FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

Product Code M2077A1-25g
Price $213 ex. VAT

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 MSDSGuanidinium bromide MSDS sheet

Literature and Reviews

  1. 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.
  2. Guanidinium benefit, O. Graydon, Nat. Photonics 10, 145 (2016); doi:10.1038/nphoton.2016.35.
  3. 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.

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...
Return to the top