Radio-frequency flexible and stretchable electronics (Key note)

Flexible and stretchable electronics have broad applications and will further change our life and improve our life quality in numerous ways in the near future. While low frequency flexible electronics and stretchable electronics have been well developed and have penetrated into many applications, the high-frequency (beyond GHz in the microwave frequency range) counterparts have faced great challenges. To realize high frequency applications, high quality semiconductor materials with high mobility/overshoot/saturation velocities and good mechanical bending properties are needed. Here, we review the development of flexible electronic devices that operate in microwave frequencies using a variety of materials, such as silicon, III-V compound semiconductors and 2D materials like MoS
₂
and graphene.