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The effect of C60 on the ZnO-nanorod surface in organic–inorganic hybrid photovoltaics
- Source :
-
Solar Energy Materials & Solar Cells . Feb2011, Vol. 95 Issue 2, p740-744. 5p. - Publication Year :
- 2011
-
Abstract
- Abstract: The electrical property of the organic–inorganic heterojunctions is one of the important factors affecting the performance of hybrid photovoltaic devices. We introduce a good electron conductor, C60, to modify the surface of ZnO-nanorod arrays in a ZnO-nanorod/poly(3-hexylthiophene):(6,6)-phenyl C61 butyric acid methyl ester (ZnO/P3HT:PCBM) hybrid photovoltaic structure. We found that there is ∼40% and ∼15% increment in the short circuit current (J SC ) and open circuit voltage (V OC ), respectively, for the device after C60 modification. By probing the carrier dynamics and the surface property of ZnO-nanorods, the presence of the C60 layer assists the exciton separation and passivates part of the defect states on the ZnO-nanorod surface. The charge transport property at the ZnO/polymer blend interface is, therefore, improved. As a result, higher charge concentration can transfer from the polymer blend to the ZnO-nanorods more effectively and subsequently travel to electrodes leading to the improved performance in the photovoltaic device. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09270248
- Volume :
- 95
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Solar Energy Materials & Solar Cells
- Publication Type :
- Academic Journal
- Accession number :
- 57077165
- Full Text :
- https://doi.org/10.1016/j.solmat.2010.10.015