Laterally grown show better performance: ZnO nanorods network based field effect transistors
- 175 Downloads
In this work, ZnO based field effect transistors have been demonstrated using self-aligned nanorods (NRs) network synthesized through a facile hydrothermal route. To control the alignment and orientation of nanorods two additives viz. Potassium Permanganate (KMnO4) and Potassium Dichromate (K2Cr2O7) were added into the precursor solution. The effect of additive was studied through structural and optical characterization of nanorods. Further, these nanorods were used as an active layer in field effect transistors (FETs) and the estimated field effect mobility and current on/off ratio of the devices were 0.56 × 10−4 cm2/V s and 10 for vertically aligned and 9.04 cm2/V s and 6 × 103 for laterally aligned NRs network respectively. It was observed that the transport properties of charges are associated with the alignment, size, interface junctions of NRs/NRs or NRs/electrode and trap defects/states on the surface. The possible mechanism of charge transport in network path has been systematically discussed.
KeywordsSeed Layer Field Effect Transistor Drain Current HMTA Field Effect Mobility
Authors acknowledge Sophisticated Instrument Centre, IIT Indore for FESEM, XRD, and PL facilities. Further, A. K. would like to thank the Ministry of Human Resource Development (MHRD), India for providing the Teaching Assistantship (TA).
- 1.Y.K. Mishra, G. Modi, V. Cretu, V. Postica, O. Lupan, T. Reimer, I. Paulowicz, V. Hrkac, W. Benecke, L. Kienle, R. Adelung, Direct growth of freestanding ZnO tetrapod networks for multifunctional applications in photocatalysis, UV photodetection, and gas sensing. ACS Appl. Mater. Interfaces 7, 14303 (2015)CrossRefGoogle Scholar
- 4.T. Dixit, A. Kumar, I.A. Palani, V. Singh. Surface-plasmon-mediated red and near infrared emission from Au-coated ZnO/ZnCr2O4 nanocomposites. ScriptaMaterialia 114, 84 (2016)Google Scholar
- 12.A. Kumar, T. Dixit, I.A. Palani, P.R Sagdeo, V. Singh, Hydrothermally processed photosensitive field effect transistor based on ZnO nanorod networks. J. Electron. Mater. 45(11), (2016). doi: 10.1007/s11664-016-4768-y
- 30.T. Dixit, A. Bilgaiyan, I.A. Palani, D. Nakamura, T. Okada, V. Singh, Influence of potassium permanganate on the anisotropic growth and enhanced UV emission of ZnO nanostructures using hydrothermal process for optoelectronic applications. J. Sol–Gel. Sci. Technol. 75, 693 (2015)CrossRefGoogle Scholar
- 31.T. Dixit, I.A. Palani, V. Singh, Investigation on the influence of dichromate ion on the ZnO nano-dumbbells and ZnCr2O4 nano-walls. J. Mater. Sci. 26, 821 (2015)Google Scholar