Highly stretchable and high-mobility simiconducting nanofibrous blend films for fully stretchable organic transistors

Stretchable organic field-effect transistors (OFETs) are fundamental components of organic integrated circuits and wearable biosensors. Stretchable organic semiconductors are core materials to realize high-mobility stretchable OFETs. Achieving polymer semiconductors with both high mobility and high stretchability is an urgent challenge. In this work, high-mobility stretchable semiconducting blend films were prepared by blending a polymer semiconductor with an elastomer. The polymer forms unique nanofibers through the nanoconfinement effect. The as-prepared blend films have low crystallinity and high aggregation degree, resulting in high stretchability and high mobility. Remarkably, the fully stretchable organic transistors exhibit hole maximum mobilities of 2.74 and 2.53 cm(2) V-1 s(-1) at 0% and 100% strain, respectively. Even at 150% strain, stretchable transistors have a maximum mobility of 1.57 cm(2) V-1 s(-1). The stretchable transistors show high mechanical robustness during 1000 stretching-releasing cycles at 30% strain.

Automated summary

In this study, high-mobility stretchable semiconducting blend films were prepared by blending a polymer semiconductor with an elastomer. The resulting blend films have low crystallinity and high aggregation degree, resulting in high stretchability and high mobility. The fully stretchable organic transistors exhibit high hole maximum mobilities at various strains and show high mechanical robustness during repeated stretching-releasing cycles.