METHYLAMMONIUM BROMIDE CH₃NH₃BR 99% CAS 6876-37-5RESEARCH GRADE MATERIAL
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TAILORED SOLUTIONS FOR RESEARCH
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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Methylammonium bromide must be stored under inert atmosphere, protected from light, and sealed at room temperature to prevent moisture-induced deliquescence and hydrolysis. Exposure to atmospheric moisture or light irreversibly degrades precursor stoichiometry, compromising perovskite device reproducibility.
- Inert Atmosphere Storage: Store the material in a desiccator or nitrogen-filled glovebox with H₂O below 1 ppm and O₂ below 1 ppm to maintain structural integrity.
- Light Protection: Protect the white crystalline solid from ambient light at all times to prevent photodegradation.
- Moisture Sensitivity: Atmospheric moisture causes deliquescence and hydrolysis, irreversibly altering the stoichiometric ratio for perovskite precursor solutions.
- Oxidizer Avoidance: Avoid exposure to strong oxidizing agents, as they may induce hazardous reactions.
Proper handling of this hygroscopic salt requires exclusive use within an inert-atmosphere glovebox and immediate dissolution in anhydrous solvent. These steps ensure stoichiometric accuracy and prevent degradation for perovskite solar cell fabrication.
Required Equipment: Inert-atmosphere glovebox (H₂O < 1 ppm, O₂ < 1 ppm), Desiccator or nitrogen-filled storage container, Light-protective packaging
- Transfer to Glovebox
Transfer the sealed container of methylammonium bromide into an inert-atmosphere glovebox with H₂O and O₂ levels below 1 ppm. - Weigh Required Amount
Weigh the desired quantity of white crystalline solid using a precision balance inside the glovebox. - Dissolve in Anhydrous Solvent
Dissolve the weighed solid in anhydrous solvent immediately to prevent moisture absorption. - Use Immediately
Use the precursor solution promptly after dissolution to maintain stoichiometric integrity for perovskite film deposition.
How does the >99% purity of methylammonium bromide affect stoichiometric control in mixed-halide perovskite formulations?
The >99% purity minimizes extrinsic ionic impurities in perovskite thin films, enabling reproducible device performance. With a defined molecular weight of 111.97 g/mol, the precursor allows accurate tuning of bromide-iodide ratios in mixed-halide formulations, which is critical for bandgap engineering in perovskite solar cells.
Can methylammonium bromide be used in two-step sequential deposition protocols for perovskite thin films?
Yes, it is utilized in two-step sequential deposition protocols where the precursor solution is spin-coated onto pre-deposited films for in-situ perovskite conversion. It also functions as the organic cation component in two-dimensional perovskite phases when combined with longer-chain alkylammonium spacer cations.
What are the required storage and handling conditions for methylammonium bromide to prevent degradation?
Store in a desiccator or nitrogen-filled glovebox protected from ambient light at room temperature. The material is hygroscopic and light-sensitive; exposure to moisture causes deliquescence and hydrolysis, irreversibly degrading precursor stoichiometry. Handle exclusively within an inert-atmosphere glovebox (H₂O < 1 ppm, O₂ < 1 ppm) and dissolve in anhydrous solvent immediately prior to use.
Methylammonium Bromide (CH₃NH₃Br, 99% purity) is a research-grade organohalide salt optimized as a bromide source for MAPbBr₃ and mixed-halide perovskite formulations. Its high purity and defined molecular weight enable reproducible stoichiometric tuning, but the material's hygroscopic and light-sensitive nature mandates strict inert-atmosphere handling and light-protected dry storage to prevent degradation.
Positive
- High purity >99% for reproducibility: The >99% purity minimizes extrinsic ionic impurities in perovskite thin films, supporting consistent device performance across experiments.
- Precise stoichiometric control: With a defined molecular weight of 111.97 g/mol, the precursor enables accurate tuning of bromide-iodide ratios in mixed-halide perovskite formulations.
Trade-offs
- Hygroscopic and light-sensitive storage: The material requires strict light-protected, dry, sealed storage under inert atmosphere at room temperature; exposure to moisture causes deliquescence and irreversible stoichiometric degradation.
- Inert-atmosphere handling required: Precursor solution preparation must be performed exclusively in a glovebox with H₂O < 1 ppm and O₂ < 1 ppm, using anhydrous solvent immediately prior to use.
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