The conversion and manipulation of light via luminescent down-shifting (LDS) show promise in numerous applications. An elegant combination of lanthanide-doped polymer-derived ceramics incorporated with versatile nanopatterns is demonstrated using direct nanoimprint techniques. The prompt formation of nanoscale photonic structures enhances the fluorescence emission from the LDS while retaining the material's optical transparency. The functionality of this material is further expanded to accommodate surface energy modulation by nanopatterns. The practical applicability of this platform in photovoltaic devices is evaluated, showing distinctively enhanced efficiency and lifetime mainly attributed to the nanopattern assisted strong LDS property. Moreover, to efficiently combine two lanthanide emissions, so called a "double imprint" approach is devised by superpositioning two LDS nanopatterned arrays. Combined with the multi-functionality such as prominent LDS characteristics, color tunability, and surface energy modulation, the developed LDS platform offers promise for esthetic building-integrated photovoltaics. Multi-functional luminescent down-shifting (LDS) templates bearing subwavelength nanostructures are demonstrated. The LDS platform is tailored to photovoltaic devices to accommodate a distinctively enhanced efficiency and lifetime as a result of the nanopattern-assisted strong LDS property. Combined with the multi-functionality involving prominent LDS characteristics, color tunability and surface energy modulation, the developed LDS nanotemplate offers promise for esthetic building-integrated photovoltaics.
Bibliographical noteFunding Information:
M.N., H. -K.K., and S.J.K. contributed equally to this work. This research was supported by the Pioneer Research Center Program through the National Research Foundation of Korea, which is funded by the Ministry of Science, ICT, and Future Planning (NRF-2013M3C1A3065033). It was also partly supported by the Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant (No. 20143030011530) funded by the Korean government and by a grant from Kyung Hee University in 2015 (KHU-20150515). The authors acknowledge support from grants of 2E25373 from KIST project.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)