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Optimization of ZnO Nanorod Array Morphology for Hybrid Photovoltaic Devices
- Source :
- The Journal of Physical Chemistry C. 113:15778-15782
- Publication Year :
- 2009
- Publisher :
- American Chemical Society (ACS), 2009.
-
Abstract
- Hybrid inorganic oxide/conjugated polymer photovoltaic devices using ZnO nanorod arrays (NRAs) instead of planar films as the electron-transport layer exhibit significant improvements in performance that have been attributed to increased heterojunction surface area, although the relationship has not been quantitatively established. Here, we independently measure the surface area of ZnO NRAs and quantify its effect on the performance of ZnO NRA/poly(3-hexylthiophene) (P3HT) photovoltaic devices. We find that a device utilizing a vertically aligned 180 nm ZnO NRA exhibits an ∼2.7× enhancement in the short-circuit current compared with that of a bilayer device, in excellent agreement with the increase in surface area. In addition, we show that a subtle difference in the NRA morphology can impact P3HT crystallinity in the photoactive region. Improved P3HT crystallinity leads to an ∼25% enhancement in the short-circuit current for devices with the same surface area. On the basis of these findings, we modify th...
- Subjects :
- chemistry.chemical_classification
Materials science
Bilayer
Photovoltaic system
Heterojunction
Nanotechnology
Polymer
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Crystallinity
General Energy
Planar
chemistry
Nanorod
Physical and Theoretical Chemistry
Layer (electronics)
Subjects
Details
- ISSN :
- 19327455 and 19327447
- Volume :
- 113
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry C
- Accession number :
- edsair.doi...........ab2447f19db4a859b16ec4669d45d40e