Intermediate Color Emission via Nanographenes with Organic Fluorophores

Author:

Arimura Saki1,Matsumoto Ikuya1,Sekiya Ryo1ORCID,Haino Takeharu12ORCID

Affiliation:

1. Department of Chemistry Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama, Higashi-Hiroshima Hiroshima 739-8526 Japan

2. International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM2) Hiroshima University 2-313 Kagamiyama Higashi-Hiroshima Hiroshima 739-8527 Japan

Abstract

AbstractPhotoluminescence (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.

Funder

Japan Society for the Promotion of Science

JKA Foundation

Nippon Sheet Glass Foundation for Materials Science and Engineering

Iketani Science and Technology Foundation

Tonen General Sekiyu Research/Development Encouragement and Scholarship Foundation

Publisher

Wiley

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