Combining Positive and Negative Dichroic Fluorophores for Advanced Light Management in Luminescent Solar Concentrators
Combining Positive and Negative Dichroic Fluorophores for Advanced Light Management in Luminescent Solar Concentrators
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DOI：
10.1002/adom.201400132
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发表时间：
2014-07-01
影响因子：
9
通讯作者：
Schenning, Albertus P. H. J.
中科院分区：
文献类型：
--
作者：
Debije, Michael G.;Menelaou, Christopher;Schenning, Albertus P. H. J.
这项工作描述了一种常见的苝双酰亚胺荧光染料 (Lumogen Red305) 在主体液晶矩阵中的意外排列。负二色性荧光团以主吸收/发射偶极子取向，对应于苝双酰亚胺核的物理长轴，垂直于主体液晶的指向矢。第二吸收偶极子垂直于主偶极子并对应于苝核的物理短轴，平行于主体液晶。 Red305 染料的两个吸收光学跃迁偶极矩的单独照射会产生单一线性偏振发射。当Red305与在液晶主体中以传统方式排列的第二正二色性香豆素型荧光团结合时，即沿着荧光团的物理长轴和主体液晶的指向矢具有吸收偶极子，可以实现先进的光管理，例如可电切换颜色以及将发射光引导至发光太阳能聚光器装置中的不同边缘。
This work describes the unexpected alignment of a common perylene bisimide fluorescent dye (Lumogen Red305) in a host liquid crystal matrix. The negative dichroic fluorophore orients with the primary absorption/emission dipole, corresponding to the physical long axis of the perylene bisimide core, perpendicular to the director of a host liquid crystal. A second absorption dipole, which lies perpendicular to the primary dipole and corresponding to the physical short axis of the perylene core, lies parallel to the host liquid crystal. Individual illumination of the two absorbing optical transition dipole moments of the Red305 dye results in a single linearly polarized emission. When Red305 is combined with a second positive dichroic Coumarin-type fluorophore that aligns in the conventional manner in a liquid crystal host, that is, with an absorption dipole along the physical long axis of the fluorophore and the director of the host liquid crystal, advanced light management is possible, such as electrically switchable colors and directing emission light to different edges in a luminescent solar concentrator device.