https://scholars.lib.ntu.edu.tw/handle/123456789/598259
標題: | Volatility Transition from Short-Term to Long-Term Photonic Transistor Memory by Using Smectic Liquid Crystalline Molecules as a Floating Gate | 作者: | Li, G.-S. Hung, C.-C. Chiang, Y.-C. Lin, Y.-C. Yang, Y.-F. Yang, W.-C. Yen, H.-C. Chen, C.-K. Hsu, L.-C. WEN-CHANG CHEN |
關鍵字: | liquid crystals;photomemory;rod-like molecules;smectic mesophase;transistor-type memory;Organic field effect transistors;Smectic liquid crystals;Thiophene;Field-effect transistor;Floating gates;Liquid-crystals;Photomemory;Photonic fields;Rod-like molecule;Smectic liquid crystalline;Smectic mesophases;Transistor types;Transistor-type memory;Molecules | 公開日期: | 2021 | 來源出版物: | Advanced Electronic Materials | 摘要: | Rod-like molecules with liquid crystalline phase transitions show highly ordered stacking and orientation, which is promising as the floating gate electret in high-performance photonic field-effect transistor (FET) memory. In this work, a series of rod-like molecules, alkyl-dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (Cn-DNTT), are investigated with a smectic liquid crystalline phase transition. The photonic FET memory featuring these rod-like molecules is correlated with their morphology and crystallographic properties. A volatility transition from short?term to long?term memory behavior is found by utilizing the smectic liquid crystalline phase transitions (SmX, X = H, K, E) to orient the stacking in the floating gate. Accordingly, the annealed 2,9-didecyldinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (C10-DNTT) polycrystalline film with the optimized alkyl chain length achieved preferential end-on orientation associated with the herringbone-type stacking to store charges during photowriting, along with effective charge tunneling for the trapped charges during electrical erasing. Therefore, the resultant photonic FET memory provided a superior ON/OFF current ratio of up to 105 with retention of 104 after 104 s. The results demonstrate that rod-like molecules with smectic liquid crystalline phase and highly ordered orientation have great potentials for developing high-performance photonic FET memory. ? 2021 Wiley-VCH GmbH |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118490593&doi=10.1002%2faelm.202101123&partnerID=40&md5=fbbe65af8979d6a8ae17575026d42d00 https://scholars.lib.ntu.edu.tw/handle/123456789/598259 |
ISSN: | 2199160X | DOI: | 10.1002/aelm.202101123 |
顯示於: | 化學工程學系 |
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