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Monitoring Charge Exchange in P3HT-Nanotube Composites Using Optical and Electrical Characterisation
- Source :
- Nanoscale Research Letters, Vol 4, Iss 7, Pp 635-639 (2009), Nanoscale Research Letters, Nanoscale Res.Lett.
- Publisher :
- Springer Nature
-
Abstract
- Charge exchange at the bulk heterojunctions of composites made by mixing single wall nanotubes (SWNTs) and polymers show potential for use in optoelectronic devices such as solar cells and optical sensors. The density/total area of these heterojunctions is expected to increase with increasing SWNT concentration but the efficiency of solar cell peaks at low SWNT concentrations. Most researchers use current–voltage measurements to determine the evolution of the SWNT percolation network and optical absorption measurements to monitor the spectral response of the composites. However, these methods do not provide a detailed account of carrier transport at the concentrations of interest; i.e., near or below the percolation threshold. In this article, we show that capacitance–voltage (C–V) response of (metal)-(oxide)-(semiconducting composite) devices can be used to fill this gap in studying bulk heterojunctions. In an approach where we combine optical absorption methods withC–V measurements we can acquire a unified optoelectronic response from P3HT-SWNT composites. This methodology can become an important tool for optoelectronic device optimization.
- Subjects :
- Solar cells
Current-voltage measurements
Nanotube
Materials science
Bulk heterojunction
SWNT composites
Carbon nanotubes
Oxide
Percolation networks
Percolation thresholds
Nanochemistry
Nanotechnology
Optoelectronic devices
Absorption
law.invention
chemistry.chemical_compound
Charge transfer
Materials Science(all)
law
Solar cell
lcsh:TA401-492
Single wall nanotubes
General Materials Science
Light absorption
Composite material
Absorption (electromagnetic radiation)
Electrooptical devices
Nanotube composites
Nano Express
Electrical characterisation
Optical absorption
Photovoltaic cells
Optical absorption measurement
Heterojunction
Percolation threshold
Condensed Matter Physics
Percolation (fluids)
Charge exchanges
chemistry
Plasmas
Capacitance voltage
Optical sensors
Percolation
Solvents
Spectral response
lcsh:Materials of engineering and construction. Mechanics of materials
C-V measurement
Subjects
Details
- Language :
- English
- ISSN :
- 19317573
- Volume :
- 4
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Nanoscale Research Letters
- Accession number :
- edsair.doi.dedup.....07ce391e4985d19c769c423227fdb9aa
- Full Text :
- https://doi.org/10.1007/s11671-009-9287-9