METHYLAMMONIUM IODIDE CH₃NH₃I 99% CAS 14965-49-2RESEARCH GRADE MATERIAL
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TAILORED SOLUTIONS FOR RESEARCH
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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Methylammonium iodide is strongly hygroscopic and light-sensitive, requiring storage in sealed, light-protected containers under inert atmosphere to prevent deliquescence and hydrolysis. Degradation from moisture exposure irreversibly alters precursor stoichiometry, necessitating handling in a glovebox with H2O and O2 below 1 ppm for solution preparation.
- Storage environment: Store at room temperature in a light-protected, moisture-free environment, sealed under inert atmosphere.
- Incompatible materials: Do not store together with strong oxidizing agents or strong acids.
- Post-use sealing: Tighten the container cap immediately after each use to prevent moisture ingress.
- Glovebox requirement: Handle the crystalline solid only inside an inert-atmosphere glovebox when preparing precursor solutions.
- Personal protective equipment: Wear protective gloves throughout all experimental procedures to avoid direct skin contact.
This protocol describes the safe handling and storage of hygroscopic methylammonium iodide to prevent moisture-induced degradation. Steps include immediate transfer to controlled storage, glovebox use, and immediate resealing after each use.
Required Equipment: Inert-atmosphere glovebox (H2O < 1 ppm, O2 < 1 ppm), Protective gloves, Light-protective desiccated storage container
- Transfer to storage
Transfer the material immediately upon receipt to a desiccated, light-protected storage environment. - Don protective gloves
Wear protective gloves throughout all experimental procedures to avoid direct skin contact. - Handle in glovebox
When preparing precursor solutions, handle the crystalline solid inside an inert-atmosphere glovebox with H2O and O2 below 1 ppm. - Reseal container
After each use, immediately tighten the container cap to prevent moisture ingress.
How does the >99% purity of methylammonium iodide affect perovskite solar cell device performance?
The >99% purity minimizes extrinsic ionic defects in perovskite thin films, supporting reproducible device performance across spin-coating, vacuum evaporation, and solution-based fabrication workflows. Low batch impurity content reduces non-radiative recombination pathways, which is critical for achieving high open-circuit voltage and power conversion efficiency in MAPbI₃ and mixed-cation mixed-halide perovskite solar cells.
What solvent systems are compatible with methylammonium iodide for precursor solution preparation?
Methylammonium iodide is freely soluble in water, N,N-dimethylformamide (DMF), and dimethyl sulfoxide (DMSO), with additional solubility in methanol and isopropanol. This broad solvent compatibility enables flexible precursor formulation for one-step spin-coating, two-step sequential deposition, vacuum thermal evaporation, and solution-based synthetic routes. DMF and DMSO are preferred for controlled crystallization in high-efficiency perovskite films.
What are the critical storage and handling requirements for methylammonium iodide to prevent degradation?
Methylammonium iodide is strongly hygroscopic and light-sensitive. It must be stored sealed under inert atmosphere, protected from light, at room temperature in a dry environment. Upon receipt, transfer immediately to a desiccated, light-protected container. For precursor preparation, handle inside an inert-atmosphere glovebox with H₂O < 1 ppm and O₂ < 1 ppm to prevent moisture-induced deliquescence and hydrolysis, which irreversibly degrade precursor stoichiometry.
Methylammonium Iodide (CH₃NH₃I, 99% purity) is a high-purity perovskite precursor with broad solvent compatibility, but its strong hygroscopicity mandates strict inert-atmosphere handling and light-protected storage to prevent moisture-induced degradation.
Positive
- Ultra-high purity >99%: Refined to >99% purity with low batch impurity content minimizes extrinsic ionic defects in perovskite thin films, supporting reproducible device performance across spin-coating, vacuum evaporation, and solution-based fabrication workflows.
- Broad solvent compatibility: Excellent solubility in water, DMF, DMSO, methanol, and isopropanol enables flexible precursor solution formulation across a wide range of perovskite deposition protocols.
Trade-offs
- Strong hygroscopicity and light sensitivity: The material is strongly hygroscopic and light-sensitive; exposure to atmospheric moisture causes deliquescence and hydrolysis, irreversibly degrading precursor stoichiometry. Requires sealed, inert-atmosphere, light-protected storage at room temperature.
- Strict handling infrastructure required: Precursor solution preparation must be performed in an inert-atmosphere glovebox (H₂O < 1 ppm, O₂ < 1 ppm). Immediate transfer to desiccated, light-protected environment upon receipt is necessary to prevent moisture ingress.
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