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Product Code M171-200mg
Price £260 ex. VAT

PTAA, HTL material used to improve charge extraction in OLED/OFET devices

High quality polymer available with free shipping on qualifying orders

Methyl or fluoro substituted poly(triarylamines) (PTAAs) are electron rich with diphenylamine as the the backbone and substituted phenyl as side chains. Substituted PTAAs are originally used as hole transport layer (HTL) materials in OLED/OFET devices to improve charge extractions. PTAA can also act as electron blocking layer to reduce the chances of electron–hole recombination and energy loss in electronic devices. Fluorinated PTAA, 1F-PTAA and 2F-PTAA, can effectively downshift the HOMO levels of PTAA derivatives due to the electron deficiency of fluorine, resulting in an increase of VOC hence the power conversion efficiency (PCE) of the device.

PTAA from Ossila used in high impact paper

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.

Enhance power conversion efficiency PTAA


Enhance power conversion efficiency

Reduced electron-hole recombination

Reduced energy loss

Reduces electron–hole recombination

High Quality PTAA for OFET Applications

High Quality

High quality & Electron Rich

Hole-transport layer OFET Applications

Hole-transport layer

improved device performance

A range of substituted poly(triarylamine)'s (PTAA's) for use with small molecules for solution-processed high-mobility films. While PTAA has a relatively modest mobility on its own, it has been gaining interest when used in conjunction with small molecules to provide the combination of good coating parameters and high mobility [1,2].

Note: We also have a PTAA family member (PTAA for perovskites) for perovskite solar cell applications.



Batch number





4-Fluoro PTAA


6,000 g/mol

4,020 g/mol


4-Fluoro PTAA MSDS

4-Fluoro PTAA chemical structure


Batch number





Dimethyl PTAA


6,312 g/mol

4,390 g/mol


Dimethyl PTAA MSDS

Dimethyl PTAA chemical structure


Batch number





2,4 Difluoro PTAA


4,712 g/mol

3,504 g/mol


2,4 Difluoro PTAA MSDS

2-4 Difluoro PTAA chemical structure

2,4 Difluoro PTAA Distibution Plot

2-4 Difluoro PTAA distibution plot

Literature and References

Please note that Ossila has no formal connection to any of the authors or institutions in these references.

  1. Solvent and polymer matrix effects on TIPS-pentacene/polymer blend organic field-effect transistors Do Kyung Hwang et al., Journal of Materials Chemistry, V22, P5531-5537 (2012).
  2. Solution-Processed Small Molecule-Polymer Blend Organic Thin-Film Transistors with Hole Mobility Greater than 5 cm 2 /Vs J. Smith et al., Advanced Materials, V24, P2441-2446 (2012).
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