Intrinsically Stretchable and Self-Healing Polymer Semiconductor Materials for Wearable Electronics

Polymer semiconductors, as charge transport layers in wearable electronics, have been widely investigated due to their intrinsic flexibility. However, mechanical deformation causes the degradation of electrical performance and even causes device damage after repetitive wear and tear or accidental cutting. Rational design strategies to enhance the mechanical robustness and self-healing ability without influencing the electronic performance are paramount. In this review, recent progress of intrinsically stretchable and self-healing polymer semiconductors is reviewed, including chemical molecular design, physical geometry engineering, and physical blending strategy. These strategies regulate the mechanical and self-healing properties of polymer semiconductors through functional chemical bonds or microstructure in thin films, thus providing solutions in varying application scenarios. Their applications in wearable electronics are also provided. Finally, challenges and future research perspectives of intrinsically stretchable and self-healing polymer semiconductors are addressed in the conclusions and outlook.