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Ultraviolet (UV) photodetectors fabricated from multi-walled carbon nanotubes (MWCNTs) and polyvinyl-alcohol (PVA) coated ZnO nanoparticles

Published online by Cambridge University Press:  22 August 2012

Dali Shao ,
Liqiao Qin  and
Shayla Sawyer
Dali Shao
Affiliation:
Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, USA, shaod@rpi.edu
Liqiao Qin
Affiliation:
Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, USA, shaod@rpi.edu
Shayla Sawyer
Affiliation:
Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, USA, shaod@rpi.edu
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Abstract

Enhanced near band-edge (NBE) emission was observed from composite structures fabricated from a PVA coated ZnO (PVA-ZnO) nanoparticle thin film embedded with multi-walled carbon nanotubes (MWCNTs). The enhancement is attributed to the resonant coupling between the bandgap transition of the semiconductor and the surface plasmon (SP) of MWCNTs. Moreover, the PVA-ZnO/MWCNTs/PVA-ZnO composite structures show faster transient response, which is due to the carrier transportation process in the composite structure. Reductions are observed for both photocurrent to dark current ratio and intensity of photoresponsivity, demonstrating a tradeoff between the time transient response and the detectivity.

Keywords

photoemissioncompositepolymer
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1454: Symposium HH – Nanocomposites, Nanostructures and Heterostructures of Correlated Oxide Systems , 2012 , pp. 287 - 296
Copyright
Copyright © Materials Research Society 2012

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