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Ag nanoparticles/PPV composite nanofibers with high and sensitive opto-electronic response
Jinfeng Chen1, Peipei Yang, Chunjiao Wang
1Faculty of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China. huangzh295@nenu.edu.cn.
Nanoscale Research Letters
|June 30, 2011
Summary
Novel silver/poly(p-phenylene vinylene) [PPV] composite nanofibers show enhanced opto-electronic properties. These nanomaterials exhibit a photocurrent more than three times the dark current, indicating their potential for advanced electronic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Poly(p-phenylene vinylene) [PPV] is a conjugated polymer with promising optoelectronic properties.
- Silver nanoparticles [Ag NPs] can enhance the performance of organic electronic devices.
- Combining Ag NPs with PPV in a nanofiber structure offers a unique platform for novel optoelectronic materials.
Purpose of the Study:
- To synthesize and characterize novel silver nanoparticle/poly(p-phenylene vinylene) [Ag/PPV] composite nanofibers.
- To investigate the optoelectronic properties of individual Ag/PPV composite nanofibers.
- To explore the potential of these composite nanofibers as optoelectronic nanomaterials.
Main Methods:
- Electrospinning was employed to fabricate Ag/PPV composite nanofibers.
- Transmission electron microscopy [TEM] was used to determine the morphology and size of the composite fibers and Ag nanoparticles.
- Fourier transform infrared spectroscopy [FTIR] was utilized to analyze the chemical interactions between Ag nanoparticles and the PPV matrix.
- Fabrication and testing of a device using a single Ag/PPV composite nanofiber with an gold [Au] top electrode.
Main Results:
- Composite nanofibers with an average diameter of approximately 500 nm were successfully prepared.
- Silver nanoparticles, with an average diameter of about 25 nm, were uniformly dispersed within the PPV matrix.
- FTIR analysis suggested a coordination effect between Ag atoms and the PPV π-system, facilitating photoexciton dissociation and interfacial charge transfer.
- A single Ag/PPV composite nanofiber device demonstrated a photocurrent over three times greater than the dark current under illumination (5.76 mW/cm²) and a voltage of 20 V.
Conclusions:
- The synthesized Ag/PPV composite nanofibers possess excellent optoelectronic properties.
- The uniform dispersion of Ag nanoparticles and their interaction with the PPV matrix are crucial for enhanced performance.
- These composite nanofibers represent a promising class of nanomaterials for sensitive optoelectronic applications.
