Dankook University Professor Cho Byungki's Team Develops Non-Heat-Treated Color-Changing Fluorescent Material

Color Conversion Using Pressure and Electric Fields
Potential Applications Across Various Fields

From the left, Seongwon Park, PhD student, Byungki Cho, Professor, Jaeduk Byun, PhD. Below is the operating algorithm.

Dankook University announced on the 18th that a research team led by Professor Cho Byungki from the Department of Chemistry has developed a non-heat-treated color-converting fluorescent material.

Color-converting fluorescent materials are mainly used in anti-counterfeiting inks and sensors.

Previously, converting the color of such materials required about 10 minutes of heat treatment, but the device developed by Professor Cho's team changes color instantly when pressure is applied.

According to the paper, when pressure is applied to the blue fluorescent solid 1-B, it transforms into the green fluorescent fluid 1-G. To revert it to its original state, an electric field is applied.

In a phone interview that day, Professor Cho Byungki explained, "This material allows for the free writing of fluorescent letters at room temperature without any external power, making it applicable in various fields," and added, "In the anti-counterfeiting field, color typically changes only once, but with this material, it can be checked multiple times."

Meanwhile, this research was supported by the Mid-career Researcher Program under the Individual Basic Science & Engineering Research Program of the National Research Foundation of Korea.