{"product_id":"molybdenum-trioxide-moo3","title":"Molybdenum trioxide (MoO3)","description":"\u003ch2 id=\"product-oneliner\"\u003eMolybdenum trioxide, an advanced inorganic electronic material\u003c\/h2\u003e\n\u003cp class=\"text-center\"\u003eA genuinely versatile material used in solar cells, OLEDs, transistors, and batteries\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"text-center\"\u003e\u003ca href=\"#overview\"\u003eOverview\u003c\/a\u003e | \u003ca href=\"#product-information\"\u003eProduct Information\u003c\/a\u003e | \u003ca href=\"#related-products\"\u003eRelated Products\u003c\/a\u003e\n\u003c\/p\u003e\n\u003chr\u003e\n\u003cp id=\"overview\"\u003eMolybdenum trioxide (CAS number: 1313-27-5) is a metal oxide with a chemical formula of MoO\u003csub\u003e3\u003c\/sub\u003e. Owing to its low-lying conduction band, molybdenum trioxide is a popular candidate for hole transport layer in OLEDs and solar cells. When incorporated as a diffusion-barrier layer within a MoO\u003csub\u003ex\u003c\/sub\u003e\/Cr\/Al noble-metal-free electrode stack in perovskite solar cells, MoO\u003csub\u003e3\u003c\/sub\u003e (15 nm) deliveries a substantial improvement in PCE (power conversion efficiency) of 25.52% and FF (fill factor) 85.48%. Molybdenum trioxide also effectively suppresses bi-directional ion diffusion and stabilizes the interface between perovskite and electrode.\u003c\/p\u003e\n\u003cp\u003eIn 2D semiconductor transistors, the high-\u003cem\u003eκ\u003c\/em\u003e gate dielectric properties of molybdenum trioxide enable superior performance of current on\/off ratio up to 7 × 10\u003csup\u003e7\u003c\/sup\u003e, low subthreshold swing (SS) of 78 mV\/Dec, and low leakage current below 10\u003csup\u003e-4\u003c\/sup\u003e A\/cm\u003csup\u003e2\u003c\/sup\u003e\u003c\/p\u003e\n\u003cp\u003eMolybdenum trioxide is commonly deposited \u003cem\u003evia\u003c\/em\u003e physical vapor deposition during device fabrication. A facile solution-processing route has also been developed, in which MoO\u003csub\u003e3\u003c\/sub\u003e 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 MoO\u003csub\u003e3\u003c\/sub\u003e thin film.\u003c\/p\u003e\n\u003cdiv class=\"row display-flex\"\u003e\n\n\u003cdiv class=\"col-xs-12 col-md-3 text-center margin-top\"\u003e\n\u003cimg alt=\"\" height=\"50\" loading=\"lazy\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/Icon_Versitile.svg\" width=\"50\"\u003e\n\u003cp class=\"blue-heading no-margin text-center\"\u003eAn hole transposrt material\u003c\/p\u003e\n\u003cp class=\"text-center\"\u003eWidely used in OLEDs and perovskite solar cells\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"col-xs-12 col-md-3 text-center margin-top\"\u003e\n\u003cimg alt=\"\" height=\"50\" loading=\"lazy\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/Ossila_Guarantee_Icons_Quality_Assured.svg\" width=\"50\"\u003e\n\u003cp class=\"blue-heading no-margin text-center\"\u003eDesirable band structure\u003c\/p\u003e\n\u003cp class=\"text-center\"\u003eImprove device performance\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"col-xs-12 col-md-3 text-center margin-top\"\u003e\n\u003cimg alt=\"\" height=\"50\" loading=\"lazy\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/2D-Materials-Icons_-Free_ish_Shipping.svg\" width=\"50\"\u003e\n\u003cp class=\"blue-heading no-margin text-center\"\u003eWorldwide shipping\u003c\/p\u003e\n\u003cp class=\"text-center\"\u003eQuick and reliable shipping\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"col-xs-12 col-md-3 text-center margin-top\"\u003e\n\u003cimg alt=\"High purity\" height=\"50\" loading=\"lazy\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/2D-Materials-Icons_-Purity.svg\" width=\"50\"\u003e\n\u003cp class=\"blue-heading no-margin text-center\"\u003eHigh Purity\u003c\/p\u003e\n\u003cp class=\"text-center\"\u003e99.9% pure\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"product-information\"\u003eGeneral Information\u003c\/h2\u003e\n\u003chr\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eCAS Number\u003c\/th\u003e\n\u003ctd\u003e1313-27-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eChemical Formula\u003c\/th\u003e\n\u003ctd\u003eMoO\u003csub\u003e3\u003c\/sub\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eFull Name\u003c\/th\u003e\n\u003ctd\u003eMolybdenum (VI) oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eMolecular Weight\u003c\/th\u003e\n\u003ctd\u003e95.95 g\/mol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eMelting Point\u003c\/th\u003e\n\u003ctd\u003e795°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eEnergy Level\u003c\/th\u003e\n\u003ctd\u003e\n\u003cp\u003eHOMO = −5.3 eV\u003c\/p\u003e\n\u003cp class=\"no-margin\"\u003eLUMO = −2.3 eV\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eSynonyms\u003c\/th\u003e\n\u003ctd\u003eTrioxomolybdenum, molybdenum oxide, molybdic trioxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eClassification or Family\u003c\/th\u003e\n\u003ctd\u003ePerovskite solar cell, Hole transport layers, Advanced ceramic materials, Metal oxides, inorganic electronic materials, perovskite interface materials, OLED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003chr\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003ePurity\u003c\/th\u003e\n\u003ctd\u003e99.9%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eParticle Size\u003c\/th\u003e\n\u003ctd\u003e20 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eAppearance\u003c\/th\u003e\n\u003ctd\u003eGray powder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eMSDS Documentation\u003c\/h2\u003e\n\u003chr\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/downloads.ossila.com\/msds\/molybdenum-trioxide-moo3.pdf\" title=\"Molybdenum Trioxide MSDS Sheet\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\u003cimg alt=\"Molybdenum Trioxide MSDS Sheet\" class=\"msds-icon\" height=\"38.672\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/0287\/files\/product-downloads-msds.svg\" width=\"30\"\u003eMolybdenum Trioxide MSDS Sheet\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2\u003eReferences\u003c\/h2\u003e\n\u003chr\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eHigh-performance noble-metal-free perovskite solar cells enabled by MoO\u003csub\u003ex\u003c\/sub\u003e\/Cr\/Al multilayer electrodes\u003c\/em\u003e, W. Kim et al., Adv. Energy Mater., e70950 (2026); DOI: 10.1002\/aenm.70950.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eA simple synthesis method to prepare a molybdenum oxide hole-transporting layer for efficient polymer solar cells\u003c\/em\u003e, Y. Li et al., RSC Adv., 7, 7890 (2017); DOI: 10.1039\/c7ra00303j.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eEvaporated organic–MoO3 composite hole transport layers toward stable perovskite solar cells\u003c\/em\u003e, J. Hong et al., EES Sol., 1, 107 (2025); DOI: 10.1039\/d4el00024b.\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\u003cdiv id=\"references\" class=\"expandable\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eHighly efficient organic solar cells enabled by ultraviolet-ozone treated molybdenum oxide hole transport layers\u003c\/em\u003e, A. Panagiotopoulos et al., J. Mater. Chem. A, 13, 8774 (2025); DOI: 10.1039\/d4ta07795d.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eRecent progress on high-efficiency perovskite\/organic tandem solar cells\u003c\/em\u003e, K. Wang et al., Nanomaterials, 15, 745 (2025); DOI: 10.3390\/nano15100745.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eSingle-crystalline hole-transporting layers for efficient and stable organic light-emitting devices\u003c\/em\u003e, G.-D. Ye et al., Light: Science \u0026amp; Applications, 13, 136 (2024); DOI: 10.1038\/s41377-024-01484-4.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eBalancing carrier transport in interconnection layer for efficient perovskite\/organic tandem solar cells\u003c\/em\u003e, Y. An et al., Nat. Commun., 16, 2759 (2025); DOI: 10.1038\/s41467-025-58047-3.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eControllable growth of MoO3 dielectrics with sub-1 nm equivalent oxide thickness for 2D electronics\u003c\/em\u003e, X. Li et al., Nat. Commun., 16, 6758 (2025); DOI: 10.1038\/s41467-025-61972-y.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cbutton type=\"button\" class=\"anchor expand-link\" data-expand-target=\"references\" data-toggle-text=\"Hide references\"\u003eView more references\u003c\/button\u003e\n\n\u003ch2 id=\"related-products\"\u003eRelated Products\u003c\/h2\u003e\n\u003chr\u003e\n\u003cp\u003eWe stock a wide range of hole transport materials available to purchase online. Please \u003ca href=\"https:\/\/www.ossila.com\/pages\/contact-us\" title=\"Contact Us\"\u003econtact us\u003c\/a\u003e if you cannot find what you are looking for.\u003c\/p\u003e\n\n\u003cdiv class=\"collection-container\"\u003e\n\u003c!--First collection--\u003e\n\u003cdiv class=\"collection-tile\"\u003e\n\u003ca href=\"https:\/\/www.ossila.com\/collections\/hole-transport-layer-materials\"\u003e\n\u003cdiv class=\"collection-button background-light-blue\"\u003e\n\u003cimg width=\"150\" height=\"109.266\" alt=\"Hole Transport Layer Materials\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/0287\/files\/collection-link-Electron-Hole-Transport-Layer.png\"\u003e\n\u003cp\u003eHole Transport Layer Materials\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.ossila.com\/collections\/hole-transport-layer-materials\"\u003eHole Transport Layer Materials\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!--Second collection--\u003e\n\u003cdiv class=\"collection-tile\"\u003e\n\u003ca href=\"https:\/\/www.ossila.com\/collections\/transport-layer-materials\"\u003e\n\u003cdiv class=\"collection-button background-light-blue\"\u003e\n\u003cimg alt=\"Charge Transport Layer Materials\" height=\"109.266\" loading=\"lazy\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/collection-link-Electron-Hole-Transport-Layer.png\" width=\"150\"\u003e\n\u003cp\u003eCharge Transport Layer Materials\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.ossila.com\/collections\/transport-layer-materials\"\u003eCharge Transport Layer Materials\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!--Third collection--\u003e\n\u003cdiv class=\"collection-tile\"\u003e\n\u003ca href=\"\/collections\/materials\"\u003e\n\u003cdiv class=\"collection-button background-ossila-blue\"\u003e\n\u003cimg alt=\"Popular and new material collection\" height=\"109.266\" loading=\"lazy\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/collection-link-popular-materials.png\" width=\"150\"\u003e\n\u003cp\u003ePopular Materials\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/materials\"\u003ePopular and New Materials\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Ossila","offers":[{"title":"25 g","offer_id":51934349230296,"sku":"M2700A1-25g","price":98.0,"currency_code":"USD","in_stock":true},{"title":"50 g","offer_id":51934349263064,"sku":"M2700A1-50g","price":150.0,"currency_code":"USD","in_stock":true},{"title":"100 g","offer_id":51934349295832,"sku":"M2700A1-100g","price":240.0,"currency_code":"USD","in_stock":true},{"title":"250 g","offer_id":51934349328600,"sku":"M2700A1-250g","price":480.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0287\/files\/m2700a1-25g-vial-product-photo.jpg?v=1785853996","url":"https:\/\/www.ossila.com\/products\/molybdenum-trioxide-moo3","provider":"Ossila","version":"1.0","type":"link"}