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. 1F-PTAA is therefore considered a great alternative as a hole transporting layer material for PTAA and Spiro-OMeTAD.
PTAA from Ossila was used in the high-impact paper (IF 30.85), Multiply Charged Conjugated Polyelectrolytes as a Multifunctional Interlayer for Efficient and Scalable Perovskite Solar Cells, E. Jung et al., Adv. Mater., 2002333 (2020); DOI: 10.1002/adma.202002333.
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 
FTO/SnO2/Cs 0.05FA0.81MA 0.14PbI2.55Br0.45 /1F-PTAA/Au 
FTO/SnO2 /Cs0.05FA0.81MA 0.14PbI2.55Br0.451F-PTAA /Au 
|JSC (mA cm-2)||23.11||23.72|
|Molecular weight||Please see batch details|
|HOMO / LUMO||HOMO 5.52 eV, LUMO 2.55 eV |
|Recommended solvents||Chlorobenzene, chloroform, THF and toluene|
|Classification / Family||
Polyamines, Hole-transport layer materials, Electron-blocking layer materials, Organic semiconducting materials, Organic photovoltaics, Polymer solar cells, Perovskite solar cells, OLED materials
Literature and Reviews
- Sequentially Fluorinated PTAA Polymers for Enhancing VOC of High-Performance Perovskite Solar Cells, Y. Kim et al., Adv. Energy Mater., 8 (29), 1801668 (2018); DOI: 10.1002/aenm.201801668.
- Perovskite Quantum Wells Formation Mechanism for Stable Efficient Perovskite Photovoltaics—A Real-Time Phase-Transition Study, H. Hu et al., Adv. Mater., 33 (17), 2006238 (2020); DOI: 10.1002/adma.202006238.
- New Strategies for Defect Passivation in High-Efficiency Perovskite Solar Cells, S. Akin et al., Adv. Energy Mater., 10 (13), 1903090 (2020); DOI: 10.1002/aenm.201903090..
To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.