High Purity Guanidinium Iodide (GAI, CH₆N₃I), 99.5%, 5g

High Purity Guanidinium Iodide (GAI, CH₆N₃I), 99.5%, 5g

Guanidinium Iodide (GAI) is a popular additive in iodide based perovskite materials (ABX₃), such as MAPbI_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]: Surface treatment of perovskite layer with guanidinium iodide leads to enhanced moisture stability and improved efficiency of perovskite solar cells. Advanced Materials Interfaces 7, no. 14 (2020): 2000105.