Journal of Sol-Gel Science and Technology ( IF 2.5 ) Pub Date : 2021-09-13 , DOI: 10.1007/s10971-021-05612-z Marita A. Cardoso 1, 2 , Sandra F. H. Correia 1 , Rute A. S. Ferreira 1 , Helena M. R. Gonçalves 2, 3 , Verónica de Zea Bermudez 2 , Rui F. P. Pereira 4 , Maria M. Silva 4 , Sónia Pereira 5 , Elvira Fortunato 5 , Teresa M. R. Maria 6 , Artur J. M. Valente 6
The technological potential of poly(methyl methacrylate) (PMMA)-based composite films doped with lanthanide-doped sol–gel derived ionosilicas (IS-Ln) previously proposed for luminescent down-shifting (LDS) and luminescent solar concentrator (LSC) layers connected to photovoltaic (PV) cells is extended here to electrochromic devices (ECDs), targeting the fabrication of single energy harvesting/conversion/management LSC-LDS/PV/ECD systems. These integrated devices have foreseen application in the windows of future zero-energy buildings of smart cities. The proof-of-concept is given with the report of the electro-optical performance of an ECD comprising an optimized electrolyte film composed of PMMA, IS-Nd, and IS-Eu, and the 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid. This amorphous electrolyte is stable below 160 °C, exhibits high ionic conductivity (2.13 × 10−4 and 8.76 × 10−4 S cm−1 at room temperature and 44 °C, respectively), and emits in the visible (red color) and near-infrared (NIR) spectral regions. The device demonstrated fast switching speed (50 s) and high transparency in the visible-to-NIR spectral regions (transmittance (T) = 79/96/89/77% at 555/1000/1500/1650 nm in the as-prepared state, respectively). Upon application of ±2.5 V for 200 cycles, at the same wavelengths, the Tbleached/Tcolored values were 44/28, 46/26, 39/20, and 27/9%, respectively, and the coloration efficiency (CE) values CEin/CEout values were −302/+181, −381/+228, −446/+267 and −734/+440 cm2 C−1, respectively.
中文翻译:
使用电致变色装置进行太阳光谱管理,包括掺杂双发光离子二氧化硅的 PMMA 薄膜
先前提出的用于发光下移 (LDS) 和发光太阳能聚光器 (LSC) 层连接的掺杂镧系元素掺杂溶胶-凝胶衍生离子二氧化硅 (IS-Ln) 的聚甲基丙烯酸甲酯 (PMMA) 基复合薄膜的技术潜力光伏 (PV) 电池在这里扩展到电致变色器件 (ECD),目标是制造单个能量收集/转换/管理 LSC-LDS/PV/ECD 系统。这些集成设备已预见应用于未来智慧城市零能耗建筑的窗户。概念验证与 ECD 的光电性能报告一起给出. 这种无定形电解质在 160 °C 以下是稳定的,-4和 8.76 × 10 -4 S cm -1在室温和 44 °C 下),并在可见光(红色)和近红外(NIR)光谱区域发射。该器件在可见光到近红外光谱区域显示出快速的开关速度(50 秒)和高透明度(在所制备的 555/1000/1500/1650 nm 处的透射率 ( T ) = 79/96/89/77%)状态,分别)。在施加 ±2.5 V 200 个循环后,在相同波长下,T漂白/ T着色值分别为 44 / 28、46 / 26、39/20 和 27/9%,着色效率 (CE) CE输入/CE输出值为-302/+181、-381/+228、-446/+267 和-734/+440 cm2 C -1,分别。