摘要
Ge_(2)Sb_(2)Se_(4)Te_(1),a newly developed phase change material derived from Ge_(2)Sb_(2)Te_(5),has garnered significant interest among researchers due to its numerous advantages.Here,its phase change characteristics under the electron beam evaporation method are thoroughly investigated,and a layered tunable color structure is proposed.Based on the low intrinsic absorption of Ge_(2)Sb_(2)Se_(4)Te_(1) material,it exhibits excellent dynamic tunability along with vivid color appearance including high brightness and high purity.In experiments,five representative colors—red,green,blue,yellow,and purple—were successfully prepared.The peak reflection of these samples averaged 92%,and when heated to 320°C,the temperature at which the phase transition of Ge_(2)Sb_(2)Se_(4)Te_(1) occurred,reflection loss was barely observed.In addition,after phase transition,the sideband reflection at non-target wavelengths decreased by 30%,bringing high-purity crystalline-state colors and noticeable color changes.Therefore,it is believed that the structural color scheme proposed here will contribute to the development of many fields including smart glasses,artificial retinal devices,high-resolution displays,and beyond.
基金
supported by the National Key Research and Development Program of China(No.2020YFC2200403)
the National Natural Science Foundation of China(No.62375231)
the Fujian Province Science and Technology Planning Project(No.2022H6015).
