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Emerging efficient charge-transport landscape based on short-range order in conjugated polymers
Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
2019 (English)In: Synthetic metals, ISSN 0379-6779, E-ISSN 1879-3290, Vol. 251, p. 16p. 104-119Article, review/survey (Refereed) Published
Abstract [en]

The booming of classic semicrystalline polymers has led to the assumption and thus design guidelines that long-range order is a prerequisite to endow conjugated polymers with high charge carrier mobility. Consequently, tremendous research effort has been devoted to increasing the crystallinity of conjugated polymers, as a principal strategy to improve the solid-state long-range charge-transport properties. Indeed, noticeable progress in the polymer performance has been witnessed. However, only a limited level of crystallinity can be achieved due to the inherently disordered nature of the polymer chains, resulting in the bottlenecks of the charge carrier mobility of conjugated polymers. Encouragingly, the recent reports of substantially disordered, high-performance conjugated polymers have opened a new route for achieving efficient charge transport, and lead to new waves of progress in the field of organic electronics. The universal observation of short-range order (in the form of aggregation) in the emerging class of poorly ordered conjugated polymers seems to suggest that local order is sufficient for efficient charge transport, and that extended long-range crystallinity is not essential. This review discusses the molecular origin of the high mobilities observed in the state-of-the-art low-crystalline conjugated polymers, especially highlighting the crucial role of short-range order.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 251, p. 16p. 104-119
Keywords [en]
Donor-acceptor polymers, Short-range order, Aggregation, Seemingly disordered, High mobility, Organic field effect transistors
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-156696DOI: 10.1016/j.synthmet.2019.03.021ISI: 000466821200012Scopus ID: 2-s2.0-85063689732OAI: oai:DiVA.org:liu-156696DiVA, id: diva2:1314658
Available from: 2019-05-09 Created: 2019-05-09 Last updated: 2019-08-23Bibliographically approved

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