{"product_id":"bras","title":"BrMeOPh-4PACz","description":"\u003ch2 id=\"product-oneliner\"\u003eSelf-Assembled Monolayer for High Efficiency Perovskite Solar Cells\u003c\/h2\u003e\n\u003cp class=\"text-center\"\u003eUniform coverage of self-assembled molecules for efficient charge transport, BrAs, CAS No. 3053380-37-0\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"text-center\"\u003e\u003ca href=\"#specifications\"\u003eProduct Information\u003c\/a\u003e | \u003ca href=\"#msds\"\u003eMSDS\u003c\/a\u003e | \u003ca href=\"#literature\"\u003eLiterature\u003c\/a\u003e | \u003ca href=\"#related-products\"\u003eRelated Products\u003c\/a\u003e | \u003ca href=\"#technical-support\"\u003eTechnical Support\u003c\/a\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eBrMeOPh-4PACz is a self-assembled monolayer material developed as a hole selection layer interface for highly efficient and stable perovskite solar cells. This molecule features an unsymmetric structure with a 3-bromo-6-(4-methoxyphenyl)-9H-carbazolyl terminal, a phosphonic acid anchor and butyl linker. The asymmetric large dipole (4.72 \u003cem\u003eD\u003c\/em\u003e) in BrMeOPh-4PACz, established by the electron-accepting bromine and electron-donating methoxyphenyl, reorientates the carbazole terminal and strengthens the short-range Coulomb interactions. This results in a more densely packed self-assembled monolayer film with a uniform coverage of self-assembled molecules for efficient charge transport. In addition, the introduction of the bromine on one side of the carbazole terminal reduces the valence band offset while maintains the wettability by keeping a methoxyphenyl group on the other side.\u003c\/p\u003e\n\u003cp\u003eThe donor–acceptor interface imposed by the bromine and methoxyphenyl substituents promotes ultrafast energy transfer to improve thermal carrier extraction and minimize energy loss, resulting in good photostability. With the lattice-matching N-hydroxyethyl phthalimide (PIE) molecules to release the compressive stress and stabilize the buried interface, BrMeOPh-4PACz-PIE based perovskite device demonstrates a power conversion efficiency of 27.28% (certified: 27.19%) and retains over 95% of the initial efficiency after 1,500 hours of illumination under 1-sun light-soaking.\u003c\/p\u003e\n\u003cp\u003eServing as a hole selective contact for organic solar cells and perovskite solar cells, BrMeOPh-4PACz is an alternative to \u003ca href=\"https:\/\/www.ossila.com\/collections\/pedot\" title=\"pedot:pss\" rel=\"noopener\" target=\"_blank\"\u003ePEDOT:PSS\u003c\/a\u003e with superior performance and the convenience of solution deposition at low concentration, i.e. 1 mM.\u003c\/p\u003e\n\u003ch2 id=\"specifications\"\u003eGeneral Information\u003c\/h2\u003e\n\u003chr\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eCAS Number\u003c\/th\u003e\n\u003ctd\u003e3053380-37-0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eChemical Formula\u003c\/th\u003e\n\u003ctd\u003eC\u003csub\u003e23\u003c\/sub\u003eH\u003csub\u003e23\u003c\/sub\u003eBrNO\u003csub\u003e4\u003c\/sub\u003eP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eMolecular Weight\u003c\/th\u003e\n\u003ctd\u003e488.32 g\/mol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eAbsorption*\u003c\/th\u003e\n\u003ctd\u003eλ\u003csub\u003emax\u003c\/sub\u003e 288 nm (in film)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eFluorescence\u003c\/th\u003e\n\u003ctd\u003eλ\u003csub\u003eem\u003c\/sub\u003e (n.a.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eHOMO\/LUMO\u003c\/th\u003e\n\u003ctd\u003eHOMO = -5.23 eV, LUMO = -0.99 eV (DFT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eSynonyms\u003c\/th\u003e\n\u003ctd\u003eBrAs, (4-(3-bromo-6-(4-methoxyphenyl)-9H-carbazol-9-yl)butyl)phosphonic acid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eClassification or Family\u003c\/th\u003e\n\u003ctd\u003eCarbazole derivatives, Self-assembly monolayers, Hole transport layer, Hole selection layer,\u003cem\u003e p-i-n\u003c\/em\u003e Perovskite solar cells\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\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003ePurity\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 98% (HPLC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eMelting Point\u003c\/th\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eAppearance\u003c\/th\u003e\n\u003ctd\u003eOff-white powder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"panel panel-default\"\u003e\n\u003cdiv class=\"panel-body\"\u003e\n\u003ch3\u003eSolution Processing Procedure\u003c\/h3\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cem\u003eTypical processing solvents:\u003c\/em\u003e Methanol, ethanol\u003cbr\u003e\u003cem\u003eTypical suggested concentration: \u003c\/em\u003e1.0 mg\/ml or 1.0 mM\u003cbr\u003e\u003cem\u003eTypical processing procedure: BrMeOPh-4PACz\u003c\/em\u003e solution (1.0 mM) in methanol is spin-coated onto a clean and  ultraviolet-treated FTO substrate surface for 30 s at the speed of 2000 rpm, followed by annealing for 10 min at 100 ℃. PIE solution in IPA is spin-coated for 30 s at 5000 rpm then annealed for10 min at 100 ℃ (from perovskite films and solar cell fabrication, \u003ca href=\"https:\/\/www.nature.com\/articles\/s41566-025-01827-6\" title=\"brmeoph-4pacz\" rel=\"noopener\" target=\"_blank\"\u003eDOI: 10.1038\/s41566-025-01827-6\u003c\/a\u003e).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eChemical Structure\u003c\/h2\u003e\n\u003chr\u003e\n\u003cfigure\u003e\u003ca href=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/BrAs-3053380-37-0-chemical-structure-body.png\" title=\"BrMeOPh-4PACz chemical structure\" target=\"_blank\"\u003e \u003cimg width=\"320\" height=\"240\" loading=\"lazy\" alt=\"BrMeOPh-4PACz chemical structure\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/BrAs-3053380-37-0-chemical-structure-body.png?height=240\"\u003e \u003c\/a\u003e\n\u003cfigcaption\u003eBrMeOPh-4PACz Chemical Structure, CAS No. 3053380-37-0\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003ch2 id=\"msds\"\u003eMSDS Documentation\u003c\/h2\u003e\n\u003chr\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/downloads.ossila.com\/msds\/bras.pdf\" title=\"BrMeOPh-4PACz MSDS Sheet\" target=\"_blank\"\u003e\u003cimg alt=\"BrMeOPh-4PACz MSDS Sheet\" class=\"msds-icon\" height=\"39\" loading=\"lazy\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/product-downloads-msds.svg\" width=\"30\"\u003eBrMeOPh-4PACz MSDS Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 id=\"literature\"\u003eLiterature and Reviews\u003c\/h2\u003e\n\u003chr\u003e\n\u003col\u003e\n\u003cli\u003eC. Tian et al. (2026), \u003cem\u003ePhotostable donor–acceptor interface for minimizing energy loss in inverted perovskite solar cells, \u003c\/em\u003eNat. Photon., 20, 287–295; \u003ca href=\"https:\/\/www.nature.com\/articles\/s41566-025-01827-6\" title=\"brmeoph-4pacz\" rel=\"noopener\" target=\"_blank\"\u003eDOI: 10.1038\/s41566-025-01827-6\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 id=\"related-products\"\u003eRelated Products\u003c\/h2\u003e\n\u003chr\u003e\n\u003cp\u003e[[collection handle=\"self-assembled-monolayers\" limit=\"5\"]]\u003c\/p\u003e\n\u003cdiv class=\"collection-container\"\u003e\n\u003cdiv class=\"collection-tile\"\u003e\u003ca href=\"https:\/\/www.ossila.com\/collections\/self-assembled-monolayers\"\u003e\n\u003cdiv class=\"collection-button background-light-blue\"\u003e\n\u003cimg width=\"150\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/self-assembled-monolayers-collection-design.png?width=150\" loading=\"lazy\" height=\"109\" alt=\"Self-Assembled Monolayers (SAMs)\"\u003e\n\u003cp\u003e\u003cstrong\u003eSelf-Assembled\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eMonolayers\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"collection-tile\"\u003e\u003ca href=\"https:\/\/www.ossila.com\/collections\/perovskite-materials\"\u003e\n\u003cdiv class=\"collection-button background-ossila-blue\"\u003e\n\u003cimg width=\"150\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/collection-link-Perovskite-Materials.png?width=150\" loading=\"lazy\" height=\"109\" alt=\"Perovskite Materials\"\u003e\n\u003cp\u003e\u003cstrong\u003ePerovskite Materials\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"collection-tile\"\u003e\u003ca href=\"https:\/\/www.ossila.com\/collections\/semiconducting-molecules\"\u003e\n\u003cdiv class=\"collection-button background-light-blue\"\u003e\n\u003cimg width=\"150\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/collection-link-Semiconducting-Molecules.png?width=150\" loading=\"lazy\" height=\"109\" alt=\"Semiconducting Molecules\"\u003e\n\u003cp\u003e\u003cstrong\u003eSemiconducting\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eMolecules\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003ci\u003eLicensed by Helmholtz-Zentrum Berlin für Materialien und Energie GmbH in Germany and Kaunas University of Technology in Lithuania.\u003c\/i\u003e\u003c\/p\u003e","brand":"Ossila","offers":[{"title":"250 mg","offer_id":51523880091864,"sku":"M2594A1-250mg","price":345.0,"currency_code":"USD","in_stock":true},{"title":"500 mg","offer_id":51523880124632,"sku":"M2594A1-500mg","price":555.0,"currency_code":"USD","in_stock":true},{"title":"1 g","offer_id":51523880157400,"sku":"M2594A1-1g","price":885.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0287\/files\/BrAs-3053380-37-0-chemical-structure-title.png?v=1774965837","url":"https:\/\/www.ossila.com\/products\/bras","provider":"Ossila","version":"1.0","type":"link"}