Issue 24, 2016

Composition dependent optical, structural and photoluminescence characteristics of cesium tin halide perovskites

Abstract

In this article we report the structural and optical properties of varying compositions of lead free inorganic perovskite (CsSnX3 (X = Br, Cl, I)) and its tunable photoluminescence covering the entire visible to near-IR region. Optical band gap studies for prepared inorganic cesium tin halide compositions show a significant (53.5%) blue shift in the absorption spectra as the halide composition varies from I to Br and Cl. As the halide composition was varied from Cl to I, an intense and tunable PL emission was observed at room temperature covering a wide range from Vis-near IR region (420–950 nm). X-ray diffraction studies revealed that undoped compositions were orthorhombic (CsSnI3), cubic (CsSnBr3) and monoclinic (CsSnCl3) in structure at room temperature. For mixed halides, the lattice constant was found to increase gradually as the size of halide cation increases from Cl to Br and I.

Graphical abstract: Composition dependent optical, structural and photoluminescence characteristics of cesium tin halide perovskites

Article information

Article type
Communication
Submitted
24 Oct 2015
Accepted
12 Feb 2016
First published
12 Feb 2016

RSC Adv., 2016,6, 19857-19860

Composition dependent optical, structural and photoluminescence characteristics of cesium tin halide perovskites

L. Peedikakkandy and P. Bhargava, RSC Adv., 2016, 6, 19857 DOI: 10.1039/C5RA22317B

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