A Study on Reversible Optical Recording Utilizing Insulator-Metal Transition

利用绝缘体-金属转变的可逆光学记录的研究

• 批准号: 01850062
• 负责人: YOSHINO Katsumi
• 金额: $ 4.99万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B).
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01850062/
• 关键词: Conducting polymer; Photo-recording; Insulator-metal transition; Poly (3-alkylthiophene); Memory; Poly (p-phenylene vinylene); Doping; Electronic structure; 絶縁体ー金属転移; ポリ(pーフェニレンビニレン); ポリチオフェン; ポリパラフェニレンビニレン

A number of conducting polymers were prepared and the mechanism, Kinetics, stability of insulator-metal transition upon doping were investigated. Effects of molecular structure and higher order structure on the fundamental properties were also investigated. A reversible optical recording was demonstrated by electrochemical doping and photo-induced doping utilizing the conducting polymer. The results can be summarized as follows. 1. The color of the conducting polymer in the undoped state which is determined by the band gap energy showed dependence on the chemical and the higher order structures of the conducting polymers. 2. The upper edges of the valence bands of the conducting polymers such as poly (3-alkylthiophene) and poly (p-phenylene vinylene) were lowered with substituent groups resulting in the improved stabilities of the derivatives of the conducting polymers and of the recording. 3. ESR measurements indicated generation of the polaron and the bipolaron during the electrochemical doping reaction. 4. Kinetics of the electrochemical doping-undoping reactions of the conducting polymers, which are controlled with diffusion rate of the dopant ions within the polymer layers, were activated with the number of the doping-undoping cycles. 5. Poly (-alkylthiophene) which was combined with a photo- dissociative dopant showed the insulator-metal transition with the light irradiation resulting in change in the color. 6. Various factors which determine the recording and erasing speeds of the optical recording and also their stability were clarified.

制备了一系列导电高分子材料，并对掺杂后的绝缘体-金属转变机理、动力学、稳定性等进行了研究。研究了分子结构和高级结构对基本性质的影响。电化学掺杂和光诱导掺杂利用导电聚合物的可逆光学记录被证明。结果可归纳如下。1.在未掺杂状态下的导电聚合物的颜色，这是由带隙能量显示依赖于化学和导电聚合物的高阶结构。2.导电聚合物如聚（3-烷基噻吩）和聚（对亚苯基亚乙烯基）的价带的上边缘被取代基降低，导致导电聚合物的衍生物和记录的稳定性提高。3. ESR测量表明，在电化学掺杂反应过程中产生的极化子和双极化子。4.导电聚合物的电化学掺杂-去掺杂反应的动力学，其控制与聚合物层内的掺杂剂离子的扩散速率，被激活与掺杂-去掺杂循环的数目。5.聚（-烷基噻吩）与光离解掺杂剂结合后，随着光的照射，其表现出绝缘体-金属转变，导致颜色的变化。6.阐明了决定光学记录的记录和擦除速度及其稳定性的各种因素。

项目成果

K.Yoshino: "Effect of Elongation on Photo-Luminescence of Poly(3-alkylthiophene)" Solid State Communications. 70. 111-113 (1989)

K.Yoshino：“伸长对聚（3-烷基噻吩）光致发光的影响”固态通信。

M.Onoda: "In Situ Electron Spin Resonance Measurements of Electrochemically Doped nーType Polythiophene" Journal of the Physical Society of Japan. 59. 213-217 (1990)

M. Onoda：“电化学掺杂 n 型聚噻吩的原位电子自旋共振测量”，日本物理学会杂志 59. 213-217 (1990)。

M.Onoda: "In Situ Electron Spin Resonance Measure ments of Electroche mically Doped nーType Polythiophene" Journal of the Physical Society of Japan. 59. 213-217 (1990)

M. Onoda：“电化学掺杂 n 型聚噻吩的原位电子自旋共振测量”，日本物理学会杂志 59. 213-217 (1990)。

K.Yoshino: "ANOMALOUS DEPENDENCE OF LUMINESCENCE OF POLY(3-ALKYLTHIOPHENE)ON TEMPERATURE AND ALKYL CHAIN LENGTH" Solid State Communications. 69. 143-146 (1989)

K.Yoshino：“聚（3-烷基噻吩）发光对温度和烷基链长度的异常依赖性”固态通信。

M.Onoda: "Anisotropy of Absorption and Photoluminescence Spectra of Stretched Poly(3ーalkylthiophene)" Japanese Journal of Applied Physics. 29. 1490-1494 (1990)

M. Onoda：“拉伸聚 (3-烷基噻吩) 的吸收和光致发光光谱的各向异性”，《日本应用物理学杂志》29. 1490-1494 (1990)。