Guanidinium bromide (GDBr), also called guanidine hydrobromide or guanidine monohydrobromide, is a guanidinium halide salt supplied by Ossila as a perovskite precursor material. It has the formula CH6BrN3 (CAS 19244-98-5), a molecular weight of 139.98 g/mol and a purity of 98%, and appears as a white powder or crystals with a melting point of 191 °C.
GDBr and related guanidinium compounds help form and stabilise 2D perovskite structures. Two interactions are responsible: van der Waals forces acting between neighbouring guanidinium cations, and hydrogen−halogen bonds linking guanidinium cations to halide ions in adjacent layers.
Adding the guanidinium cation to a perovskite film also improves its electronic quality. Hydrogen supplied by the guanidinium salt creates a hydrogen-bonding effect that lowers the defect density of the film and extends carrier lifetime, which makes this material relevant to researchers working on perovskite solar cells and perovskite light-emitting diodes (LEDs). Published studies have linked guanidinium to enhanced carrier lifetime and open-circuit voltage in hybrid perovskite solar cells. The product is offered in a 25 g pack size.
- Precursor material for preparing stable 2D perovskite structures.
- Additive for perovskite films to reduce defect density and lengthen carrier lifetime.
- Research and fabrication of perovskite solar cells.
- Development of perovskite light-emitting diodes (LEDs).
| Brand | Ossila |
|---|---|
| CAS number | 19244-98-5 |
| Molecular formula | CH6BrN3 |
| Purity | 98% |
| Category | — |
| Pack sizes | 25 g |
| Physical form | — |
| Storage | — |
- Product code: M2077A1
- Molecular weight: 139.98 g/mol
- Synonyms: Guanidine hydrobromide, Guanidine monohydrobromide, GDBr
- Classification / Family: Guanidinium halides, Perovskite precursor materials, Perovskite solar cells, Perovskite LEDs
- Melting point: 191 °C
- Color: White Powder/crystals
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