Ghazy Amr, Lastusaari Mika, Karppinen Maarit
Department of Chemistry and Materials Science, Aalto University, Espoo FI-00076, Finland.
Department of Chemistry, University of Turku, Turku FI-20014, Finland.
Chem Mater. 2023 Jul 17;35(15):5988-5995. doi: 10.1021/acs.chemmater.3c00955. eCollection 2023 Aug 8.
We demonstrate multiple roles for the organic linker in luminescent lanthanide-organic thin films grown with the strongly emerging atomic/molecular layer deposition technique. Besides rendering the hybrid thin film mechanically flexible and keeping the lanthanide nodes at a distance adequate to avoid concentration quenching, the organic moieties can act as efficient sensitizers for the lanthanide luminescence. We investigate six different aromatic organic precursors in combination with Eu ions to reveal that by introducing different nitrogen species within the aromatic ring, it is possible to extend the excitation wavelength area from the UV range to the visible range. This opens new horizons for the application space of these efficiently photoluminescent thin-film materials.
我们展示了有机连接体在通过新兴的原子/分子层沉积技术生长的发光镧系有机薄膜中的多种作用。除了使混合薄膜具有机械柔韧性并使镧系节点保持足够的距离以避免浓度猝灭外，有机部分还可以作为镧系发光的有效敏化剂。我们研究了六种不同的芳香族有机前驱体与铕离子的组合，以揭示通过在芳香环内引入不同的氮物种，可以将激发波长范围从紫外区域扩展到可见区域。这为这些高效光致发光薄膜材料的应用空间开辟了新的视野。
