Guanidinium Bromide

CAS Number 19244-98-5

Materials, Perovskite Materials, Perovskite Precursor Materials

Overview | Specifications | MSDS | Literature and Reviews | Resources and Support

Guanidinium bromide (GDBr) and its derivatives are known to promote and enable stable 2D perovskite structures. This is done via i) the van der Waals interactions between guanidinium cations, and ii) hydrogen−halogen bonding between guanidinium cations and halide ions of different layers.

The presence of the guanidinium cation results in reduced defect density for the perovskite film and a longer carrier lifetime, due to a hydrogen-bonding effect produced by hydrogen from the guanidinium salt.

General Information

CAS number	19244-98-5
Chemical formula	CH₆BrN₃
Molecular weight	139.98 g/mol
Synonyms	Guanidine hydrobromide, Guanidine monohydrobromide, GDBr
Classification / Family	Guanidinium halides, Perovskite precursor materials, Perovskite solar cells, Perovskite LEDs

Product Details

Purity	98%
Melting point	191 °C
Colour	White Powder/crystals

Chemical Structure

GDBr, Diaminomethaniminium fromide, Guanidine hydrobromide, Guanidine monohydroiodide — Chemical structure of Guanidinium bromide; CAS 19244-98-5

MSDS Documentation

Guanidinium bromide MSDS sheet

Literature and Reviews

Guanidinium: A Route to Enhanced Carrier Lifetime and Open-Circuit Voltage in Hybrid Perovskite Solar Cells, N. De Marco et al., Nano Lett., 16 (2), 1009–1016 (2016); DOI: 10.1021/acs.nanolett.5b04060.
Guanidinium benefit, O. Graydon, Nat. Photonics 10, 145 (2016); doi:10.1038/nphoton.2016.35.
Mixed Iodide–Bromide Methylammonium Lead Perovskite-based Diodes for Light Emission and Photovoltaics, L. Gil-Escrig et al., J. Phys. Chem. Lett., 6 (18), 3743–3748 (2015); DOI: 10.1021/acs.jpclett.5b01716.

Luminescent and Photoconductive Layered Lead Halide Perovskite Compounds Comprising Mixtures of Cesium and Guanidinium Cations, O. Nazarenko et al., Inorg. Chem., 56 (19), 11552–11564 (2017); DOI: 10.1021/acs.inorgchem.7b01204.
Synthesis, Crystal Structures, Optical Properties, and Phase Transitions of the Layered Guanidinium-Based Hybrid Perovskites [C(NH2)3]2MI4; M = Sn, Pb, M. Daub et al., Eur. J. Inorg. Chem., 1120–1126 (2017); DOI: 10.1002/ejic.201601499.

Resources and Support

Perovskite Solar Cells: Methods of Increasing Stability & Durability

This article follows up on a previous article - Perovskite Solar Cells: Causes of Degradation, and aims to introduce some methods that have been adapted to improve perovskite solar cell stability.

Learn more...