Enhanced dielectric properties of poly(arylene ether nitrile) composite films employing MoS2-based semiconductors for organic film capacitor applications. (December 2021)

• Record Type: Journal Article
• Authors: Feng, Mengna; Ma, Deyu; Chen, Xuanrong; Wang, Pan; Lin, Jing
• Is Part Of: Materials science in semiconductor processing. Volume 136(2021)
• Publication Date: 2021-12
• Subjects: Semiconductor/polymer composites -- Core-shell structure -- Molybdenum disulfide -- Dielectric properties; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2021.106127
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: Polymer-based dielectric composites are potential substitute dielectrics for organic thin film capacitors. In this work, the exfoliated molybdenum disulfide (MoS2 ) was functionalized by mussel-inspired poly(dopamine) (PDA) to form core-shell structured composites (MoS2 @PDA) under easy-handling and eco-friendly conditions, and then as filler incorporated into poly(arylene ether nitrile) (PEN) matrix. The interfacial interaction and dispersion of MoS2 @PDA in PEN matrix were improved by the strong adhesion of PDA interlayer to exfoliated MoS2, π-π conjugation and hydrogen bond interactions, which formed by the polar nitrile group of PEN and catechol groups of PDA. Therefore, the PEN/MoS2 @PDA composite films exhibited enhanced dielectric constant, synchronously maintaining better flexibility, thermal stability and the same level of dielectric loss with PEN. Particularly, the addition of 20 wt% MoS2 @PDA into PEN matrix leaded to substantial growth of dielectric constant up to 12.9 at 1 kHz, while the PEN matrix was just 4.2. Meanwhile, the dielectric composites maintained relatively low dielectric loss of 0.022 at 1 kHz, which was ascribed to the improved compatibility and interfacial interaction between filler and PEN. All in all, a eco-friendly and easy-handling strategy was provided to tune the dielectric constant and dielectric loss of semiconductor/polymer composites, which has great potential to promote the development of dielectric in the fields of organic thin film capacitors. Graphical abstract: Image 1 Highlights: The core-shell structured MoS2 @PDA was prepared by bio-inspired method. The PDA interlayer improved compatibility and interfacial interaction of composites. The PEN-based composites showed high dielectric constant and reasonably low dielectric loss. The dielectric enhancement mechanism was explained systematically.