Cánovas Díaz, Enrique and Martí Vega, Antonio and Fuertes Marrón, David and Antolín Fernández, Elisa and García-Linares Fontes, Pablo and Luque López, Antonio and Farmer, C.D. and Stanley, Colin (2009) Optical Characterization of Quantum Dot Intermediate Band Solar Cells. In: 23rd European Photovoltaic Solar Energy Conference, 01/09/2008-05/09/2008, Valencia, España.
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| Item Type: | Presentation at Congress or Day (Article) | ||||||||||||||||||
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| Title: | Optical Characterization of Quantum Dot Intermediate Band Solar Cells | ||||||||||||||||||
| Event Title: | 23rd European Photovoltaic Solar Energy Conference | ||||||||||||||||||
| Event Dates: | 01/09/2008-05/09/2008 | ||||||||||||||||||
| Event Location: | Valencia, España | ||||||||||||||||||
| Title of Book: | Proceedings of the 23rd European Photovoltaic Solar Energy Conference | ||||||||||||||||||
| Publisher: | WIP-Renewable Energie | ||||||||||||||||||
| Date: | 2009 | ||||||||||||||||||
| ISBN: | 3-936338-24-8 | ||||||||||||||||||
| Department: | Physical Electronics | ||||||||||||||||||
| Faculty: | E.T.S.I. Telecommunication (UPM) | ||||||||||||||||||
| Creative Commons licenses: | Recognition - No derivative works - No commercial | ||||||||||||||||||
| Item ID: | 3579 | ||||||||||||||||||
| Subjects: | Renewable Energy Physics |
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Abstract
In this paper we present an optical characterization for quantum dot intermediate band solar cells (QDIBSCs). The cells were developed by growing a stack of ten InAs/GaAs QDs layers between p and n doped GaAs conventional emitters. Electroluminescence, EL, photoreflectance, PR, and transmission electron microscopy, TEM, were applied to the samples in order to test and characterize them optically. The results, derived from the application of the different techniques, showed a good correlation. TEM images revealed a very good structural quality of the QDs, which seem to evolve in shape-strain from the bottom to the top of the stack. Corresponding to the quality observed by TEM, strong signals from EL and PR resolved unambiguously the energy band diagram of the QDIBSCs. By fitting PR data we were able to indentify the coexistence of bands and discrete energy levels coming from the IB material. The PR data evidenced also a strong electric field over the dots, attributed to the space charge region created between the p-n emitters sandwiching the IB material. From EL results, we identified the predominantly radiative nature of the IB material related energy transitions
| Item Type: | Presentation at Congress or Day (Article) |
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| Uncontrolled Keywords: | Intermediate Band, Quantum Dots, Spectroscopy |
| Subjects: | Renewable Energy Physics |
| Código ID: | 3579 |
| Depositado Por: | Memoria Investigacion |
| Depositado el: | 01 Apr 2011 12:03 |
| Last Modified: | 01 Apr 2011 12:03 |
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