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Cascade organic solar cells with energy-level-matched three photon-harvesting layers
- Source :
-
Chemical Physics Letters . Feb2013, Vol. 557, p88-91. 4p. - Publication Year :
- 2013
-
Abstract
- Abstract: The performances of organic photovoltaic cells were improved by matching the energy levels of three photon-harvesting layers with distinct light absorption spectra. Pentacene, phthalocyanine, and C70, which have shallow, intermediate, and deep energy levels, respectively, were introduced as photon harvesting layers to form a cascade structure and secure appropriate band offsets at all interfaces. This architecture yielded higher values of the open-circuit voltage and short-circuit current density than a standard bilayer structure based on pentacene and C70. A device prepared with metal-free phthalocyanine performed better than a device with Cu phthalocyanine because the energy levels were more appropriately tuned. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00092614
- Volume :
- 557
- Database :
- Academic Search Index
- Journal :
- Chemical Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 85175078
- Full Text :
- https://doi.org/10.1016/j.cplett.2012.11.087