Long channel p-type field effect transistors were realized by using 5,10,15,20-tetra-phenyl porphyrin. The organic was deposited by spray coating from a chloroform solution onto thermally oxidized silicon substrates where chromium source and drain contacts were realized. Coplanar and structures with a high geometric ratio were defined by fine line lithography in order to increase the collected current. Gate bias up to -100 V and drain to source bias up to -30 V were used. Leakage paths through the dielectric, also at low voltage, were evidenced by monitoring the gate current. Source to drain currents were evaluated considering the Kirchhoff law keeping into account the leakage currents. On these basis, a complete characterization of the transistors was carried out. Threshold voltage equal to -7.5 V was estimated on a 40 Pro long device. Hole field effect mobility equal to 0.007 cm(2)/Vs was evaluated from zero-bias channel conductance. Besides, field dependent mobility as high as 0.012 cm(2)/Vs and transconductance equal to 6.5 muA/V were estimated from the analysis of the achieved results. The operation mechanism of the transistor and current modulation at low and high field is presented and discussed. (C) 2003 Elsevier Science B.V. All rights reserved.
Checcoli, P., Conte, G., Salvatori, S., Paolesse, R., Bolognesi, A., Berliocchi, M., et al. (2003). Tetra-phenyl porphyrin based thin film transistors. In Synthetic Metals (pp.261-266). ELSEVIER SCIENCE SA.
|Autori:||Checcoli, P.; Conte, G.; Salvatori, S.; Paolesse, R.; Bolognesi, A.; Berliocchi, M.; Brunetti, F.; D'Amico, A.; Di Carlo, A.; Lugli, P.|
|Titolo:||Tetra-phenyl porphyrin based thin film transistors|
|Nome del convegno:||Spring Meeting of the European-Materials-Research-Society (E-MRS)|
|Luogo del convegno:||STRASBOURG, FRANCE|
|Anno del convegno:||JUN 18-21, 2002|
|Enti collegati al convegno:||European Mat Res Soc|
|Data di pubblicazione:||2003|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/S0379-6779(02)01308-5|
|Settore Scientifico Disciplinare:||Settore CHIM/07 - Fondamenti Chimici delle Tecnologie|
Settore ING-INF/01 - Elettronica
|Tipologia:||Intervento a convegno|
|Citazione:||Checcoli, P., Conte, G., Salvatori, S., Paolesse, R., Bolognesi, A., Berliocchi, M., et al. (2003). Tetra-phenyl porphyrin based thin film transistors. In Synthetic Metals (pp.261-266). ELSEVIER SCIENCE SA.|
|Appare nelle tipologie:||02 - Intervento a convegno|