Abstract
Over the last decade, significant improvements in cost reduction as well as in conversion efficiency increase were achieved in large-scale industrial production, making PV cost competitive with other means of electricity generation. In many regions worldwide, PV achieves the lowest levelized cost of electricity. Several different factors made this tremendous achievement possible-namely economy of scale, a lean and efficient production process, and high conversion efficiencies . In this work, some of the key concepts and methods are described based on Hanwha Q CELLS’ experience. The methods and approaches for the fast transfer of cell technologies from laboratory to production and for accelerated progress in cell efficiency, quality, and reliability of the cell and module product are described. Over the last decade, the cell conversion efficiency increased by 0.5%abs per year. Currently, average cell conversion efficiencies exceeding 20% using boron-doped p-type multicrystalline (mc-Si) and 22%, using Czochralski-grown silicon (Cz-Si) substrates, are achieved on a multi-GW scale. Currently (as of Jan 2018) produced Q.ANTUM solar modules from these cells exhibit output powers of 325 Wp based on 120 half Cz cells and of 350 Wp based on 72 full multicrystalline cells. Besides just the performance, it is critical to investigate the reliability of solar modules based on p-type solar cells with dielectrically passivated rear. In terms of reliability, light-induced degradation (LID) is examined in detail, with conditions relevant for the activation of both the boron–oxygen (BO) defect, and “Light and Elevated Temperature Induced Degradation” (LeTID). While the formation of the BO defect has been considered the most prominent LID mechanism in boron-doped p-type Cz-Si , recently it was shown that LeTID is another important issue for passivated emitter and rear cells (PERC) on both mc-Si and Cz substrates. When not adequately suppressed, LeTID can occur on p-type PERC with degradation in output power of >6%; critically, it cannot be suppressed in a straightforward manner by conventional processing steps used to permanently deactivate the BO defect. In contrast to conventional PERC, Hanwha Q CELLS’ Q.ANTUM technology is shown to reliably suppress both LID due to BO defect formation and LeTID, for both p-type mc-Si and Cz-Si substrates.
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References
P. Engelhart et al., Q.ANTUM—Q-Cells Next Generation High-Power Silicon Cell & Module Concept, in Proceedings of the 26th European Photovoltaic Solar Energy Conference and Exhibition, Hamburg, Germany (2011), pp. 821–826
S. Engelhart et al., 3 years of high quality mc-Si Q-ANTUM production experience—approaches for efficient cell and module development, in Proceedings of the 31st European Photovoltaic Solar Energy Conference and Exhibition, Hamburg, Germany (2015), pp. 273–278
International Technology Roadmap for Photovoltaic (ITRPV): 2013 Results, Fifth Edition, Revision 1, March 2014. http://www.itrpv.net/
International Technology Roadmap for Photovoltaic (ITRPV): 2016 Results, Eighth Edition, March 2017. http://www.itrpv.net/
A.W. Blakers, A. Wang, A.M. Milne, J. Zhao, M.A. Green, 22.8% efficient silicon solar cell. Appl. Phys. Lett. 55(13), 1363 (1989)
S. Rein, T. Rehrl, W. Warta, S.W. Glunz, G. Willeke, Electrical and thermal properties of the metastable defect in boron-doped Czochralski silicon (Cz-Si), in Proceedings of the 17th European Photovoltaic Solar Energy Conference, Munich, Germany (2001), pp. 1555–1560
J. Schmidt, K. Bothe, Structure and transformation of the metastable boron- and oxygen-related defect center in crystalline silicon. Phys. Rev. B 69(2), 24107 (2004)
V.V. Voronkov, R. Falster, Latent complexes of interstitial boron and oxygen dimers as a reason for degradation of silicon-based solar cells. J. Appl. Phys. 107(5), 53509 (2010)
K. Ramspeck et al., Light induced degradation of rear passivated mc-Si solar cells, in Proceedings of the 27th European Photovoltaic Solar Conference and Exhibition, Frankfurt, Germany (2012), pp. 861–865
F. Fertig, K. Krauß, S. Rein, Light-induced degradation of PECVD aluminium oxide passivated silicon solar cells. Phys. Stat. Sol. (RRL) 9(1), 41–46 (2015)
F. Kersten et al., Degradation of multicrystalline silicon solar cells and modules after illumination at elevated temperature. Sol. Energy Mater. Sol. Cells 142, 83–86 (2015)
Fertig et al., Mass production of p-type Cz silicon solar cells approaching average stable conversion efficiencies of 22%. Energy Procedia 124, 338–345 (2017)
F. Kersten et al., System performance loss due to LeTID. Energy Procedia 124, 540–546 (2017)
S. Wanka et al., Tra.Q—laser marking for single wafer identification—production experience from 100 million wafers, in Proceedings of the 26th European Photovoltaic Solar Energy Conference and Exhibition, Hamburg, Germany (2011), pp. 1104–1107
A. Mohr et al., 20%-efficient rear side passivated solar cells in pilot series designed for conventional module assembly, in Proceedings of the 26th European Photovoltaic Solar Energy Conference and Exhibition, Hamburg, Germany (2011), pp. 2150–2153
M. Schaper et al., The Q.ANTUM technology platform applied to p-Cz to maintain constant efficiency increase per year, in Proceedings of the 32nd European Photovoltaic Solar Energy Conference and Exhibition, Munich, Germany (2016)
J. Walter, M. Tranitz, M. Volk, C. Ebert, U. Eitner, Multi-wire interconnection of busbar-free solar cells. Energy Procedia 55, 380–388 (2014)
S. Braun, G. Hahn, R. Nissler, C. Pönisch, D. Habermann, Multi-busbar solar cells and modules: high efficiencies and low silver consumption. Energy Procedia 38, 334–339 (2013)
T. Söderström, P. Paper, J. Ufheil, Smart wire connection technology, in Proceedings of the 28th European Photovoltaics Solar Energy Conference and Exhibition, Paris, France (2013), pp. 495–499
A. Schneider, L. Rubin, G. Rubin, Solar cell efficiency improvement by new metallization techniques—the Day4 electrode concept, in Proceedings of the 4th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI, USA (2006), pp. 1095–1098
J. Zhao et al., High efficiency PERT cells on n-type silicon substrates, in Conference Record of the 29th IEEE Photovoltaic Specialists Conference, New Orleans, LA, USA (2002), pp. 218–221
K. Yoshikawa et al., Silicon heterojunction solar cell with interdigitated back contacts for a photoconversion efficiency over 26%. Nat. Energy 2, 17032 (2017)
K. Masuko et al., Achievement of more than 25% conversion efficiency with crystalline silicon heterojunction solar cell. IEEE J. Photov. 4(6), 1433–1435 (2014)
M. Tanaka et al., Development of new a-Si/c-Si heterojunction solar cells: ACJ-HIT (Artificially Constructed Junction-Heterojunction with Intrinsic Thin-Layer). Jpn. J. Appl. Phys. 31, Part 1, No. 11, 3518–3522 (1992)
S. de Wolf, A. Descoeudres, Z.C. Holman, C. Ballif, High-efficiency silicon heterojunction solar cells: a review. Green 2(1), 7–24 (2012)
E. van Kerschaver, G. Beaucarne, Back-contact solar cells: a review. Prog. Photovolt Res. Appl. 14(2), 107–123 (2006)
D.D. Smith, Silicon solar cells with total area efficiency over 25%, in Proceedings of the 42nd IEEE Photovoltaics Specialists Conference, Portland, Oregon, USA, 2016
M.D. Lammert, R.J. Schwartz, The interdigitated back contact solar cell: a silicon solar cell for use in concentrated sunlight. IEEE Trans. Electron Devices 24(4), 337–342 (1977)
R.M. Swanson et al., Point-contact silicon solar cells. IEEE Trans. Electron Devices 31(5), 661–664 (1984)
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The author acknowledges the staff of the R&D department and production at Hanwha Q CELLS for their contribution to this work.
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Müller, J.W. (2020). High Efficient, Cost-Effective, and Reliable Silicon Solar Cells and Modules in Mass Production. In: Petrova-Koch, V., Hezel, R., Goetzberger, A. (eds) High-Efficient Low-Cost Photovoltaics. Springer Series in Optical Sciences, vol 140. Springer, Cham. https://doi.org/10.1007/978-3-030-22864-4_6
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