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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...
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