Giant enhancement of bandgap emission of ZnO nanorods by platinum nanoparticles
- 11 August 2006
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 17 (17), 4391-4394
- https://doi.org/10.1088/0957-4484/17/17/017
Abstract
By the formation of ZnO and Pt nanocomposites, it is found that the bandgap emission can be greatly enhanced, while the defect emission is suppressed to the noise level. The photoluminescence intensity ratio between the bandgap and defect emission can be improved by up to 10 3 times. The underlying mechanism behind enhancement of the bandgap emission and quenching of the defect emission is a combination of the energy transfer between defects and surface plasmon resonance in Pt nanoparticles, as well as electron-hole pair generation and recombination in the ZnO nanorods. Our results will be very useful to manufacturers of highly efficient optoelectronic devices. (Some figures in this article are in colour only in the electronic version)Keywords
This publication has 22 references indexed in Scilit:
- Surface-plasmon-mediated emission from metal-capped ZnO thin filmsApplied Physics Letters, 2005
- Enhanced luminescent and electrical properties of hydrogen-plasma ZnO nanorods grown on wafer-scale flexible substratesApplied Physics Letters, 2005
- Origin of defect emission identified by polarized luminescence from aligned ZnO nanorodsJournal of Applied Physics, 2004
- Turning the tables on surface plasmonsNature Materials, 2004
- Passivation of active recombination centers in ZnO by hydrogen dopingJournal of Applied Physics, 2003
- Emission through one of two metal electrodes of an organic light-emitting diode via surface-plasmon cross couplingApplied Physics Letters, 2002
- Extraordinary transmission of organic photoluminescence through an otherwise opaque metal layer via surface plasmon cross couplingApplied Physics Letters, 2002
- Effect of hydrogen doping on ultraviolet emission spectra of various types of ZnOApplied Physics Letters, 2002
- Functional Nanoscale Electronic Devices Assembled Using Silicon Nanowire Building BlocksScience, 2001
- Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devicesNature, 2001