Formamidinium Bromide FABr 99% Perovskite Salt ATOMFAIR®

FORMAMIDINIUM BROMIDE CH₃BRN₂ 99% FABR CAS 146958-06-7

RESEARCH GRADE MATERIAL

Product Overview

Formamidinium Bromide (CH₃BrN₂, FABr, CAS 146958-06-7) is a bromine-based formamidinium perovskite precursor with CH₃BrN₂ 99% purity FABr, supplied as a white crystalline solid with a molecular weight of 124.97 g/mol. This high-purity organohalide salt is primarily employed for preparing bromide-containing formamidinium-based hybrid perovskite thin films, serving as an essential perovskite bandgap tuning precursor that enables precise adjustment of the perovskite bandgap width and optimization of device optoelectronic performance. By controlling the bromide-iodide ratio in mixed-halide FA-based formulations, researchers can systematically engineer absorption onset and emission wavelength for specific photovoltaic and light-emitting applications. The material is widely utilized in university and research institute laboratories for photovoltaic cell, photodetector, and light-emitting device experimental research. Compatible with mainstream thin-film processing techniques including spin-coating and solution blending, this precursor requires strict light-sensitive hygroscopic dry storage to maintain stoichiometric integrity.

Technical Specifications

PARAMETER	DETAILS
Molecular Formula	CH₃BrN₂
CAS Number	146958-06-7
Molecular Weight	124.97 g/mol
Specification	10 g
Purity	>99%
Physical Form	White Crystalline Solid
Storage Conditions	Light-Protected, Dry, Sealed, Room Temperature
Custom Configurations	Other packaging specifications are available upon request. Please contact us via email for custom orders.

Key Features & Advantages

Precise Bandgap Engineering via Bromide Incorporation: FABr serves as the bromide source for mixed-halide FAPb(I₁₋ₓBrₓ)₃ perovskite formulations, enabling systematic bandgap tuning from approximately 1.48 eV to 2.23 eV for tandem solar cells, semi-transparent devices, and wavelength-specific photodetectors.
Enhanced Phase Stability in Formamidinium-Based Perovskites: Bromide incorporation into FA-based perovskite compositions stabilizes the photoactive α-phase cubic perovskite structure, suppressing the undesirable hexagonal δ-phase transition that limits pure FAPbI₃ device performance.
Ultra-High Purity Exceeding 99%: The formamidinium bromide is refined to >99% purity with low batch impurity content, minimizing extrinsic ionic defects in mixed-halide perovskite thin films and supporting reproducible device performance across experimental batches.
Room Temperature Storage Convenience: The material is stored at room temperature under light-protected, dry, sealed conditions, simplifying laboratory inventory management without requiring refrigeration or freezing equipment.

APPLICATION SCOPE: Primary bromide source for mixed-halide FAPb(I₁₋ₓBrₓ)₃ perovskite formulations enabling bandgap engineering in high-efficiency single-junction and tandem solar cells. Essential precursor for wide-bandgap perovskite top cells in perovskite-silicon tandem architectures. Compatible with one-step spin-coating, two-step sequential deposition, and solution blending protocols. Supports perovskite light-emitting diode and photodetector research requiring bromide-tuned emission and absorption characteristics. Widely adopted in university and research institute laboratories for formamidinium-based optoelectronic device development.

PACKAGING: This listing is for the 10 g specification. Other packaging weights are available upon custom request. Each package is sealed under inert atmosphere within light-protective packaging to prevent photodegradation and moisture ingress. The hygroscopic nature of formamidinium bromide necessitates immediate transfer to a desiccated, light-protected storage environment upon receipt. For bulk quantities or custom packaging specifications, please contact us via email.

IMPORTANT NOTICE: Formamidinium bromide is hygroscopic and light-sensitive. Tighten the container cap immediately after each use to prevent moisture ingress from ambient air. Wear protective gloves throughout all experimental procedures to avoid direct skin contact. Store in a light-protected, moisture-free environment; do not store together with strong oxidizing agents or acidic reagents. Exposure to atmospheric moisture will cause deliquescence and hydrolysis, irreversibly degrading precursor stoichiometry. When preparing precursor solutions, handle the white crystalline solid within an inert-atmosphere glovebox (H₂O < 1 ppm, O₂ < 1 ppm). For detailed safety and handling information, consult the Safety Data Sheet prior to use.

TAILORED SOLUTIONS FOR RESEARCH

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Manufacturer: Atomfair LLC

Brand: ATOMFAIR®

Formamidinium bromide is hygroscopic and light-sensitive, requiring storage in a dry, light-protected, sealed container at room temperature. Handling must be performed in an inert-atmosphere glovebox with H₂O and O₂ levels below 1 ppm to prevent deliquescence and hydrolysis.

Moisture Sensitivity: Exposure to atmospheric moisture causes deliquescence and hydrolysis, irreversibly degrading precursor stoichiometry.
Light Sensitivity: The material is light-sensitive and must be stored in light-protective packaging to prevent photodegradation.
Inert Atmosphere Requirement: All handling and solution preparation must be conducted inside an inert-atmosphere glovebox with H₂O < 1 ppm and O₂ < 1 ppm.
Incompatible Storage: Do not store together with strong oxidizing agents or acidic reagents to avoid hazardous reactions.
Post-Use Sealing: Tighten the container cap immediately after each use to prevent moisture ingress from ambient air.

HowTo

Formamidinium bromide is a hygroscopic and light-sensitive perovskite precursor that requires strict moisture and light protection. The following steps outline safe handling and storage procedures to maintain material integrity.

Required Equipment: Inert-atmosphere glovebox, Light-protective sealed container

Transfer to Storage
Transfer the received package immediately to a desiccated, light-protected storage environment.
Prepare Glovebox Environment
Place the container inside an inert-atmosphere glovebox with H₂O < 1 ppm and O₂ < 1 ppm before opening.
Seal After Use
Tighten the container cap immediately after each use to prevent moisture ingress.
Store Properly
Store the container in a light-protected, moisture-free environment, away from strong oxidizing agents and acidic reagents.

FAQ

What bandgap range can be achieved by incorporating Formamidinium Bromide into FAPb(I₁₋ₓBrₓ)₃ perovskite formulations?

Formamidinium Bromide enables systematic bandgap tuning from approximately 1.48 eV to 2.23 eV in mixed-halide FAPb(I₁₋ₓBrₓ)₃ perovskites. This range supports applications in tandem solar cells, semi-transparent devices, and wavelength-specific photodetectors by precisely controlling the bromide-iodide ratio.

How does Formamidinium Bromide improve phase stability in FA-based perovskites?

Bromide incorporation into FA-based perovskite compositions stabilizes the photoactive α-phase cubic perovskite structure and suppresses the undesirable hexagonal δ-phase transition that limits pure FAPbI₃ device performance. This phase stabilization is critical for maintaining device efficiency and operational stability.

What are the critical storage and handling requirements for Formamidinium Bromide to prevent degradation?

Formamidinium Bromide is hygroscopic and light-sensitive; it must be stored in a light-protected, dry, sealed container at room temperature. For solution preparation, handle the white crystalline solid inside an inert-atmosphere glovebox with H₂O < 1 ppm and O₂ < 1 ppm to prevent deliquescence and hydrolysis that irreversibly degrade precursor stoichiometry.

Assessment

Formamidinium Bromide (FABr, >99% purity) is a bromine-based perovskite precursor for bandgap engineering in mixed-halide FA-based formulations, enabling systematic tuning from 1.48 eV to 2.23 eV while stabilizing the photoactive α-phase. Its hygroscopic and light-sensitive nature mandates inert-atmosphere glovebox handling and light-protected storage to maintain stoichiometric integrity.

Positive

Precise Bandgap Tuning via Bromide Incorporation: FABr enables systematic bandgap engineering from ~1.48 eV to ~2.23 eV in mixed-halide FAPb(I₁₋ₓBrₓ)₃ perovskites, critical for tandem solar cells and wavelength-specific photodetectors.
Enhanced α-Phase Stability in FA Perovskites: Bromide incorporation suppresses the undesirable hexagonal δ-phase transition, stabilizing the photoactive cubic perovskite structure for improved device performance.

Trade-offs

Strict Moisture Sensitivity Requires Glovebox Handling: The material is hygroscopic and deliquescent; precursor solution preparation must be performed in an inert-atmosphere glovebox (H₂O < 1 ppm, O₂ < 1 ppm) to prevent irreversible hydrolysis and stoichiometric degradation.
Light-Sensitive Degradation During Storage: FABr requires light-protected, dry, sealed storage at room temperature; exposure to ambient light or moisture causes photodegradation and deliquescence, compromising purity.

Quality Standards & Performance Verification

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To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.

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