Khlifi Soumaya, Bigeon John, Amela-Cortes Maria, Dumait Noée, Loas Goulc'hen, Cordier Stephane, Molard Yann
University of Rennes, CNRS, ISCR-UMR 6226, ScanMAT-UMS 2001, FOTON-UMR6082, F-35000 Rennes, France.
ACS Appl Mater Interfaces. 2020 Mar 25;12(12):14400-14407. doi: 10.1021/acsami.9b23055. Epub 2020 Mar 10.
Passing from fossil energy sources to renewable ones, meanwhile answering the increasing world energy demand, will require innovative and low-cost technologies. Smart photovoltaic windows could fulfill our needs in this matter. Their transparency can be controlled to manage solar energy and regulate interior temperature and illumination. Here, we present the one-pot synthesis of polymer-dispersed liquid crystals (PDLCs), in which highly red-NIR phosphorescent transition metal clusters are selectively embedded, either in the polymer, in the liquid crystal, or in both phases. The PDLC matrix is used as a tunable waveguide to transfer the emitted light from nanoclusters to the edge of the device, where solar cells could be placed to convert it into electricity. Edge emission is obtained in both "off" and "on" states, with a maximum intensity for the scattering "off" one. These doped PDLCs showing photo-activity features and high stability under voltage represent key stepping stones for integration in buildings, displays, and many other technologies.
从化石能源转向可再生能源，同时满足不断增长的全球能源需求，将需要创新且低成本的技术。智能光伏窗可以满足我们在这方面的需求。它们的透明度可以被控制，以管理太阳能并调节室内温度和光照。在此，我们展示了聚合物分散液晶（PDLC）的一锅法合成，其中高红-近红外磷光过渡金属簇被选择性地嵌入聚合物、液晶或两相之中。PDLC 基质用作可调谐波导，将纳米团簇发射的光传输到器件边缘，在那里可以放置太阳能电池将其转化为电能。在“关闭”和“开启”状态下均获得边缘发射，散射“关闭”状态下强度最大。这些掺杂的 PDLC 具有光活性特征且在电压下具有高稳定性，是集成到建筑、显示器和许多其他技术中的关键基石。
