Achieving non-centrosymmetric (NCS) configurations in ABX 3 -type hybrid halides remains a critical challenge for nonlinear optical (NLO) aterials due to the conflicting requirements of high second-harmonic generation...
Achieving non-centrosymmetric (NCS) configurations in ABX 3 -type hybrid halides remains a critical challenge for nonlinear optical (NLO) aterials due to the conflicting requirements of high second-harmonic generation (SHG) response, wide bandgap, and phase-matching capabilities. Herein, we propose a triple-site modulation strategy by synergistically tailoring the A -site cations (2-methylimidazole cation/1-ethyl-3-methylimidazole cation), B -site metals (Sn 2+ /Pb 2+ ), and X -site halogens (Cl/Br), which effectively disrupts lattice symmetry and enables NCS crystallization. Our results demonstrate a strong SHG response, an expanded optical bandgap and increased birefringence. The optimized compound C 6 H 11 N 2 PbCl 3 exhibits a record SHG efficiency of 3.8 × KDP, a wide bandgap (3.87 eV), and enhanced birefringence (0.14), surpassing majority hybrid NLO materials. The innovative anionic framework introduced here broadens the scope of hybrid NLO crystals, facilitating the integration of various aromatic heterocyclic cations. This research provides a robust strategy for the development of advanced NLO materials.
In this work, SiO2 core-shell spheres with a dendritic pore structure were used as chromatographic support and TiO2 was coated into the pores of the SiO2@dSiO2 shell using tetrabutyl orthotitanate (TBOT) as the titani...
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In this work, SiO2@dSiO2 core-shell spheres with radial pore structure are used as the support and tetrabutyl orthotitanate (TBOT) is used as the Ti source to coat TiO2 into the pores of the SiO2@dSiO2 shell. Then, by...
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