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Issue 12, 2016
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Tuning dielectric transitions by B′-site mixing in hybrid double perovskite crystals (CH3NH3)2[K1−xRbxCo(CN)6] (x = 0.23–0.62)

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Abstract

Mixing of the B′-site alkali metals in the hybrid double perovskite crystals (CH3NH3)2[K1−xRbxCo(CN)6] (x = 0.23–0.62) results in a fine tuning of the phase transition temperatures and therefore the switchable dielectric constant properties. The correlations among the phase transition temperature Tc, radius of the B′-site metal ion rB′, molar ratio x and extended tolerance factor t are established as rB′ = (1 − x)rK + xrRb, x = −13.2 + 0.645Tc1/2, rB′ = −32.4 + 9.02Tc1/2 and t = 513/(14x + 616). These findings indicate the efficiency and practicability of the B′-site mixing method for tuning the phase transition-related properties of the hybrid perovskites.

Graphical abstract: Tuning dielectric transitions by B′-site mixing in hybrid double perovskite crystals (CH3NH3)2[K1−xRbxCo(CN)6] (x = 0.23–0.62)

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Publication details

The article was received on 30 Aug 2016, accepted on 12 Oct 2016 and first published on 13 Oct 2016


Article type: Research Article
DOI: 10.1039/C6QI00347H
Citation: Inorg. Chem. Front., 2016,3, 1604-1608
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    Tuning dielectric transitions by B′-site mixing in hybrid double perovskite crystals (CH3NH3)2[K1−xRbxCo(CN)6] (x = 0.23–0.62)

    C. Shi, X. Han, Y. Wang and W. Zhang, Inorg. Chem. Front., 2016, 3, 1604
    DOI: 10.1039/C6QI00347H

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