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Titanyl Phthalocyanine Ambipolar Thin Film Transistors Making Use of Carbon Nanotube Electrodes

Titanyl Phthalocyanine Ambipolar Thin Film Transistors Making Use of Carbon Nanotube Electrodes

Nicola Coppedè, Irina Valitova, Farzaneh Mahvash, Giuseppe Tarabella, Paolo Ranzieri, Salvatore Iannotta, Clara Santato, Richard Martel, Fabio Cicoira

Nanotechnology. 2014 Dec 5;25(48):485703.

PMID: 25388936

Abstract:

The capability of efficiently injecting charge carriers into organic films and finely tuning their morphology and structure is crucial to improve the performance of organic thin film transistors (OTFTs). In this work, we investigate OTFTs employing carbon nanotubes (CNTs) as the source-drain electrodes and, as the organic semiconductor, thin films of titanyl phthalocyanine (TiOPc) grown by supersonic molecular beam deposition (SuMBD). While CNT electrodes have shown an unprecedented ability to improve charge injection in OTFTs, SuMBD is an effective technique to tune film morphology and structure. Varying the substrate temperature during deposition, we were able to grow both amorphous (low substrate temperature) and polycrystalline (high substrate temperature) films of TiOPc. Regardless of the film morphology and structure, CNT electrodes led to superior charge injection and transport performance with respect to benchmark Au electrodes. Vacuum annealing of polycrystalline TiOPc films with CNT electrodes yielded ambipolar OTFTs.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP26201321	Titanyl phthalocyanine		26201-32-1	Price

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