Stretchable electronic facial masks for photodynamic therapy

In this paper, we introduce a novel stretchable electronic facial mask for photodynamic therapy (SEFMPT) integrated with red-blue-green LED arrays, which realizes several favorable characteristics such as portability, uniformity of illuminance on the human face, and hands-free for personal long-time use. To achieve high mechanical, thermal and electrical performances of the SEFMPT, an unusual design of thick multilayer organicinorganic composite (TMOIC) serpentine interconnects and a new piecewise single-side soft pressing (PSSP) technique for encapsulation are developed, which could also be extended to the design and fabrication of other stretchable electronics. By integrating the tri-color LEDs that could independently irradiate red, blue, and green lights, the multifunctional therapeutic purpose is realized, including skin anti-aging, treatment of Propionibacterium acnes (P. acnes) and skin whitening. The exploitation of the SEFMPT provides a distinct opportunity for new developments in both photodynamic technology and wearable electronics.