Mr. Tam Van Nguyen Profile

Tam Van Nguyen

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Proceedings Article | 5 September 2015 Paper

Photorefractive polymer device with improved sensitizing property

Tam Nguyen, Ha Giang, K. Kinashi, W. Sakai, N. Tsutsumi

Proceedings Volume 9564, 95640Y (2015) https://doi.org/10.1117/12.2186729

KEYWORDS: Composites, Diffraction, Polymers, Nonlinear optics, Chromophores, Photorefractive polymers, Refractive index, Video, Energy transfer, Modulation

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photorefractive (PR) application because of a fast hole mobility. In most of the previous studies, phenyl-C61-butyric acid methyl ester (PCBM) was used as a sensitizer. In this study, a high-performance charge generator perylene bisimide (PBI) is synthesized and added into the composite. PBI derivatives owning a large core of π-conjugated rings provide a high electron affinity and high charge carrier mobility. These features are promising to improve PR properties. To the best of our knowledge, it is the first time for using a combine of PCBM and PBI to improve the PR performance of PDAA-based composites. 2-(4-(azepan-1-yl)benzylidene)malononitrile (7-DCST) is used as a nonlinear optical chromophore. (4-diphenylamino)phenyl)methanol (TPAOH) is used as a plasticizer. Consequently, a diffraction efficiency of 76 % and a response time of 8 ms were obtained with 532 nm green laser under the electric field of 55 V μm^-1. As a conclusion, the introduction of PBI is a promising approach for the photorefractive composite owning the video rate response.

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