Optical interference for the matching of the external and internal quantum efficiencies in organic photovoltaic cells
| Autor: | Pablo Romero-Gomez, Silvia Colodrero, Xavier Elias, Jordi Martorell, Rafael Betancur, Alberto Martínez-Otero, Hernán Míguez |
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| Rok vydání: | 2012 |
| Předmět: |
Range (particle radiation)
Photon Materials science Organic solar cell Organic solar cells Renewable Energy Sustainability and the Environment business.industry Optical interference Transfer-matrix method (optics) Photovoltaic system Reflectivity Surfaces Coatings and Films Electronic Optical and Magnetic Materials Photovoltaics Optics Optoelectronics business Quantum |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 0927-0248 2011-2866 |
| Popis: | 5 páginas, 5 figuras, 1 tabla We demonstrate experimentally that an appropriate combination of the layer thicknesses in an inverted P3HT:PCBM cell leads to an optical interference such that the EQE amounts to 91% of IQE. We observe that reflectivity between layers is minimized in a wavelength range of more than 100 nm. In that range the EQE closely matches the IQE. The role played by the optical interference in improving the performance of the fabricated solar cells is confirmed by EQE calculated numerically using a model based on the transfer matrix method. Additionally, we observed that a similar cell with an active material 1.7 times thicker exhibited a lower PCE. The poor photon harvesting in the later cell configuration is attributed to an EQE that amounts only to 72% of the IQE. JM acknowledges the Ministerio de Ciencia e Innovación which supported the work under Grants MAT2011-28665 and CONSOLIDER NANOLIGHTCSD2007-00046. HM acknowledges the Ministerio de Ciencia e Innovación for funding provided under Grants MAT2011-23593 and CONSOLIDER HOPECSD2007-00007. HM also acknowledges the Junta de Andalucía for Grants FQM3579 and FQM5247. |
| Databáze: | OpenAIRE |
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