Freitas Vânia T, Fu Lianshe, Cojocariu Ana M, Cattoën Xavier, Bartlett John R, Le Parc Rozenn, Bantignies Jean-Louis, Man Michel Wong Chi, André Paulo S, Ferreira Rute A S, Carlos Luís D
†Physics Department and CICECO Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.
‡Laboratoire Charles Coulomb (L2C), UMR 5521 CNRS-Université de Montpellier, 34095 Montpellier, France.
ACS Appl Mater Interfaces. 2015 Apr 29;7(16):8770-8. doi: 10.1021/acsami.5b01281. Epub 2015 Apr 14.
The sol-gel preparation of a bridged silsesquioxane containing europium(III) salts and 2-thenoyltrifluoroacetone has been achieved from a new ethane tetracarboxamide-based organosilane. Free-standing films with thicknesses up to 440 μm and maximum absolute quantum yield (q) of 0.34 ± 0.03 (excitation at 320 nm) were prepared by the drop cast method, while thin films (∼200-400 nm) spin-coated on glass substrates led to highly luminescent coatings with q = 0.60 ± 0.02 (excitation at 345 nm). The thin films were tested as planar luminescent solar concentrators and the optimized device displays an optical conversion efficiency of 12.3% in the absorbing spectral region of the active layer (300-380 nm).
通过一种新型的基于乙烷四羧酰胺的有机硅烷，实现了含铕（III）盐和2-噻吩甲酰三氟丙酮的桥连倍半硅氧烷的溶胶-凝胶制备。通过滴铸法制备了厚度达440μm、最大绝对量子产率（q）为0.34±0.03（在320nm处激发）的自支撑薄膜，而旋涂在玻璃基板上的薄膜（约200-400nm）形成了q = 0.60±0.02（在345nm处激发）的高发光涂层。这些薄膜被测试用作平面发光太阳能聚光器，优化后的器件在活性层的吸收光谱区域（300-380nm）显示出12.3%的光转换效率。
