Powder electroluminescent device based on paper substrate for designing multi-functional digital signage

摘要

We demonstrated the emissions of multi-colored light from a powder electroluminescent device using a thermochromic material through a temperature control.At room temperature，the emission of a sapphire blue light from the device was observed under the application of an alternative current voltage.With an increase in the temperature，the color of the thermochromic materials changed from orange to white，leading to sky blue emissions from the device owing to the decrease in energy transfer from the excited state of the phosphor to the thermochromic material.