Strategies for Doped Nanocrystalline Silicon Integration in Silicon Heterojunction Solar Cells
Autor: | Johannes P. Seif, N. Holm, Christophe Ballif, Silvia Martin de Nicolas, Antoine Descoeudres, Aïcha Hessler-Wyser, Martin Ledinsky, Simon Hänni, Stefaan De Wolf, Jonas Geissbühler, Martial Duchamp, Rafal E. Dunin-Borkowski, Gizem Nogay |
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Rok vydání: | 2016 |
Předmět: |
Amorphous silicon
Materials science 02 engineering and technology Quantum dot solar cell 01 natural sciences Polymer solar cell law.invention Monocrystalline silicon chemistry.chemical_compound law Microcrystalline silicon 0103 physical sciences Solar cell Crystalline silicon Electrical and Electronic Engineering 010302 applied physics nanocrystalline silicon business.industry Nanocrystalline silicon 021001 nanoscience & nanotechnology Condensed Matter Physics Copper indium gallium selenide solar cells Electronic Optical and Magnetic Materials chemistry solar cells Optoelectronics silicon heterojunctions (SHJs) 0210 nano-technology business |
Zdroj: | IEEE Journal of Photovoltaics. 6:1132-1140 |
ISSN: | 2156-3403 2156-3381 |
Popis: | Carrier collection in silicon heterojunction (SHJ) solar cells is usually achieved by doped amorphous silicon layers of a few nanometers, deposited at opposite sides of the crystalline silicon wafer. These layers are often defect-rich, resulting in modest doping efficiencies, parasitic optical absorption when applied at the front of solar cells, and high contact resistivities with the adjacent transparent electrodes. Their substitution by equally thin doped nanocrystalline silicon layers has often been argued to resolve these drawbacks. However, low-temperature deposition of highly crystalline doped layers of such thickness on amorphous surfaces demands sophisticated deposition engineering. In this paper, we review and discuss different strategies to facilitate the nucleation of nanocrystalline silicon layers and assess their compatibility with SHJ solar cell fabrication. We also implement the obtained layers into devices, yielding solar cells with fill factor values of over 79% and efficiencies of over 21.1%, clearly underlining the promise this material holds for SHJ solar cell applications. |
Databáze: | OpenAIRE |
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