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Autodiffusion : a novel method for emitter formation in crystalline silicon thin-film solar cells

Autodiffusion : a novel method for emitter formation in crystalline silicon thin-film solar cells

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WOLF, Andreas, Barbara TERHEIDEN, Rolf BRENDEL, 2007. Autodiffusion : a novel method for emitter formation in crystalline silicon thin-film solar cells. In: Progress in Photovoltaics : Research and Applications. 15(3), pp. 199-210. ISSN 1062-7995. eISSN 1099-159X. Available under: doi: 10.1002/pip.727

@article{Wolf2007Autod-31591, title={Autodiffusion : a novel method for emitter formation in crystalline silicon thin-film solar cells}, year={2007}, doi={10.1002/pip.727}, number={3}, volume={15}, issn={1062-7995}, journal={Progress in Photovoltaics : Research and Applications}, pages={199--210}, author={Wolf, Andreas and Terheiden, Barbara and Brendel, Rolf} }

eng Brendel, Rolf Brendel, Rolf 2015-08-17T13:20:15Z Wolf, Andreas Terheiden, Barbara The in situ formation of an emitter in monocrystalline silicon thin-film solar cells by solid-state diffusion of dopants from the growth substrate during epitaxy is demonstrated. This approach, that we denote autodiffusion, combines the epitaxy and the diffusion into one single process. Layer-transfer with porous silicon (PSI process) is used to fabricate n-type silicon thin-film solar cells. The cells feature a boron emitter on the cell rear side that is formed by autodiffusion. The sheet resistance of this autodiffused emitter is 330 Ω/□. An independently confirmed conversion efficiency of (14·5 ± 0·4)% with a high short circuit current density of (33·3 ± 0·8) mA/cm2 is achieved for a 2 × 2 cm2 large cell with a thickness of (24 ± 1) µm. Transferred n-type silicon thin films made from the same run as the cells show effective carrier lifetimes exceeding 13 µs. From these samples a bulk diffusion length L > 111 µm is deduced. Amorphous silicon is used to passivate the rear surface of these samples after the layer-transfer resulting in a surface recombination velocity lower than 38 cm/s. Copyright © 2006 John Wiley & Sons, Ltd. Terheiden, Barbara Autodiffusion : a novel method for emitter formation in crystalline silicon thin-film solar cells 2015-08-17T13:20:15Z 2007 Wolf, Andreas

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