Polymer Light‐Emitting Transistors With Charge‐Carrier Mobilities Exceeding 1 cm2 V−1 s−1

Chaudhry, M.U.; Panidi, J.; Nam, S.; Smith, A.; Lim, J.; Tezner, K.; Patsalos, P.A.; Vourlias, G.; Sit, W.; Firdaus, Y.; Heeney, M.; Bradley, D.; Anthopoulos, T.D.

Abstract

The vast majority of conjugated polymer-based light emitting field-effect transistors (LEFETs) are characterized by low charge carrier mobilities typically in the range 10-5 to 10-3 cm2 V-1 s-1 range. Fast carrier transport is a highly desirable characteristic for high frequency LEFET operation and, potentially, for use in electrically-pumped lasers. Unfortunately, high mobility organic semiconductors are often characterised by strong intermolecular π-π interactions that reduce luminescence. Development of new materials and/or device concepts that overcome this hurdle are therefore required. We report single organic semiconductor layer, light-emitting transistors that combine the highest hole mobilities reported to date for any polymer-based LEFET, with encouraging light emission characteristics. We achieve this in a single polymer layer LEFET, which was further enhanced through the use of a small-molecule/conjugated polymer blend system that possesses a film microstructure which supports enhanced charge carrier mobility (3.2 cm2 V-1 s-1) and promising light emission characteristics (1600 cd m-2) as compared to polymer-only based LEFETs. This simple approach represents an attractive strategy to further advance the performance of solution-processed LEFETs.

Citation

Chaudhry, M., Panidi, J., Nam, S., Smith, A., Lim, J., Tezner, K., …Anthopoulos, T. (2020). Polymer Light‐Emitting Transistors With Charge‐Carrier Mobilities Exceeding 1 cm2 V−1 s−1. Advanced Electronic Materials, 6(1), Article 1901132. https://doi.org/10.1002/aelm.201901132

• Journal Article Type: Article
• Acceptance Date: Oct 29, 2019
• Online Publication Date: Nov 25, 2019
• Publication Date: Jan 13, 2020
• Deposit Date: Nov 13, 2019
• Publicly Available Date: Nov 25, 2020
• Journal: Advanced Electronic Materials
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Issue: 1
• Article Number: 1901132
• DOI: https://doi.org/10.1002/aelm.201901132