Preface to the Special Issue on Flexible and Wearable Electronics： from Materials to Applications

Electronic systems that can cover large areas on flexible/stretchable substrateshave received increasing attention in the past several years because they enable new classes of applications that lie outside those easily addressed with wafer-based microelectronics.Some attractive examples include flexible displays,flexible solar cells,electronic textiles,sensory skins,detectors,active antennas,etc.The field expends very fast and great developments have been obtained