904899

Spiro[9H-fluorene-9,9′-[9H]xanthene]-2,7-diamine

• Synonym(s): N,N,N′,N′-tetrakis(4-methoxyphenyl)spiro[fluorene-9,9′-xanthene]-2,7-diamine, X59
• Empirical Formula (Hill Notation): C₅₃H₄₂N₂O₅
• CAS Number: 2095034-97-0
• Molecular Weight: 786.91
• UNSPSC Code: 12352116
• NACRES: NA.23

Properties

• description: Band gap: Eg = 3.05 eV (lit); Hole Mobility: 5.5 x 10^-5 cm²/Vs (lit)
• Assay: ≥98%
• form: powder
• color: yellow
• conductivity: 1.9 x 10-4 S/cm (lit)
• Orbital energy: HOMO -5.15 eV ; LUMO -2.10 eV

Description

General description

Spiro[9H-fluorene-9,9′-[9H]xanthene]-2,7-diamine (X59) is a hole transporting material (HTM), which has a spiro[fluorene-9,9′-xanthene] as a core component. It can be synthesized by Buchwald-Hartwig reaction. It shows a power conversion efficiency (PCE) of 19.8%.

Application

X59 can be used in the formation of hole transporting layer (HTL) for the fabrication of polymeric solar cells (PSCs) and perovskite solar cells.

X59 is a new hole transporting material (HTM) with spiro[fluorene-9,9′-xanthene] as the core moiety. An impressive power conversion efficiency (PCE) of 19.8% was achieved by using X59 as HTM in perovskite solar cell, which can compete with the record PCE by using the state-of-the-art-HTM Spiro-OMeTAD. The X59-based devices show negligible hysteresis and reasonable stability in dark and dry conditions at room temperature for over five weeks.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable