A new method is reported to make air-stable n-type organic mixed ionic-electronic conductor (OMIEC) films for organic electrochemical transistors (OECTs) using a solution-processable small molecule helical perylene diimide trimer, hPDI[3]-C11. Alkyl side chains are attached to the conjugated core for processability and film making, which are then cleaved via thermal annealing. After the sidechains are removed, the hPDI[3] film becomes less hydrophobic, more ordered, and has a deeper lowest unoccupied molecular orbital (LUMO). These features provide improved ionic transport, greater electronic mobility, and increased stability in air and in aqueous solution. Subsequently, hPDI[3]-H is used as the active material in OECTs and a device with a transconductance of 44 mS, volumetric capacitance of ≈250 F cm−3, µC* value of 1 F cm−1 V−1 s−1, and excellent stability (> 5 weeks) is demonstrated. As proof of their practical applications, a hPDI[3]-H-based OECTs as a glucose sensor and electrochemical inverter is utilized. The approach of side chain removal after film formation charts a path to a wide range of molecular semiconductors to be used as stable, mixed ionic-electronic conductors.

Nguyen-Dang, T., Bao, S., Kaiyasuan, C., Li, K., Chae, S., Yi, A., et al. (2024). Air-Stable Perylene Diimide Trimer Material for N-Type Organic Electrochemical Transistors. ADVANCED MATERIALS [10.1002/adma.202312254].

Air-Stable Perylene Diimide Trimer Material for N-Type Organic Electrochemical Transistors

Pallini F.;Beverina L.;
2024

Abstract

A new method is reported to make air-stable n-type organic mixed ionic-electronic conductor (OMIEC) films for organic electrochemical transistors (OECTs) using a solution-processable small molecule helical perylene diimide trimer, hPDI[3]-C11. Alkyl side chains are attached to the conjugated core for processability and film making, which are then cleaved via thermal annealing. After the sidechains are removed, the hPDI[3] film becomes less hydrophobic, more ordered, and has a deeper lowest unoccupied molecular orbital (LUMO). These features provide improved ionic transport, greater electronic mobility, and increased stability in air and in aqueous solution. Subsequently, hPDI[3]-H is used as the active material in OECTs and a device with a transconductance of 44 mS, volumetric capacitance of ≈250 F cm−3, µC* value of 1 F cm−1 V−1 s−1, and excellent stability (> 5 weeks) is demonstrated. As proof of their practical applications, a hPDI[3]-H-based OECTs as a glucose sensor and electrochemical inverter is utilized. The approach of side chain removal after film formation charts a path to a wide range of molecular semiconductors to be used as stable, mixed ionic-electronic conductors.
Articolo in rivista - Articolo scientifico
mixed ionic-electronic conductors; n-type semiconductors; organic electrochemical transistors; sidechain engineering; small molecules;
English
24-mar-2024
2024
2312254
none
Nguyen-Dang, T., Bao, S., Kaiyasuan, C., Li, K., Chae, S., Yi, A., et al. (2024). Air-Stable Perylene Diimide Trimer Material for N-Type Organic Electrochemical Transistors. ADVANCED MATERIALS [10.1002/adma.202312254].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/477400
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