| Autor: |
Zhong, Xinhao, Panigrahi, Debdatta, Hayakawa, Ryoma, Wakayama, Yutaka, Harano, Koji, Takeuchi, Masayuki, Aimi, Junko |
| Zdroj: |
Journal of Materials Chemistry C; 7/14/2024, Vol. 12 Issue 26, p9642-9651, 10p |
| Abstrakt: |
Nonvolatile organic field-effect transistor (OFET) memories have attracted considerable attention owing to their potential applications in flexible and wearable electronic devices. The novel design of a charge-trapping material based on supramolecular miktoarm star copolymers (μ-stars) consisting of star-shaped polystyrene with a zinc phthalocyanine core (ZnPcPS4) and a pyridyl end-functionalized polymer (py-polymer) has been studied to explore the influence of self-assembled morphology on the final device performances. Supramolecular μ-stars containing the ZnPc core showed distinctive phase-separated nanostructures in the films that were different from typical polymer blends. The OFET memory devices embedded with supramolecular μ-stars exhibited ambipolar charge-trapping behavior with photoresponsive characteristics, resulting in a wide memory window (47 V) with a high on/off current ratio (>107) for a long period of time (>104 s). Furthermore, the charge-trapping properties of the polymer memory layer were studied using Kelvin probe force microscopy (KPFM), revealing enhanced charge-trapping capabilities attributed to nanoscale phase separation in the supramolecular μ-stars. This study provides the design and concept of charge-trapping materials for next-generation high-performance OFET memory devices. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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