Interdigitated Back-Contacted Silicon Heterojunction Solar Cells With Improved Fill Factor and Efficiency
| Autor: | R. Ferre, T. F. Schulze, Nicola Mingirulli, Ralf Gogolin, Lars Korte, Nils-Peter Harder, Jan Düsterhöft, Jan Haschke |
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| Rok vydání: | 2011 |
| Předmět: |
Amorphous silicon
Materials science Equivalent series resistance Silicon business.industry Photovoltaic system chemistry.chemical_element Heterojunction Condensed Matter Physics Electronic Optical and Magnetic Materials Amorphous solid law.invention chemistry.chemical_compound chemistry law Solar cell Optoelectronics Crystalline silicon Electrical and Electronic Engineering business |
| Zdroj: | IEEE Journal of Photovoltaics. 1:130-134 |
| ISSN: | 2156-3403 2156-3381 |
| Popis: | We compare recently reported results of efficient back-contacted amorphous/crystalline silicon heterojunction solar cells with fill factors up to 78.8% with calculated j-V characteristics that are derived from an area-weighted summation of recombination currents taken from lifetime measurements. We compare solar cell structures with and without an intrinsic buffer layer beneath the p-type amorphous silicon emitter. We find that the inclusion of the buffer layer reduces the fill-factor potential by changing the ideality of the recombination current. However, analyzing the series resistance by illumination-dependent j-V-measurements, we find that the major loss mechanism of the fill factor is the limitation of the charge-carrier transport. |
| Databáze: | OpenAIRE |
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