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- W4296087135 abstract "Blending semiconductor polymers (SPs) with insulator polymers (IPs) is an effective strategy for preparing high-performance stretchable electronics. The key is the continuity of the semiconductor structure in the blend films, so the precise regulation of phase separation is the major challenge. Here, two key strategies that influence blend films were systematically investigated, including optimizing the solution-processable technique and controlling the semiconductor molecular weight (labeled LSP for 23.5 kDa, MSP for 108.5 kDa, and HSP for 222.6 kDa). Compared to the spin-coated (SC) films, the assembly on water-surface (AOW) films have uniform morphology, ordered microstructure, and better charge transport properties. During the formation of AOW films, SPs and IPs tend to move toward air and water, respectively, yielding a vertical phase separation structure. Moreover, a proportion of SPs are embedded in the SEBS matrix, with LSP forming an aggregated island structure and HSP forming a nanobunch network structure. For LSP, the introduction of an appropriate amount of SEBS can assist in the formation of an ordered film microstructure. The average mobility of the blend film LSP-SEBS (30%) is around 2.52 cm2 V–1 S–1, much higher than that of the neat film LSP (1.03 cm2 V–1 S–1). For HSP, the mechanical properties can be significantly improved by tuning the amount of SEBS, while maintaining favorable electrical properties. The highest mobility at 100% strain was calculated to be 0.73 and 0.21 cm2 V–1 S–1, for the blend film HSP-SEBS (70%) and the neat film HSP, respectively. Therefore, this study shows that optimizing the solution-processable technique as well as controlling the semiconductor molecular weight are promising and effective strategies for developing blend films, with good electrical and mechanical properties." @default.
- W4296087135 created "2022-09-17" @default.
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- W4296087135 date "2022-09-08" @default.
- W4296087135 modified "2023-09-26" @default.
- W4296087135 title "Improving Electrical and Mechanical Properties of Blend Films via Optimizing Solution-Processable Techniques and Controlling the Semiconductor Molecular Weight" @default.
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- W4296087135 doi "https://doi.org/10.1021/acs.macromol.2c00765" @default.
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