Insight into High-Performance Conjugated Polymers for Organic Field-Effect Transistors

Abstract

Compared with traditional silicon electronics, electronic devices based on organic field-effect transistors (OFETs) offer unique advantages, including mechanical flexibility, solution processability, and tunable optoelectronic properties. During the past several years, impressive advances have been made in OFETs, particularly in conjugated polymer-based FETs. Numerous FETs based on high-performance polymers have been developed thanks to the efforts of material design and device optimization. A remarkable mobility of more than 10 cm 2 V À1 s À1 has been achieved in OFETs, which provides a promising opportunity for applications in flexible displays and wearable devices. This review describes the recent progress of this field from four aspects: basic knowledge, material design strategies, solution-processable techniques, and functional applications of OFETs. In addition, the current challenges and future outlook of this field are briefly discussed.

Solution‐Processed Centimeter‐Scale Highly Aligned Organic Crystalline Arrays for High‐Performance Organic Field‐Effect Transistors

“…Soluble organic semiconductors (OSCs), including small molecular weight materials and conjugated polymers, are especially interesting due to their solution processability, which ensures cost‐effective manufacturing by high‐throughput and continuous methods on flexible substrates 7. Significant effort has been made to carefully design the molecular structure of soluble OSCs in order to control their molecular packing and thin‐film morphology, which led to their mobilities far surpassing amorphous silicon, making OSCs excellent candidates for future solution‐processed logic circuits 8–11. Among these new OSCs materials, small‐molecule OSCs have achieved higher device performance because of their highly ordered molecular packing and facile purification 12.…”

Significant Difference in Semiconducting Properties of Isomeric All‐Acceptor Polymers Synthesized via Direct Arylation Polycondensation

“…[1] Extensive research studies of organic/synthetic chemistry have enabled the dramatic development of high-performance p-type semiconducting polymers, [1b,c] but the full realization of their emerging electronic applications required access to electrontransporting or rather unipolar n-type semiconducting polymers.Examples of such applications include organic thermoelectrics,a ll-polymer solar cells,a nd p-i-n perovskite solar cells. [3] Recently,t he all-acceptor or acceptor-acceptor (A-A) approach, in which the polymer main chains contain only acceptor moieties,h as been proven to be an effective molecular design strategy for unipolar n-type semiconducting polymers (Figure 1a). [3] Recently,t he all-acceptor or acceptor-acceptor (A-A) approach, in which the polymer main chains contain only acceptor moieties,h as been proven to be an effective molecular design strategy for unipolar n-type semiconducting polymers (Figure 1a).…”

Unexpectedly Large Couplings Between Orthogonal Units in Anthraquinone Polymers

“…Conjugated semiconducting polymers are an important class of materials in the field of organic electronics, in which they have the potential to be a low‐energy, low‐cost, and easily processable replacement for inorganic materials in some applications . They can conduct charges thanks to the properties of their electronic states, which are determined by the interactions between frontier orbitals of the repeating units (monomers) of the polymer.…”