Utilization of surface plasmon resonance of Au/Pt nanoparticles for highly photosensitive ZnO nanorods network based plasmon field effect transistor

作者：Kumar Ashish; Dixit Tejendra; Palani I A; Nakamura D; Higashihata M; Singh Vipul^*

来源：Physica E: Low-Dimensional Systems and Nanostructures , 2017, 93: 97-104.

DOI：10.1016/j.physe.2017.06.005

• ZnO nanorod networks
• Surface plasmons
• Field effect transistor
• Photosensitivity

Hydrothermally processed highly photosensitive ZnO nanorods based plasmon field effect transistors (PFETs) have been demonstrated utilizing the surface plasmon resonance coupling of Au and Pt nanoparticles at Au/Pt and ZnO interface. A significantly enhanced photocurrent was observed due to the plasmonic effect of the metal nanoparticles (NPs). The Pt coated PFETs showed I-on/I-off ratio more than 3 x 10(4) under the dark condition, with field-effect mobility of 26 cm(2) V-1 s(-1) and threshold voltage of -2.7 V. Moreover, under the illumination of UV light (lambda = 350 nm) the PFET revealed photocurrent gain of 10(5) under off-state (-5 V) of operation. Additionally, the electrical performance of PFETs was investigated in detail on the basis of charge transfer at metal/ZnO interface. The ZnO nanorods growth temperature was preserved at 110 degrees C which allowed a low temperature, economical and simple method to develop highly photosensitive ZnO nanorods network based PFETs for large scale production.