5 years ago

Two-Dimensional Metal-Organic Layers as a Bright and Processable Phosphor for Fast White-Light Communication

Two-Dimensional Metal-Organic Layers as a Bright and Processable Phosphor for Fast White-Light Communication
Zi Wang, Cankun Zhang, Cheng Wang, Bangjiang Lin, Tingting Wang, Xuefu Hu, Lingyun Cao, Wenbin Lin, Jingzheng Zhang
A metal–organic layer (MOL) is a new type of 2D material that is derived from metal–organic frameworks (MOFs) by reducing one dimension to a single layer or a few layers. Tetraphenylethylene-based tetracarboxylate ligands (TCBPE), with aggregation-induced emission properties, were assembled into the first luminescent MOL by linking with Zr6O4(OH)6(H2O)2(HCO2)6 clusters. The emissive MOL can replace the lanthanide phosphors in white light emitting diodes (WLEDs) with remarkable processability, color rendering, and brightness. Importantly, the MOL-WLED exhibited a physical switching speed three times that of commercial WLEDs, which is crucial for visible-light communication (VLC), an alternative wireless communication technology to Wi-Fi and Bluetooth, by using room lighting to carry transmitted signals. The short fluorescence lifetime (2.6 ns) together with high quantum yield (50 %) of the MOL affords fast switching of the assembled WLEDs for efficient information encoding and transmission. Li-Fi: A new two-dimensional metal–organic layer, constructed from zirconium clusters and fluorescent ligands, is used as a fast phosphor to increase the response rate of white light LEDs for visible-light communication. The use of molecular phosphors increases the data transfer rate by three times, illustrating the opportunity in using nano-assemblies for advanced information technology.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201702037

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