Molybdenum trioxide, an advanced inorganic electronic material A genuinely versatile material used in solar cells, OLEDs, transistors, and batteries Overview | Product Information | MSDS | Literature | Related Products | Technical Support Molybdenum trioxide (CAS 1313-27-5) is a metal oxide with a chemical formula of MoO3. Owing to its low-lying conduction band, this material is a popular candidate for hole transport layer in OLEDs and solar cells. When incorporated as a diffusion-barrier layer within a MoOx/Cr/Al noble-metal-free electrode stack in perovskite solar cells, MoO3 (15 nm) deliveries a substantial improvement in PCE of 25.52% and FF of 85.48%. Molybdenum trioxide also effectively suppresses bi-directional ion diffusion and stabilizes the interface between perovskite and electrode. In 2D semiconductor transistors, the high-κ gate dielectric properties of molybdenum trioxide enable superior performance of current on/off ratio up to 7 × 107, low subthreshold swing (SS) of 78 mV/Dec, and low leakage current below 10-4 A/cm2 Molybdenum trioxide is commonly deposited via physical vapor deposition during device fabrication. A facile solution-processing route has also been developed, in which MoO3 is converted into a dark blue peroxomolybdic acid solution in alcohol using hydrogen peroxide. This solution can then be spin-coated onto the substrate and baked to yield the final MoO3 thin film. Hole Transport Material For OLEDs and perovskite solar cells Desirable Band Structure Improved device performance Simple Worldwide shipping Reliable delivery via tracked courier High Purity Metal Oxide 99.9% for effective performance General Information CAS Number 1313-27-5 Chemical Formula MoO3 Full Name Molybdenum (VI) oxide Molecular Weight 95.95 g/mol Melting Point 795°C Energy Level HOMO = −5.3 eV LUMO = −2.3 eV Synonyms Trioxomolybdenum, molybdenum oxide, molybdic trioxide Classification or Family Perovskite solar cell, Hole transport layers, Advanced ceramic materials, Metal oxides, inorganic electronic materials, perovskite interface materials, OLED Product Details Purity 99.9% Particle Size 20 nm Appearance Gray powder MSDS Documentation Molybdenum Trioxide MSDS Sheet Literature High-performance noble-metal-free perovskite solar cells enabled by MoOx/Cr/Al multilayer electrodes, W. Kim et al., Adv. Energy Mater., e70950 (2026); DOI: 10.1002/aenm.70950. A simple synthesis method to prepare a molybdenum oxide hole-transporting layer for efficient polymer solar cells, Y. Li et al., RSC Adv., 7, 7890 (2017); DOI: 10.1039/c7ra00303j. Evaporated organic–MoO3 composite hole transport layers toward stable perovskite solar cells, J. Hong et al., EES Sol., 1, 107 (2025); DOI: 10.1039/d4el00024b. Highly efficient organic solar cells enabled by ultraviolet-ozone treated molybdenum oxide hole transport layers, A. Panagiotopoulos et al., J. Mater. Chem. A, 13, 8774 (2025); DOI: 10.1039/d4ta07795d. Recent progress on high-efficiency perovskite/organic tandem solar cells, K. Wang et al., Nanomaterials, 15, 745 (2025); DOI: 10.3390/nano15100745. Single-crystalline hole-transporting layers for efficient and stable organic light-emitting devices, G.-D. Ye et al., Light: Science & Applications, 13, 136 (2024); DOI: 10.1038/s41377-024-01484-4. Balancing carrier transport in interconnection layer for efficient perovskite/organic tandem solar cells, Y. An et al., Nat. Commun., 16, 2759 (2025); DOI: 10.1038/s41467-025-58047-3. Controllable growth of MoO3 dielectrics with sub-1 nm equivalent oxide thickness for 2D electronics, X. Li et al., Nat. Commun., 16, 6758 (2025); DOI: 10.1038/s41467-025-61972-y. View more references Related Products Hole Transport Layer Materials Hole Transport Layer Materials Charge Transport Layer Materials Charge Transport Layer Materials Popular Materials Popular and New Materials