Grating Formation Time of Photorefractive Liquid Crystal Cell with Mixed Layer of PVK and $p$-PMEH-PPV
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概要
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The speed of photorefractive (PR) grating formation is determined by various processes such as the photogeneration of charge carriers, their subsequent migration by diffusion or drift in an electric field, transport of charge carriers, and reorientation of liquid crystals (LCs) by an internal space-charge field. Among them, the transport speed of charge carriers can be improved using $\pi$-conjugated polymers. Thus, we prepared a layer-structured LC cell in which poly[$o(p)$-phenylenevinylene-alt-2-methoxy-5-(2-ethylhexyloxy)-$p$-phenylenevinylene] ($p$-PMEH-PPV) was added to poly(9-vinylcarbazole) (PVK) at an appropriate ratio. Although sample cells showed slightly decreased PR effects due to the reduction of charge density and the number of trap sites, they showed an improved grating formation time required for a real-time hologram device.
- 2003-01-15
著者
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KIM Jong-Duk
Department of Chem. Eng., Korean Advanced Institute of Science and Technology
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Yoon Choon-sup
Department Of Physics Korea Advanced Institute Of Science And Technology
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Kim Hyun-wuk
Department Of Chemical & Biomolecular Engineering Korea Advanced Institute Of Science And Techno
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Kim Jong-Duk
Department of Chemical & Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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Kim Hyun-Wuk
Department of Chemical & Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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Yoon Choon-Sup
Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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Min Wook
Department of Chemical & Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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Jung Suho
Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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Min Wook
Department of Chemical & Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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