Abstract：
Photoluminescence (PL) color can be tuned by mixing fluorophores emitting the three primary colors in an appropriate ratio. When color tuning is achieved on a single substrate, we can simplify device structures. We demonstrated that nanographenes (NGs), which are graphene fragments with a size of tens of nanometers, could be utilized as carriers of fluorophores. The addition of red- and blue-light-emitting fluorophores on the edge successfully reproduced the purple light. The relative PL intensities of the fluorophores could be regulated by the excitation wavelength, enabling multicolor emission between blue and red light. Owing to the triphenylamine units of the fluorophores, the NGs showed PL enhancement due to aggregation. This characteristic was valuable for the fabrication of solid polymer materials. Specifically, the functionalized NGs can be dispersed into polyvinylidene difluoride. The resultant polymer films emitted red, blue, and purple color. Our study demonstrated the potential applicability of NGs for fluorophore carriers capable of reproducing intermediate colors of light.
摘要：
可通过以适当比率混合发射三原色的荧光团来调谐光致发光(PL)颜色。当在单个基板上实现颜色调谐时，我们可以简化设备结构。我们证明了纳米石墨烯(NGs)，它们是几十纳米大小的石墨烯碎片，可以用作荧光团的载体。在边缘添加发红光和蓝光的荧光团成功地再现了紫色光。荧光团的相对PL强度可以通过激发波长来调节，使多色发射之间的蓝光和红光。由于荧光团的三苯胺单元，由于聚集，NG显示PL增强。该特性对于制造固体聚合物材料是有价值的。具体来说,官能化的NG可以分散到聚偏二氟乙烯中。所得的聚合物薄膜发出红色，蓝色,和紫色的颜色。我们的研究证明了NG对于能够再现中间色光的荧光团载体的潜在适用性。
