Abstract
By using a layer-by-layer (LbL) approach, we have fabricated lanthanide-based, monolithic metal-organic framework (MOF) thin films for optical applications. The thickness of the Ln-SURMOFs can be easily controlled, thereby maintaining its transparent properties, which makes them attractive for the field of optical coatings. Moreover, employing a hetero-epitaxy process, we demonstrated that Ln-SURMOF can be deposited on the top of other Ln-SURMOFs with different lanthanide ions, maintaining the crystallinity and orientation. The hetero-epitaxial multilayer architectures of Ln-SURMOF reduced the efficient energy transfer between different lanthanides ions and optimized the fabrication of Ln-MOF thin film with a straightforward modulation of the emission color. Meanwhile, the distance between lanthanide ions in Ln-SURMOFs was extended by replacing the linkers. These novel hetero-epitaxial Ln-SURMOF architectures, possess a bright future in the field of optics, photonics and optoelectronics.
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