A transparent light emitting touch-responsive device (Conference Presentation)

We will present a light emitting touch-responsive device (LETD) for instantaneous visualization of pressure mapping. The LETD integrates an organomental halide perovskite polymer composite emissive layer and a flexible silver nanowire composite transparent electrode. The composite emissive layer contains methylammonium lead bromide (MAPbBr3) nanocrystals uniformly dispersed in a polyethylene oxide matrix and emits an intense green luminescence. The polyethylene oxide matrix promotes the formation of small perovskite grains and a pinhole free composite film. The composite transparent electrode is separated from the emissive layer with a spacer. When a local pressure is applied, a Schottky contact is formed instantaneously between the metal and the emissive layer, and electroluminescence is produced at low voltages. The LETD is transparent, and can be bent when polyethylene terephthalate is used as the substrate. The device has fast response and can be pixelated to offer potentially new applications in robotics, motion detection, finger print devices, and interactive wallpapers.