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Coppedè N, Valitova I, Mahvash F, Tarabella G, Ranzieri P, Iannotta S, Santato C, Martel R, Cicoira F. Titanyl phthalocyanine ambipolar thin film transistors making use of carbon nanotube electrodes. NANOTECHNOLOGY 2014; 25:485703. [PMID: 25388936 DOI: 10.1088/0957-4484/25/48/485703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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.
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Affiliation(s)
- Nicola Coppedè
- IMEM CNR Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze 37/A, 43124, Parma, Italy
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Toccoli T, Boschetti A, Iannotta S, Scardi P, Barbarella G, Sotgiu G. Growth by supersonic molecular-beam epitaxy of oligothiophene films with controlled properties. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13642810208223137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- T. Toccoli
- a Centro di Fisica degli Stati Aggregati, Consiglio Nazionale delle Ricerche-Istituto Trentino di Culturia, Via Sommarive 18 , 38050 , Povo, Trento , Italy
| | - A. Boschetti
- a Centro di Fisica degli Stati Aggregati, Consiglio Nazionale delle Ricerche-Istituto Trentino di Culturia, Via Sommarive 18 , 38050 , Povo, Trento , Italy
| | - S. Iannotta
- a Centro di Fisica degli Stati Aggregati, Consiglio Nazionale delle Ricerche-Istituto Trentino di Culturia, Via Sommarive 18 , 38050 , Povo, Trento , Italy
| | - P. Scardi
- b Dipartimento di Ingegneria dei Materiali , Università di Trento , 38050 , Mesiano, Trento , Italy
| | - G. Barbarella
- c Consiglio Nazionale delle Ricerche, Istituto Composti Carbonio Contenenti Eteroatomi e Applicazioni , Via Gobetti 101, 1-40129 , Bologna , Italy
| | - G. Sotgiu
- c Consiglio Nazionale delle Ricerche, Istituto Composti Carbonio Contenenti Eteroatomi e Applicazioni , Via Gobetti 101, 1-40129 , Bologna , Italy
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Coppedè N, Toccoli T, Pallaoro A, Siviero F, Walzer K, Castriota M, Cazzanelli E, Iannotta S. Polymorphism and Phase Control in Titanyl Phthalocyanine Thin Films Grown by Supersonic Molecular Beam Deposition. J Phys Chem A 2007; 111:12550-8. [DOI: 10.1021/jp075939m] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicola Coppedè
- CNR/FBK Trento Division, Institute of Photonics and Nanotechnology, Via alla Cascata 56/C, Povo 38100 (TN), Italy, Institut fuer Angewandte Photophysik, George-Bähr-Strasse 1, 01069 Dresden, Germany, and LICRYL-INFM Laboratory-CEMIF.CAL, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33B, 87036 Arcavacata da Rende (CS), Italy
| | - Tullio Toccoli
- CNR/FBK Trento Division, Institute of Photonics and Nanotechnology, Via alla Cascata 56/C, Povo 38100 (TN), Italy, Institut fuer Angewandte Photophysik, George-Bähr-Strasse 1, 01069 Dresden, Germany, and LICRYL-INFM Laboratory-CEMIF.CAL, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33B, 87036 Arcavacata da Rende (CS), Italy
| | - Alessia Pallaoro
- CNR/FBK Trento Division, Institute of Photonics and Nanotechnology, Via alla Cascata 56/C, Povo 38100 (TN), Italy, Institut fuer Angewandte Photophysik, George-Bähr-Strasse 1, 01069 Dresden, Germany, and LICRYL-INFM Laboratory-CEMIF.CAL, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33B, 87036 Arcavacata da Rende (CS), Italy
| | - Fabrizio Siviero
- CNR/FBK Trento Division, Institute of Photonics and Nanotechnology, Via alla Cascata 56/C, Povo 38100 (TN), Italy, Institut fuer Angewandte Photophysik, George-Bähr-Strasse 1, 01069 Dresden, Germany, and LICRYL-INFM Laboratory-CEMIF.CAL, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33B, 87036 Arcavacata da Rende (CS), Italy
| | - Karsten Walzer
- CNR/FBK Trento Division, Institute of Photonics and Nanotechnology, Via alla Cascata 56/C, Povo 38100 (TN), Italy, Institut fuer Angewandte Photophysik, George-Bähr-Strasse 1, 01069 Dresden, Germany, and LICRYL-INFM Laboratory-CEMIF.CAL, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33B, 87036 Arcavacata da Rende (CS), Italy
| | - Marco Castriota
- CNR/FBK Trento Division, Institute of Photonics and Nanotechnology, Via alla Cascata 56/C, Povo 38100 (TN), Italy, Institut fuer Angewandte Photophysik, George-Bähr-Strasse 1, 01069 Dresden, Germany, and LICRYL-INFM Laboratory-CEMIF.CAL, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33B, 87036 Arcavacata da Rende (CS), Italy
| | - Enzo Cazzanelli
- CNR/FBK Trento Division, Institute of Photonics and Nanotechnology, Via alla Cascata 56/C, Povo 38100 (TN), Italy, Institut fuer Angewandte Photophysik, George-Bähr-Strasse 1, 01069 Dresden, Germany, and LICRYL-INFM Laboratory-CEMIF.CAL, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33B, 87036 Arcavacata da Rende (CS), Italy
| | - Salvatore Iannotta
- CNR/FBK Trento Division, Institute of Photonics and Nanotechnology, Via alla Cascata 56/C, Povo 38100 (TN), Italy, Institut fuer Angewandte Photophysik, George-Bähr-Strasse 1, 01069 Dresden, Germany, and LICRYL-INFM Laboratory-CEMIF.CAL, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33B, 87036 Arcavacata da Rende (CS), Italy
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