About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Chemistry of Materials
Paper
Preparation and Properties of (C4H9NH3)2EuI4: A Luminescent Organic-Inorganic Perovskite with a Divalent Rare-Earth Metal Halide Framework
Abstract
(C4H9NH3)2EuI4 has been prepared through the low-temperature solid-state reaction between C4H9NH2·HI and EuI2, providing the first example of a layered organic-inorganic perovskite with a divalent rare-earth metal in the perovskite sheets. The orthorhombic lattice parameters for the new compound, a = 8.913(3) Å, b = 8.759(3) Å, and c = 27.793(6) Å, refined from powder X-ray diffraction data, are similar to those previously observed for the family (C4H9NH3)2MI4 (M = Ge, Sn, Pb). The measured europium paramagnetic moment, 7.8(1) μb, is consistent with the expected 8S7/2 ground state for nominally isolated divalent europium ions. There is no evidence for magnetic ordering of these ions over the temperature range 1.8-300 K. Strong blue photoluminescence is observed at 460(1) nm, a wavelength that is red-shifted approximately 10 nm relative to that for the more three-dimensional perovskite structures CsEuI3 and CH3NH3EuI3. Thermal analysis indicates that, in an inert atmosphere, (C4H9NH3)2EuI4 undergoes bulk decomposition at temperatures above 290°C.