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Published on: January 9, 2017
Chiral Gadolinium Halides with Narrow Ultraviolet B Circularly Polarized Luminescence
Tianyin Shao1, Wenkai Zhao1, Xinyi Niu1
1Frontiers Science Center for New Organic Matter, Tianjin Key Lab for Rare Earth Materials and Applications, Renewable Energy Conversion and Storage Center (RECAST), School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China.
Researchers developed new chiral gadolinium-based materials for efficient ultraviolet B circularly polarized luminescence (CPL). These materials show potential for applications in catalysis, polymerization, and optical encryption.
Area of Science:
- Materials Science
- Photochemistry
- Solid-State Chemistry
Background:
- Circularly polarized luminescence (CPL) in the ultraviolet B (UVB) region is crucial for applications like asymmetric catalysis and optical encryption.
- Existing CPL materials in the UVB region are underdeveloped, limiting technological advancements.
Purpose of the Study:
- To synthesize and characterize novel chiral gadolinium-based organic-inorganic hybrid metal halides.
- To investigate their potential for efficient CPL emission in the UVB region.
Main Methods:
- Construction of chiral gadolinium-based organic-inorganic hybrid metal halides, (R/S-C3H7NF3)3GdCl6 (R/S-3F-Gd).
- Characterization of photoluminescent properties, including quantum yield, spectral width, and lifetime.
- Fabrication of light-emitting diode (LED) chips coated with the synthesized materials.
Main Results:
- The synthesized R/S-3F-Gd materials exhibit efficient CPL in the UVB region.
- Achieved a high photoluminescent quantum yield of 18%, narrow full width at half maximum (~3 nm), and ultralong photoluminescence lifetime (~6.6 ms).
- Demonstrated tunable CPL via external magnetic fields and high dissymmetry factors on fabricated LED chips.
Conclusions:
- This study presents the first chiral gadolinium-based organic-inorganic hybrid metal halides with efficient UVB CPL.
- The developed materials offer a novel strategy for designing chiral luminescent materials for UVB CPL applications.
- The findings broaden the scope of chiral organic-inorganic hybrid rare-earth halides and their potential uses.
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