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Charge carrier transport in thin conjugated polymer films: influence of morphology and polymer/substrate interactions
Journal article   Open access   Peer reviewed

Charge carrier transport in thin conjugated polymer films: influence of morphology and polymer/substrate interactions

Ban Xuan Dong, J. K. Wenderott and Peter F. Green
Colloid and polymer science, v 299(3), pp 439-456
01 Mar 2021
url
https://www.osti.gov/servlets/purl/1665856View
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Abstract

Chemistry Chemistry, Physical Science & Technology Physical Sciences Polymer Science
The performance of conjugated polymer (CP)-based electronic devices relies on optimal charge carrier mobilities, which are determined by monomeric architecture, degree of polymerization, chain conformation, and the nano- and mesoscale morphologies. With regard to the latter, we discuss two effects that have received limited attention in the literature, yet important for device performance optimization: (1) the role of morphological disorder and of CP/substrate interactions on the in-plane and out-of-plane carrier transport in CPs; (2) the impact of morphological disorder on charge transfer at the CP/substrate interface. The emergence of film thickness-dependent carrier mobilities, varying over two orders of magnitude within a length scale of 200 nm, and band-bending phenomena, extending tens of nanometers within the CP, are associated with these effects. These findings suggest areas for further research in order to enable widespread applications of next-generation CP-based devices.

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Collaboration types
Domestic collaboration
Web of Science research areas
Chemistry, Physical
Polymer Science
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