Synthetic Control on Structure/Dimensionality and Photophysical Properties of Low Dimensional Organic Lead Bromide Perovskite

Haris, Muhammed PU and Bakthavatsalam, Rangarajan and Shaikh, Samir and Kore, Bhushan P and Moghe, Dhanashree and Gonnade, Rajesh G and Sarma, DD and Kabra, Dinesh and Kundu, Janardan (2018) Synthetic Control on Structure/Dimensionality and Photophysical Properties of Low Dimensional Organic Lead Bromide Perovskite. In: INORGANIC CHEMISTRY, 57 (21). pp. 13443-13452.

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Abstract

Low dimensional lead halide perovskites have attracted huge research interest due to their structural diversity and remarkable photophysical properties. The ability to controllably change dimensionality/structure of perovskites remains highly challenging. Here, we report synthetic control on structure/dimensionality of ethylenediammonium (ED) lead bromide perovskite from a two dimensionally networked (2DN) sheet to a one dimensionally networked (1DN) chain structure. Intercalation of solvent molecules into the perovskite plays a crucial role in directing the final dimensionality/structure. This change in dimensionality reflects strongly in the observed differences in photophysical properties. Upon UV excitation, the 1DN structure emits white light due to easily formed ``self-trapped'' excitons. 2DN perovskites show band edge blue emission (similar to 410 nm). Interestingly, Mn2+ incorporated 2DN perovskites show a highly red-shifted Mn2+ emission peak at similar to 670 nm. Such a long wavelength Mn2+ emission peak is unprecedented in the perovskite family. This report highlights the synthetic ability to control the dimensionality/structure of perovskite and consequently its photophysical properties.

Item Type:	Journal Article
Publication:	INORGANIC CHEMISTRY
Publisher:	AMER CHEMICAL SOC
Additional Information:	Copy right for this article belong to AMER CHEMICAL SOC
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	28 Nov 2018 15:13
Last Modified:	28 Nov 2018 15:13
URI:	http://eprints.iisc.ac.in/id/eprint/61173

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