2,2’,7,7’-Tetrakis-(N,N-di-4-methoxyphenylamino)-9,9’-spirobifluorene

• CAT Number: R013017
• CAS Number: 207739-72-8
• Molecular Formula: C81H68N4O8
• Molecular Weight: 1225.43
• Purity: 99%
• Synonyms: 2,2′,7,7′-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene
• Appearance: White to pale yellow powder
• Storage: Room Temperature (Recommended in a cool and dark place)
• IUPAC Name: 2-N,2-N,2-N',2-N',7-N,7-N,7-N',7-N'-octakis(4-methoxyphenyl)-9,9'-spirobi[fluorene]-2,2',7,7'-tetramine

Spiro-OMeTAD is a benchmark hole transport layer (HTL) material widely used in organic–inorganic electronic devices. Its spiro-linked structure imparts a high glass transition temperature (Tg), excellent morphological stability, and ease of processing while preserving favorable charge-transport properties. Renowned for its versatility, Spiro-OMeTAD has become the most studied HTL in perovskite solar cells (PSCs), where it delivers outstanding power conversion efficiency and stability. Beyond PSCs, it is also employed in solid-state dye-sensitized solar cells (ssDSSCs), organic light-emitting diodes (OLEDs), and polymer-based organic solar cells (OSCs), making it a cornerstone material in advanced optoelectronic applications.