(Hdabco)[Na(BF)]: an ABX-type inorganic-organic hybrid perovskite compound exhibiting dielectric switching above room-temperature

The ABX 3 -type inorganic-organic hybrid perovskite (H 2 dabco)[Na(BF 4 ) 3 ] (H 2 dabco = 1,4-diazabicyclo[2.2.2]octane cation, 1 ) undergoes a static-to-dynamic phase transition at 403/386 K (heating/cooling), respectively. Variable-temperature single crystal structure analysis reveals that the H...

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Bibliographic Details
Published inCrystEngComm Vol. 21; no. 46; pp. 743 - 747
Main Authors Ye, Le, Gong, Zhi-Xin, Shi, Chao, Ma, Jia-Jun, Liang, Hao, Qi, Fang-Wei, E, Dian-Yu, Wang, Chang-Feng, Zhang, Yi, Ye, Heng-Yun
Format Journal Article
Published 26.11.2019
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Summary:The ABX 3 -type inorganic-organic hybrid perovskite (H 2 dabco)[Na(BF 4 ) 3 ] (H 2 dabco = 1,4-diazabicyclo[2.2.2]octane cation, 1 ) undergoes a static-to-dynamic phase transition at 403/386 K (heating/cooling), respectively. Variable-temperature single crystal structure analysis reveals that the H 2 dabco cation and/or BF 4 − bridging ligand undergo disordering. Dielectric measurements show a typical switchable dielectric transition between high- and low- dielectric states during the phase transition. Notably, the reversibility of dielectric switching properties of 1 was also identified. These excellent switching characteristics of 1 make it a type of switchable dielectric material. The (H 2 dabco)[Na(BF 4 ) 3 ] undergoes a static-to-dynamic phase transition at 403/386 K. Crystal structure analysis reveals that H 2 dabco 2+ and/or BF 4 − undergo disordering.
Bibliography:For ESI and crystallographic data in CIF or other electronic format see DOI
10.1039/c9ce01454c
and
1919927
Electronic supplementary information (ESI) available: TGA spectrum and details on the structural analysis. CCDC
1919928
ISSN:1466-8033
DOI:10.1039/c9ce01454c