Mechanoluminescence Color Conversion by Spontaneous Fluorescent-Dye-Diffusion in Elastomeric Zinc Sulfide Composite
Mechanoluminescence Color Conversion by Spontaneous Fluorescent-Dye-Diffusion in Elastomeric Zinc Sulfide Composite
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DOI：
10.1002/adfm.201601461
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发表时间：
2016-07-19
影响因子：
19
通讯作者：
Takezoe, Hideo
中科院分区：
文献类型：
--
作者：
Jeong, Soon Moon;Song, Seongkyu;Takezoe, Hideo
颜色转换，即通过吸收短波长光发射长波长光，是用于开发宽颜色表达技术的有吸引力的方法，并且广泛用于固态照明、染料激光器和彩色显示器。到目前为止，已经发表了许多论文，报道了发射紫外、蓝色、绿色、橙子和红色的各种机械发光材料。然而，以前的报道的策略集中在通过新开发的无机机械发光化合物对机械发光材料本身进行颜色调节。在这里，介绍了一种新的策略，机械发光（ML）的颜色操纵物理结合荧光染料与现有的机械发光材料。在聚二甲基硅氧烷（PDMS）骨架中制备了一种弹性硫化锌（ZnS）复合材料，该复合材料具有自发扩散的4-（二氰亚甲基）-2-叔丁基-6-（1，1，7，7-四甲基久洛尼啶基-9-烯基）-4H-吡喃（DCJTB），并通过DCJTB完全吸收ZnS中的绿色ML，实现了红色发光的完全颜色转换。在此基础上，成功地实现了ML从红色到绿色的颜色调谐，并利用电致发光（EL）扩展了颜色表达范围。利用DCJTB采用EL和ML的颜色差异演示了多色EL/ML机电显示。由于实现相当简单，因此相信当前的颜色转换是一种可行且常见的方法，可以为未来的ML应用程序操纵更广泛的颜色表达。
Color conversion, long-wavelength light emission by absorbing short-wavelength light, is an attractive approach for developing a broad-color expression technology and is widely used in solid-state lighting, dye-lasers, and colorful displays. Up to now, many papers have been published reporting various mechanoluminescent materials emitting color of ultraviolet, blue, green, orange, and red. However, the strategies of previous reports have focused on color-tuning of mechanoluminescent material itself through newly developing inorganic mechanoluminescent compounds. Here, a new strategy for the color manipulation of mechanoluminescence (ML) is introduced by physically combining fluorescent dyes with existing mechanoluminescent materials. An elastomeric zinc sulfide (ZnS) composite is prepared in a polydimethylsiloxane framework with spontaneously diffused 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB), and red luminescence by complete color conversion via DCJTB is demonstrated, which fully absorbed green ML from ZnS. Based on this approach, color-tuning of ML from red to green is successfully achieved and color expression range is expanded by employing electroluminescence (EL). Various-color-emitting EL/ML electromechanical display is demonstrated using color discrepancy between DCJTB employed EL and ML. As the implementation is fairly straightforward, it is believed that present color conversion is a viable and common method to manipulate broader color expression for future ML applications.