Yzeiri Xheila, Calamante Massimo, Dessì Alessio, Franchi Daniele, Pucci Andrea, Ventura Francesco, Reginato Gianna, Zani Lorenzo, Mordini Alessandro
Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy.
CNR-Institute of Chemistry of Organometallic Compounds (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy.
Molecules. 2021 Sep 7;26(18):5428. doi: 10.3390/molecules26185428.
Organic fluorophores have found broad application as emitters in luminescent solar concentrators (LSCs) for silicon photovoltaics. In particular, the preparation of organic conjugated systems with intense light-harvesting ability, emissions in the deep-red and NIR regions, and large Stokes shift values represent a very challenging undertaking. Here, we report a simple and easy way to prepare three symmetrical donor-acceptor-donor (DAD) organic-emitting materials based on a thienopyrazine core. The central core in the three dyes was modified with the introduction of aromatic substituents, aiming to affect their optical properties. The fluorophores were characterized by spectroscopic studies. In all cases, visible-NIR emissions with large Stokes shifts were found, highlighting these molecules as promising materials for the application in LSCs.
有机荧光团已在用于硅光伏的发光太阳能聚光器（LSC）中作为发光体得到广泛应用。特别是，制备具有强光捕获能力、深红色和近红外区域发射以及大斯托克斯位移值的有机共轭体系是一项极具挑战性的任务。在此，我们报告了一种基于噻吩并吡嗪核心制备三种对称供体-受体-供体（DAD）有机发光材料的简单易行的方法。通过引入芳香族取代基对三种染料的中心核心进行修饰，旨在影响它们的光学性质。通过光谱研究对荧光团进行了表征。在所有情况下，均发现了具有大斯托克斯位移的可见-近红外发射，突出了这些分子作为LSC应用中很有前景的材料。
