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

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

Guanidinium Bromide (GABr) is a popular additive in bromide based perovskite materials (ABX₃), such as MAPbBr_3, 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:

References:

[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.