepared via dehydrochlorination reaction from hydroquinone and n-hexyl bromide as raw materials. The PDHOPV films implanted by 20Â keV nitrogen ions (N+) in the dose range of 3.8Â ÃÂ 1015-9.6Â ÃÂ 1016Â ions/cm2 were characterized by UV-vis absorption spectra, which showed the optical absorption was raised gradually in the visible region followed by a red shift of optical absorption threshold and the band gap (Eg) was reduced from 2.12Â eV to 1.71Â eV with the increase of ion dose. The third-order nonlinear optical (NLO) susceptibilities (Ï(3)) were measured by degenerate four-wave mixing (DFWM) technique at 532Â nm. The results demonstrated that the Ï(3) value of PDHOPV film could be enhanced effectively by means of N+ ion implantation. When the ion dose was 3.8Â ÃÂ 1016Â ions/cm2, the Ï(3) value of PDHOPV film was maximized to 1.06Â ÃÂ 10â8Â esu which was almost eleven times larger than that of the pristine film. Moreover, the mechanism responsible for the variation of Ï(3) value of PDHOPV film with N+ ion dose was also discussed tentatively.
Related Topics
Physical Sciences and Engineering
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Authors
Baoming Li, Hongcai Wu, Wenhui Yi, Chao Gao, Xiaoqi Li,