Electroactive subwavelength gratings (ESWGs) from conjugated polymers for color and intensity modulation

Thiruvelu Bhuvana, Byeonggwan Kim, Xu Yang, Haijin Shin, Eunkyoung Kim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

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 in a single device. Under the illumination of a white light, at a fixed angle of incidence, the color intensity of the diffracted light was reversibly switched from the maximum value down to 15% (85% decrease) by applying -2 to 2 V due to electrochemical (EC) 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. With electroactive subwavelength gratings (ESWGs) of P3HT, the maximum modulation of the color intensity was observed in the red-yellow quadrant in the CIE color plot, whereas for the ESWGs of P(ProDOT-Ph), the maximum modulation of the color intensity was observed in the yellow-green and green-blue quadrants. Both ESWGs showed a memory effect, keeping their color and intensity even after power was turned off for longer than 40 hours.

Original languageEnglish
Pages (from-to)3679-3686
Number of pages8
JournalNanoscale
Volume4
Issue number12
DOIs
Publication statusPublished - 2012 Jun 12

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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