Guanidinium Bromide (GABr), 99.5%, 5g - MSE Supplies LLC

High Purity Guanidinium Bromide (GABr, CH6N3Br), 99.5%, 5g

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High Purity Guanidinium Bromide (GABr, CH6N3Br), 99.5%, 5g

Guanidinium Bromide (GABr) is a popular additive in bromide based perovskite materials (ABX3), such as MAPbBr3, to improve the stability of perovskite by tuning the morphology of the perovskite crystals. For inorganic perovskite materials, the introduction of highly symmetrical GA+ can effectively improve the charge carrier lifetimes, enhance defect tolerance and phase stability, passivate defects at the surface and grain boundary of perovskites, as well as stable the perovskite crystal structure, thus boosting the efficiency and stability. For organic-inorganic perovskite materials, the introduction of GA+ retards crystallization and enlarges grain sizes, resulting in uniform and compact perovskite films. Meanwhile, it can concurrently heal negatively and positively charged defects, further equilibrate charge of perovskites. 

Technical Data:

Product Name Guanidinium Bromide
  • GABr
  • GDBr
  • Guanidine hydrobromide
  • Guanidine monohydrobromide
CAS Number 19244-98-5
Chemical Formula CH6N3Br
Molecular Weight  139.98 g/mol
Purity ≥99.5%  (4 Times Purification )
Melting Point 191 °C
Appearance White Powder
Solubility Soluble in water, EtOH et al.
Packaging 5 g, or as required in glass bottle
Store 25 ℃ under N2 atmosphere
Notes 1HNMR spectra, user instruction for enquiring


[1]: Structurally Stable and Highly Enhanced Luminescent Perovskite Based on Quasi-Two-Dimensional Structures upon Addition of Guanidinium Cations. The Journal of Physical Chemistry C 124, no. 8 (2020): 4414-4420.

[2]: Guanidinium-assisted crystallization modulation and reduction of open-circuit voltage deficit for efficient planar FAPbBr3 perovskite solar cells. Chemical Engineering Journal 437 (2022): 135181.

[3]: In-situ guanidinium bromide passivation treatment of CsPbBr3 perovskite quantum dots exhibiting high photoluminescence and environmental stability. Applied Surface Science 559 (2021): 149986.