Cesium Iodide, CAS No. 7789-17-5

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7789-17-5

Catalog No. EBD1675076

CAS 7789-17-5

Name Cesium Iodide

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Basic Information

Synonyms: Cesiumiodidewhitextl caesiumiodide Cesiumiodide(99%Cs) Cesiumiodide(99.999%Cs)PURATREM Cesiumiodide Cesiumiodide(99.9%Cs) cesiumiodine cesiummonoiodide dicesiumdiiodide cesiumiodide(csi) tricesiumtriiodide cesiumiodide(cs2i2) cesiumiodide(cs3i3)

Molecular Formula: CsI

Molecular Weight: 259.81

MDL Number: MFCD00010962

Categories: Materials Chemistry > Optoelectronic and Organic Semiconductor Materials > Perovskite and PSC Material Precursors Synthetic Chemistry > Basic Synthetic Reagents > Inorganic Compounds and Metal Salts

Product Description:

Cesium iodide (CsI) is an inorganic compound with the chemical formula CsI. It is a white, crystalline, hygroscopic solid that is highly soluble in water. It is a simple ionic salt composed of cesium cations (Cs⁺) and iodide anions (I⁻). Its primary and most significant modern application is in the field of materials science, specifically as a crucial precursor for the fabrication of perovskite solar cells (PSCs). It is used to synthesize cesium lead iodide (CsPbI₃) or as a component in mixed-cation (e.g., FA/MA/Cs) perovskite formulations. Incorporating cesium iodide enhances the thermal and phase stability of the perovskite layer, which is critical for improving the device's long-term performance and commercial viability. It is also historically important as a scintillation material in radiation detection (e.g., in X-ray image intensifiers and gamma-ray spectroscopy) due to its high density and efficient light yield. As a source of both cesium and iodide ions, it serves as a fundamental inorganic reagent in synthetic chemistry and materials research. It must be handled with care due to its hygroscopic nature, and appropriate storage in a dry environment is essential to maintain its purity for sensitive applications like perovskite deposition.

Physical Properties

Melting Point: 626 °C(lit.)

Boiling Point: 1280 °C

Flash Point: 1280°C

Density: 4.51 g/mL at 25 °C(lit.)

Solubility: 74 g/100 mL (20 ºC)

Refractivity: 1.7876

Analytical Data

Appearance: white crystalline powder