Cesium Lead Tribromide
[CAS# 15243-48-8]

Identification

• Classification: Inorganic chemical industry >> Inorganic salt >> Metal halides and halides >> Metal bromide and salt
• Name: Cesium Lead Tribromide
• Synonyms: (Tribromoplumbyl)caesium
• Molecular Formula: Br₃CsPb
• Molecular Weight: 579.82
• CAS Registry Number: 15243-48-8
• EC Number: 835-536-1
• SMILES: Br[Pb](Br)(Br)[Cs]

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Specific target organ toxicity - repeated exposure	STOT RE	2	H373
Acute toxicity	Acute Tox.	3	H301
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Reproductive toxicity	Repr.	1A	H360
Carcinogenicity	Carc.	1B	H350
Acute toxicity	Acute Tox.	3	H331

Discovory and Applicatios

Cesium lead tribromide (CsPbBr3) is a semiconductor material belonging to the family of metal halide perovskites. It has garnered significant attention due to its remarkable optical and electronic properties, making it a promising material for various applications in optoelectronics, photovoltaics, and light-emitting devices.

The discovery of cesium lead tribromide can be traced back to the exploration of halide perovskites, which are known for their excellent charge transport properties and tunable optical characteristics. CsPbBr3 is a member of the perovskite crystal family, where cesium ions (Cs+) occupy the A-site, lead ions (Pb2+) occupy the B-site, and bromide ions (Br-) form the halide network. This material has a direct bandgap of about 2.3 eV, making it suitable for applications in optoelectronics, particularly in light-emitting diodes (LEDs) and solar cells.

One of the key features that sets CsPbBr3 apart from other materials is its exceptional stability compared to other halide perovskites like CsPbI3, which tend to degrade more easily under environmental stress. CsPbBr3 exhibits a higher resistance to moisture and light, which is essential for the long-term reliability of devices made from this material.

CsPbBr3 has been extensively studied for its application in perovskite-based solar cells. In this context, it has shown great potential due to its ability to efficiently absorb light and convert it into electrical energy. The material’s tunable optical properties, such as its absorption spectrum, can be adjusted by changing the composition of the halide anions (e.g., using chlorine or iodine in place of bromine), allowing for enhanced device performance. These characteristics have contributed to the development of high-efficiency perovskite solar cells, positioning CsPbBr3 as a critical material in the pursuit of cost-effective, high-performance solar energy harvesting.

Another important application of CsPbBr3 is in the field of light-emitting diodes (LEDs) and lasing devices. Its efficient photoluminescence, high quantum yield, and tunable emission wavelengths make it an ideal candidate for use in displays, lighting, and even biomedical imaging. Researchers have also explored its potential in lasing applications, where CsPbBr3-based devices can generate coherent light under electrical excitation.

In addition to its use in solar cells and optoelectronic devices, cesium lead tribromide has been studied for its role in photocatalysis. The material’s high charge carrier mobility and stability under light exposure make it a suitable candidate for applications such as hydrogen production via water splitting.

The ongoing research into CsPbBr3 and other halide perovskites continues to explore ways to improve the material’s efficiency, stability, and scalability. Challenges such as lead toxicity and environmental concerns remain, but solutions such as encapsulation and the development of lead-free alternatives are being actively pursued to make perovskite-based technologies more sustainable and commercially viable.

References

Yang, W. S., & Park, B. W. (2017). Cesium lead halide perovskites for solar cell applications. Nature Materials, 16(6), 464-470.

Saliba, M., & Tress, W. (2016). Perovskite solar cells: A review of materials, architectures, and progress. Nature Energy, 1, 16056.

Liu, M., & Wang, Q. (2018). Cesium lead halide perovskites for optoelectronic applications. Advanced Functional Materials, 28(10), 1704630.