| 초록 |
A single electrochromic(EC) device with subwavelength gratings provides all spectral colors and modulation of color intensity reversibly by applying a low external voltage between -2 and 2V. Subwavelength gratings with electroactive polymers such as poly(3-hexylthiophene) (P3HT) and poly(3,4-propylenedioxythiophene-phenylene) (P(ProDOT-Ph)) controlled the color intensity for various visible colors of diffracted light. Under the fixed incident angle of a white light, the color intensity of the diffracted light was reversibly switched from the maximum value down to 15% (85% decrease) due to electrochemical reaction. All spectral colors including red, green, and blue were generated by changing the angle of incidence, and the intensity of each color was modulated electrochemically at a single EC device. Both ESWGs showed a memory effect, keeping their color and intensity even after power was turned off for longer than 40 hours. |
