Efficient Ultraviolet Circularly Polarized Luminescence in Zero-Dimensional Hybrid Cerium Bromides

Li，Chen1; Wei，Yi1; Zhang，Yan1; Luo，Zhishan2; Liu，Yulian1; He，Meiying1; Quan，Zewei1,2

2024-06-21

10.1002/anie.202403727

Angewandte Chemie - International Edition   影响因子和分区

1433-7851

1521-3773

Ultraviolet circularly polarized luminescence (UV-CPL) with high photon energy shows great potential in polarized light sources and stereoselective photopolymerization. However, developing luminescent materials with high UV-CPL performance remains challenging. Here, we report a pair of rare earth Ce-based zero-dimensional (0D) chiral hybrid metal halides (HMHs), R/S-(CHN)CeBr, which exhibits characteristic UV emissions derived from the Ce 5d–4f transition. The compounds show simultaneously high photoluminescent quantum yields of (32–39)% and large luminescent dissymmetry factor (|g|) values of (1.3–1.5)×10. Thus, the figures of merits of R/S-(CHN)CeBr are calculated to be (4.5–5.8)×10, which are superior to the reported UV-CPL emissive materials. Additionally, nearly 91 % of their PL intensities at 300 K can be well preserved at 380 K (LED operating temperature) without phase transition or decomposition, demonstrating the excellent structural and optical thermal stabilities of R/S-(CHN)CeBr. Based on these enantiomers, the fabricated UV-emitting CP-LEDs exhibit high polarization degrees of ±1.0 %. Notably, the UV-CPL generated from the devices can significantly trigger the enantioselective photopolymerization of diacetylene with remarkable stereoselectivity, and consequently yield polymerized products with the anisotropy factors of circular dichroism (g) up to ±3.9×10, outperforming other UV-CPL materials and demonstrating their great potential as UV-polarized light sources.

circularly polarized luminescence rare earth halide ultraviolet emission zero-dimensional hybrid cerium bromides

SCI ; EI

英语

第一 ; 通讯

CHEMISTRY

2-s2.0-85193706808

Scopus

1.Department of Chemistry,Southern University of Science and Technology (SUSTech),Shenzhen,Guangdong,518055,China
2.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology (SUSTech),Shenzhen,Guangdong,518055,China

Li，Chen,Wei，Yi,Zhang，Yan,et al. Efficient Ultraviolet Circularly Polarized Luminescence in Zero-Dimensional Hybrid Cerium Bromides[J]. Angewandte Chemie - International Edition,2024,63(26).

Li，Chen.,Wei，Yi.,Zhang，Yan.,Luo，Zhishan.,Liu，Yulian.,...&Quan，Zewei.(2024).Efficient Ultraviolet Circularly Polarized Luminescence in Zero-Dimensional Hybrid Cerium Bromides.Angewandte Chemie - International Edition,63(26).

Li，Chen,et al."Efficient Ultraviolet Circularly Polarized Luminescence in Zero-Dimensional Hybrid Cerium Bromides".Angewandte Chemie - International Edition 63.26(2024).