Tungsten Oxide Powder

CAS Number 1314-35-8

Charge Transport Layer Materials, Electron Transport Layer Materials, Inorganic Electronic Materials, Metal Oxides, Perovskite Materials

MSDS

An electrochromic metal oxide powder

used in photocatalytic reaction and solar cells, WO₃

Overview | Product Information | Related Products

Tungsten oxide (CAS number 1314-35-8), also known as tungsten trioxide, is a metal oxide with a monoclinic crystal structure. Tungsten oxide is a well-known material for use in electrochromic glass (also referred to smart windows), as its transparency changes upon the application of voltage. The electrochromism occurs when the photons are absorbed in the tungsten oxide layer, causing electrons to move between nearby metal ions, after W⁶⁺ receives electrons from the electrodes.

Tungsten oxide has also found its application in perovskite solar cells, as an interfacial passivation layer. Tungsten oxide suppresses the charge recombination in solar cells, leading to an improved power conversion efficiency (PCE) of 14.7%, compared to PCE of 9.75% without tungsten oxide.

Tungsten oxide is also used in photocatalysis for the 100% selective formation of formaldehyde from methane and water.

An electrochromic material

changes on transparency with applied voltage

Multifunctional

used in solar cells and photocatalysis

Worldwide shipping

Quick and reliable shipping

High Purity

99.9% pure

General Information

CAS Number	1314-35-8
Chemical Formula	WO₃
Full Name	Tungsten trioxide
Molecular Weight	231.84 g/mol
Melting Point	1473 °C
Synonyms	Trioxotungsten, Tungsten (VI) oxide
Classification or Family	Photocatalysis, Perovskite solar cell, Electron transport layer, Interfacial passivation layer

Product Details

Purity	99.9%
Particle Size	80 – 100 nm
Appearance	Yellow powder

MSDS Documentation

Tungsten Oxide MSDS Sheet

References

Tungsten oxide single crystal nanosheets for enhanced multichannel solar light harvesting, J. Yan et al., Adv. Mater., 27, 1580–1586 (2015); DOI: 10.1002/adma.201404792.
Tungsten trioxide nanoplate array supported platinum as highly efficient counter electrode for dye-sensitized solar cells, D. Song et al., Nanoscale, 7, 5712–5718 (2015); DOI: 10.1039/C4NR06787H.
Direct photoelectrochemical oxidation of hydroxymethylfurfural on tungsten trioxide photoanodes, C. Lhermitte et al., RSC Adv., 11, 198 (2021); DOI: 10.1039/d0ra09989a.

Efficient and stable perovskite solar cells using the tungsten trioxide as an interfacial passivation layer, M. Mohammed et al., Materials Letters, 310, 131518 (2022); DOI: 10.1016/j.matlet.2021.131518.
Fullerene modification of WO₃ electron transport layer toward high‐efficiency MA‐free perovskite solar cells with eliminated light‐soaking effect, Interdiscip. Mater., 2, 459–469 (2023); DOI: 10.1002/idm2.12089.
Insight into selectivity of photocatalytic methane oxidation to formaldehyde on tungsten trioxide, Y. Fan et al., Nat. Commun., 15, 4679 (2024); DOI: 10.1038/s41467-024-49138-8.

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