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Cesium carbonate

extra pure, Technipur®

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Dicesium carbonate, Carbonic acid dicesium
Linear Formula:
CAS Number:
Molecular Weight:
MDL number:

Quality Level


10-12 (20 °C, 50 g/L in H2O)


610 °C (dec.) (lit.)


4.07 g/cm3 at 20 °C

SMILES string




InChI key


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General description

Cesium carbonate (Cs2CO3) is widely used in electronic and optoelectronic industries because of its excellent electron injection capability and outstanding optical properties. It also possesses high solubility in polar solvents, therefore it can be used as a surface modification material in organic light-emitting diodes (OLEDs) and solar cells.


Cesium carbonate can be used as an additive in 4,7-diphenyl-1,10-phenanthroline (BPhen) based organic light-emitting diodes (OLEDs) to enhance the electrical characteristics and luminance efficiency of OLEDs by decreasing the activation energy of the organic layer as a result of increased electron injection and transport. In perovskite solar cells (PCSs) and other optoelectronic devices, Cs2CO3 is used as an effective modifier to improve their photoelectric conversion efficiency by reducing the barrier between interfaces and defects in electron transport layers which makes electron transfer easier.
Promotes the efficient O-alkylation of alcohols to form mixed alkyl carbonates.

Legal Information

Technipur is a registered trademark of Merck KGaA, Darmstadt, Germany


CorrosionHealth hazard

Signal Word


Hazard Statements

Hazard Classifications

Eye Dam. 1 - Repr. 2 - STOT RE 2 Oral

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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The role of cesium carbonate on the electron injection and transport enhancement in organic layer by admittance spectroscopy
Zhao J, et al.
Applied Physics Letters, 101, 193303-193303 (2012)
Cesium carbonate modified electron transport layer for improving the photoelectric conversion efficiency of planar perovskite solar cells
Lv C, et al.
Materials Science in Semiconductor Processing, 112, 105014-105014 (2020)
Development of an inorganic cesium carbonate-based electron transport material for a 17% power conversion efficiency perovskite solar cell device
Hossain MI, et al.
journal of photonics for energy, 10(1) (2020)
Purification and preparation of some caesium compounds
Simons EL
Talanta, 13(2) (1966)
Improved open-circuit voltage via Cs2CO3-Doped TiO2 for high-performance and stable perovskite solar cells
Zong H, et al.
Organic Electronics, 77, 105495-105495 (2020)

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