Materials, Semiconducting Polymers
Fluoro-PTAA (specifically known as 1F-PTAA), or poly(bis(4-phenyl)(4-fluoro-2-methylphenyl)amine, is a mono-fluorinated poly(triaryl)amine which is used as a hole transporting layer (HTL) for perovskite and polymer solar cells.
With the substitution of the methyl to fluorine on the 4-postion, the HOMO energy level is significantly lowered from 5.14 eV to 5.52 eV, which is essential to increase the open voltage (VOC) thus to improve the device efficiency. Fluorination of PTAA also drastically improves device operating lifetime, moisture and thermal stress stability. Fluoro-PTAA is therefore considered a great alternative as a hole transporting layer material for PTAA and Spiro-OMeTAD.
Perovskite solar cells (PSCs) with hexyltrimethylammounium bromide (HTAB) cast perovskite quantum wells (PQWs) and 1F-PTAA as HTL demonstrated efficiencies exceeding 22% along with significantly improved device stability [2]
| Device structure |
FTO/SnO2/Cs0.05FA0.81MA0.14PbI2.55Br0.45/1F-PTAA/Au [2] |
| JSC (mA cm-2) | 23.11 |
| VOC (V) | 1.15 |
| FF (%) | 75.61 |
| PCE | 20.09 |
| Device structure |
FTO/SnO2/Cs0.05FA0.81MA0.14PbI2.55Br0.451F-PTAA/Au [2] |
| JSC (mA cm-2) | 23.72 |
| VOC (V) | 1.21 |
| FF (%) | 77.21 |
| PCE | 22.16 |
| CAS number | N.A. |
| Chemical formula | (C19H14NF)n |
| Full name | Poly(bis(4-phenyl)(4-fluoro-2-methylphenyl)amine |
| Molecular weight | Please see batch details |
| HOMO / LUMO | HOMO 5.52 eV, LUMO 2.55 eV [1] |
| Recommended solvents | Chlorobenzene, chloroform, THF and toluene |
| Synonyms | F-PTAA, FMe-PTAA, 1F-PTAA |
| Classification / Family |
Polyamines, Hole-transport layer materials, Electron-blocking layer materials, Organic semiconducting materials, Organic photovoltaics, Polymer solar cells, Perovskite solar cells, OLED materials |
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