H/F Substitution Induced Large Increase of Tc in a 3D Hybrid Rare-Earth Double Perovskite Multifunctional Compound |
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Authors: | Qi Xu Le Ye Rong-Meng Liao Zhen An Chang-Feng Wang Le-Ping Miao Chao Shi Heng-Yun Ye Prof Yi Zhang |
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Institution: | 1. Jiangxi University of Science and Technology, Chaotic Matter Science Research Center
These authors contributed equally to this work.;2. Jiangxi University of Science and Technology, Chaotic Matter Science Research Center |
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Abstract: | Increasing attention has been devoted to studying perovskite-type multifunctional stimuli-responsive materials with multiple channel physical characteristics. However, it remains challenging to simultaneously achieve multifunction and regulate structural phase transition temperature in hybrid perovskites. Here, we report two three-dimensional organic–inorganic hybrid rare-earth double perovskite compounds, (HQ)2RbEu(NO3)6 ( 1 , HQ=quinuclidium) and (4FHQ)2RbEu(NO3)6 ( 2 , 4FHQ=4-fluoro-quinuclidium), which exhibit ferroelasticity, dielectric switch, and excellent photoluminescence response. The phase transition temperature of 2 increases 169 K compared with 1 through H/F substitution. This result is attributed to the H/F substitution inducing the generation of the Rb-F coordination bond between cations and anions. Meanwhile, the photoluminescence emission intensity of 2 shows no quench with the increase of temperature, in particular, the emission spectrum achieves fine regulation at high temperatures. This work provides a new solution for the realization of multi-functions and regulations of the properties based on hybrid perovskite materials with high critical temperatures. |
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Keywords: | ferroelastic inorganic-organic hybrid perovskite photoluminescence switchable dielectric constant |
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