Study of Photorefractive Dynamics in Poly(triarylamine)-based Polymer Composites

• Material Type: 博士論文
• Title: Study of Photorefractive Dynamics in Poly(triarylamine)-based Polymer Composites
• Author/Editor: 桝村, 健人
• Author Heading: 桝村, 健人
• Publication Date: 2019-03-25
• Publication Date (W3CDTF): 2019-03-25
• Alternative Title: ポリトリアリールアミンを用いた高分子複合材料のフォトリフラクティブ性に関する研究
• Degree grantor/type: 京都工芸繊維大学
• Date Granted: 2019-03-25
• Dissertation Number: 甲第913号
• Degree Type: 博士(工学)
• Text Language Code: eng
• Subject Heading: Photorefractive materials; Organic materials; Dynamic gratings; Volume gratings; Photorefractive optics
• Target Audience: 一般
• Note (General): type:Thesis; The Photorefractive (PR) effect is defined as spatial modulation of the index of refraction due to charge redistribution in a nonlinear optical material. Holographic displays using the PR effect have received a great deal of attention because they can provide 3D images without special eyeglasses. For practical use of the PR materials, high external diffraction efficiency and fast response are indispensable. This thesis consists of six chapters. The PR dynamics in poly(triarylamine) (PTAA) based polymer composite was discussed from chapter 3 to chapter 5. In this study, PTAA was chosen as a PR photoconductive polymer, expected to lead fast response due to its high hole mobility.In chapter 3, the diffraction efficiency as a function of applied field demonstrated appropriate applied field region of 45-60 V μm-1. Wavelength dependency of the PR performance was examined. The shorter wavelength illumination induced higher diffraction efficiency and faster response time due to appropriate charge generation. In chapter 4, the PR dynamics of PTAA-based composite with small amount of a second electron acceptor was investigated. The second electron trap agents reduced photocurrent and suppressed the dielectric breakdown. The addition of bathophenanthroline (BPhen) provided high PR performance with response time of 397 μs, external diffraction efficiency of 5.9% and sensitivity of 1145 cm2 J-1. The effect of photoconductivity on the PR response time is discussed.In chapter 5, the composition ratio of PTAA-based composite was optimized to obtain the enhanced PR performance. The resulting composite achieved higher external diffraction efficiency of 23.9% and higher sensitivity of 1851 cm2 J-1. The key point of the optimization of the composite is the control of the absorption coefficient, related to the external diffraction efficiency. The extremely high sensitivity, as an indicator of the performance of real-time 3D holographic displays containing the elements of the response time and the external diffraction efficiency, indicated the PTAA-based PR composite as the most promising candidate of the holographic displays.
• Format (IMT): application/pdf
• Access Restrictions: インターネット公開
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 京都工芸繊維大学 : ＫＩＴ学術成果コレクション

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http://repository.lib.kit.ac.jp/repo/repository/10212/2523/D1-0913_h1.pdf fulltext

http://repository.lib.kit.ac.jp/repo/repository/10212/2523/D1-0913.pdf fulltext