https://scholars.lib.ntu.edu.tw/handle/123456789/633179
標題: | Exploring the Charge-Trapping Behavior of Self-Assembled Sugar-based Block Copolymers with a Pendent Design in Photoassisted Memory | 作者: | Mulia, Tiffany Mumtaz, Muhammad Ercan, Ender Yang, Wei Chen Lin, Chen Fu Lin, Yan Cheng Borsali, Redouane WEN-CHANG CHEN |
關鍵字: | anthracene | carbohydrate | organic field-effect transistor | photoassisted memory | polymer electret | 公開日期: | 1-一月-2022 | 卷: | 5 | 期: | 6 | 來源出版物: | ACS Applied Polymer Materials | 摘要: | With unique advantages and features, photonic organic field-effect transistor memory has gained widespread attention over extensive research fields in recent years. In this work, we report the synthesis and device characteristics of three different sugar-based block copolymers, where each contains a pendent maltose (Mal) block and a pendent photoluminescent arene (anthracene (AN), carbazole (CZ), and fluorene (FL)) on a norbornene backbone polymerized through metathesis ring opening polymerization. The corresponding block copolymers are introduced as a polymer electret layer in the photoassisted memory. The hydrophilic maltose block paves the way for self-assembled morphology (ordered vertical cylinder and horizontal cylinder nanostructures) via solvent annealing, while the hydrophobic and photoluminescent arenes act as the charge-trapping site. The optical, electrochemical, and morphological properties were investigated to understand the impact on device performance. The photoassisted memory devices were electrically written by gate bias of −60 V for 1 s and recovered with three kinds of light sources (254-, 365-, and 530 nm lights). Among the studied devices, Mal-b-AN exhibited excellent memory performance with rapid photoresponse owing to the favorable energy levels’ alignment and morphological orientation. Accordingly, the device produced a high memory ratio (>106) over 104 s, a stable performance over 45 endurance cycles, and a wide memory window (∼35 V). This study not only established a detailed explanation of the nanostructures and energy level effect on the memory behaviors of sugar-based block copolymers with a pendent design but also provides an approach for the next-generation optoelectronic devices using green materials. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/633179 | ISSN: | 2637-6105 | DOI: | 10.1021/acsapm.2c02214 |
顯示於: | 化學工程學系 |
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