A method of using a paint sensor to observe stress distributions of a stressed substrate includes the steps of applying a composition including a paintable medium and a mechanoluminescence material to a substrate, allowing the composition to form a solid film on the substrate, allowing the substrate to be stressed following the formation of the solid film, and measuring the stress the substrate has undergone by determining the mechanoluminescence of the solid film. A composition for visualizing stress or crack distributions includes a paintable medium and a mechanoluminescence material dispersed therein.

Disclosed are a self-generating pressure-sensitive light-emitting device and a method of manufacturing the same. The self-generating pressure-sensitive light-emitting device includes an electrochemical light-emitting device in which a first electrode, a light-emitting layer and a second electrode are sequentially formed; and a triboelectric self-generating device formed on the second electrode and configured to share the second electrode of the electrochemical light-emitting device, wherein the electrochemical light-emitting device and the triboelectric self-generating device share the second electrode and thus the electrochemical light-emitting device is driven due to a potential difference generated from the triboelectric self-generating device.

Disclosed are a self-generating pressure-sensitive light-emitting device and a method of manufacturing the same. The self-generating pressure-sensitive light-emitting device includes an electrochemical light-emitting device in which a first electrode, a light-emitting layer and a second electrode are sequentially formed; and a triboelectric self-generating device formed on the second electrode and configured to share the second electrode of the electrochemical light-emitting device, wherein the electrochemical light-emitting device and the triboelectric self-generating device share the second electrode and thus the electrochemical light-emitting device is driven due to a potential difference generated from the triboelectric self-generating device.

Disclosed are a self-generating pressure-sensitive light-emitting device and a method of manufacturing the same. The self-generating pressure-sensitive light-emitting device includes an electrochemical light-emitting device in which a first electrode, a light-emitting layer and a second electrode are sequentially formed; and a triboelectric self-generating device formed on the second electrode and configured to share the second electrode of the electrochemical light-emitting device, wherein the electrochemical light-emitting device and the triboelectric self-generating device share the second electrode and thus the electrochemical light-emitting device is driven due to a potential difference generated from the triboelectric self-generating device.

Disclosed are a self-generating pressure-sensitive light-emitting device and a method of manufacturing the same. The self-generating pressure-sensitive light-emitting device includes an electrochemical light-emitting device in which a first electrode, a light-emitting layer and a second electrode are sequentially formed; and a triboelectric self-generating device formed on the second electrode and configured to share the second electrode of the electrochemical light-emitting device, wherein the electrochemical light-emitting device and the triboelectric self-generating device share the second electrode and thus the electrochemical light-emitting device is driven due to a potential difference generated from the triboelectric self-generating device.

Provided are a wireless and battery-free touch-responsive luminescent fiber and a preparation method and use thereof. The wireless and battery-free touch-responsive luminescent fiber includes a conductive core layer, a dielectric layer and a light-emitting layer sequentially from inside to outside, wherein the conductive core layer is a conductive fiber material; the dielectric layer is a first composite resin containing a high dielectric constant filler, the high dielectric constant filler having a dielectric constant of 10-80; and the light-emitting layer is a second composite resin containing a rare earth luminescent material. The preparation method includes steps of subjecting the conductive core layer to fiber pay-off, dielectric layer slurry impregnation, first heating, light-emitting layer slurry impregnation and second heating in sequence to obtain the wireless and battery-free touch-responsive luminescent fiber.

Provided are a wireless and battery-free touch-responsive luminescent fiber and a preparation method and use thereof. The wireless and battery-free touch-responsive luminescent fiber includes a conductive core layer, a dielectric layer and a light-emitting layer sequentially from inside to outside, wherein the conductive core layer is a conductive fiber material; the dielectric layer is a first composite resin containing a high dielectric constant filler, the high dielectric constant filler having a dielectric constant of 10-80; and the light-emitting layer is a second composite resin containing a rare earth luminescent material. The preparation method includes steps of subjecting the conductive core layer to fiber pay-off, dielectric layer slurry impregnation, first heating, light-emitting layer slurry impregnation and second heating in sequence to obtain the wireless and battery-free touch-responsive luminescent fiber.