文献类型：期刊文献

英文题名：Red, Green, and Blue Reflections Enabled in an Electrically Tunable Helical Superstructure

作者：Hsiao, Yu-Cheng[1];Yang, Zong-Han[1];Shen, Dong[2];Lee, Wei[1]

机构：[1]Natl Chiao Tung Univ, Coll Photon, Tainan 71150, Taiwan;[2]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2018

卷号：6

期号：5

外文期刊名：ADVANCED OPTICAL MATERIALS

收录：;EI(收录号：20180204629013);WOS:【SCI-EXPANDED(收录号:WOS:000426604700012)】；

基金：This work was financially supported by the Ministry of Science and Technology, Taiwan, under grant Nos. 104-2112-M-009-008-MY3 and 106-2923-M-009-002-MY3.

语种：英文

外文关键词：cholesteric liquid crystals; dielectric heating effect; self-organized helices; thermosensitive chiral dopant; tunable selective reflection

摘要：Materials with tunable optical properties in the visible spectrum are intriguingly important in science and technology. Such desired tunability can be conveniently accomplished by controlling optical materials with electric field. Now an organic film of self-organized helical superstructure producing electrically tunable reflection of visible light is introduced in this work. The composite is a dual-frequency thermosensitive cholesteric (DFTC) material consisting of a liquid crystal host doped with a binary chiral-dopant mixture including a thermosensitive chiral switch. The red, green, and blue reflections in the DFTC film can be obtained by varying the frequencies of a 45 V-rms applied voltage to induce dielectric heating. The resulting variation in temperature and, in turn, in helical pitch length, enables various wavelengths of reflection to render full-color display in a single film without the need of film stacking. As far as it is known, this is the first work to demonstrate broad electrical tuning of cholesteric reflection in red, green, and blue.