| Summary: | 碩士 === 國立臺灣大學 === 高分子科學與工程學研究所 === 107 === In recent years, memory devices have grown rapidly with the development of electronics. In contrast to conventional inorganic memory devices, organic memory devices meet the demands of processability, low-cost, flexibility, and realize the high-density storage. Among them, the memories with OFET construction have drawn great of attentions. The study comprises four parts. Following a general introduction contains the organic memory devices, and novel type memory devices integrated with light sensing function. Among the organic memory devices, the study focuses on the organic field-effect transistor memory devices, and put emphasis on the electret layer. As for the photo-transistor memory, in the end of Chapter 1 provides an overview of the present development and strategies for photo-responsive memory. Chapter 2 presents a promising photo-responsive polymer material, Poly CD, with the conjugated, coplanar and donor-acceptor units for electrets layer uses, debuting photo-recovery behavior for polymer electret. In addition, the photo-recovery behavior mechanism and the discussion of relationships regarding to chemical structure have been proposed. The performances to photo-recorder application were included at the end of Chapter 2. To further investigate the effect of chemically structural design on the performance of photo-responsive memory, two comparative carbazole-based copolymers, composed with and without acceptor group, were prepared. Based on the experimental results, they indicated considerably different photo response properties, and suggested that the one with conjugated, donor-acceptor containing structure is much suitable for the applications to high-density storage memory and photo-recorder. Finally, Chapter 4 is the total conclusion of the study. According to the experimental results in Chapter 2 and Chapter 3, the donor-acceptor moieties in the chemical structure and the conjugated parts were beneficial to the excitons dissociation and delocalization, which could promote the phenomenon of photo-induced recovery. In addition, the electrets with donor-acceptor structure could achieve the ambipolar memory behavior, realizing the high-density storage memory application.
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