We report on new material compositions enabling fully printed mechanoluminescent 3D devices by using a one-step direct write 3D printing technology. The ink is composed of PDMS, transition metal ion-doped ZnS particles, and a platinum curing retarder that enables a long open time for the printing process. 3D printed mechanoluminescent multi-material objects with complex structures were fabricated, in which light emission results from stretching or wind blowing. The multi-material printing yielded anisotropic light emission upon compression from different directions, enabling its use as a directional strain and pressure sensor. The mechanoluminescent light emission peak was tailored to match that of a perovskite material, and therefore, enabled the direct conversion of wind power in the dark into electricity, by linking the printed device to perovskite-based solar cells.
Bibliographical noteFunding Information:
This research was partially supported by the Singapore National Research Foundation, Prime Minister’s Office, Singapore, under the CREATE program: Nanomaterials for Energy and Water Management, and by the Israel National Nanotechnology Initiative FTA project on functional coatings and printing.
© 2018 The Royal Society of Chemistry.