Lead(II) Bromide丨CAS 10031-22-8

Lead(II) bromide丨CAS 10031-22-8, is an inorganic halide compound consisting of lead in the +2 oxidation state and bromide ions. It appears as a white or pale yellow crystalline powder, sparingly soluble in water and more soluble in hot water or polar organic solvents. While it is toxic and must be handled with care due to its lead content, PbBr₂ has seen increasing interest in advanced materials, optoelectronics, and academic research due to its unique electrical and optical properties.

1. Perovskite Solar Cells and Optoelectronic Devices
One of the most exciting modern uses of lead(II) bromide is in the fabrication of lead halide perovskites, which are materials with the general formula ABX₃ (where A = organic cation, B = Pb²⁺, X = halide). PbBr₂ is a key precursor for perovskites like CH₃NH₃PbBr₃ (methylammonium lead bromide).
Applications include:
● Solar cells: Perovskite solar cells incorporating PbBr₂ show high power conversion efficiencies and enhanced stability compared to iodide-based analogs.
● Light-emitting diodes (LEDs): PbBr₂-based perovskites emit in the green to blue range and are used in quantum dot LEDs.
● Photodetectors and lasers: High charge mobility and tunable bandgaps make PbBr₂ perovskites suitable for photosensitive and light-emitting devices.
2. Scintillators and Radiation Detectors
PbBr₂ has been studied as a scintillation material for detecting ionizing radiation (e.g., X-rays and gamma rays).
● Its high atomic number (Z = 82 for lead) offers good stopping power for high-energy photons.
● It can emit visible light when struck by radiation, useful in medical imaging and nuclear physics experiments.
3. Crystal Growth Studies and Academic Research
Due to its relatively simple crystal structure and known phase transitions, PbBr₂ serves as a model compound in solid-state physics for studying:
● Ionic conductivity
● Phase transitions
● Crystal defects
● Dielectric properties
Its behavior under varying pressure and temperature conditions provides insight into crystal growth mechanics, particularly in halide systems.
4. Thermoelectric and Electrical Applications (Experimental)
Lead halides, including PbBr₂, are being explored for thermoelectric materials-where temperature gradients are converted into electrical voltage.
● While not widely commercialized, PbBr₂ exhibits some ionic conductivity at elevated temperatures.
● Research continues into potential solid-state ionic devices using PbBr₂.

1. Essential for Lead Halide Perovskites
Lead(II) bromide丨CAS 10031-22-8 is a critical raw material for bromide-based perovskites, which offer superior stability and optical properties compared to iodide counterparts.
2. Tunable Optical Properties
The bromide ion allows for bandgap tuning in perovskites, making PbBr₂-based materials ideal for blue and green light emission.
3. High Purity for Advanced Applications
Available in 99.99% purity or higher, PbBr₂ meets the quality standards for semiconductor and photovoltaic fabrication.
4. Radiation Detection Capability
Due to its heavy element composition and luminescent properties under radiation, PbBr₂ contributes to the development of compact, high-resolution scintillators.

Conclusion
Lead(II) bromide丨CAS 10031-22-8 is a compound of considerable scientific and technological interest, particularly as a precursor for perovskite semiconductors and radiation detectors. While its industrial use is constrained due to lead toxicity, its role in cutting-edge optoelectronics, solar energy research, and crystal physics continues to grow. With careful handling and stringent safety measures, PbBr₂ offers valuable benefits in high-performance material synthesis and device engineering.