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Publikasjoner (10 av 17) Visa alla publikasjoner
Adamczyk, K., Søndenå, R., You, C. C., Stokkan, G., Lindroos, J., Rinio, M. & Di Sabatino, M. (2018). Recombination Strength of Dislocations in High-Performance Multicrystalline/Quasi-Mono Hybrid Wafers During Solar Cell Processing. Physica Status Solidi (a) applications and materials science, 215(2), Article ID 1700493.
Åpne denne publikasjonen i ny fane eller vindu >>Recombination Strength of Dislocations in High-Performance Multicrystalline/Quasi-Mono Hybrid Wafers During Solar Cell Processing
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2018 (engelsk)Inngår i: Physica Status Solidi (a) applications and materials science, ISSN 1862-6300, E-ISSN 1862-6319, Vol. 215, nr 2, artikkel-id 1700493Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Wafers from a hybrid silicon ingot seeded in part for High Performance Multicrystalline, in part for a quasi-mono structure, are studied in terms of the effect of gettering and hydrogenation on their final Internal Quantum Efficiency.The wafers are thermally processed in different groups – gettered and hydrogenated. Afterwards, a low temperature heterojunction with intrinsic thin layer cell process is applied to minimize the impact of temperature. Such procedure made it possible to study the effect of different processing steps on dislocation clusters in the material using the Light Beam Induced Current technique with a high spatial resolution. The dislocation densities are measuredusing automatic image recognition on polished and etched samples. The dislocation recombination strengths are obtained by a correlation of the IQE with the dislocation density according to the Donolato model. Different clusters are compared after different process steps. The results show that for the middle of the ingot, the gettering step can increase the recombination strength of dislocations by one order of magnitude. A subsequent passivation with layers containing hydrogen can lead to a decrease in the recombination strength to levels lower than in ungettered samples.

sted, utgiver, år, opplag, sider
Weinheim: Wiley-VCH Verlagsgesellschaft, 2018
Emneord
recombination dislocation crystallization solar-cell
HSV kategori
Forskningsprogram
Fysik
Identifikatorer
urn:nbn:se:kau:diva-65252 (URN)10.1002/pssa.201700493 (DOI)000423223700005 ()
Forskningsfinansiär
Swedish Energy Agency, 40184-1
Tilgjengelig fra: 2017-11-22 Laget: 2017-11-22 Sist oppdatert: 2019-11-08bibliografisk kontrollert
Lindroos, J., Petter, K., Sporleder, K., Turek, M., Pacho, P. & Rinio, M. (2017). Light beam induced current of light-induced degradation in high-performance multicrystalline Al-BSF cells.. In: Ralf Preu (Ed.), Proceedings of the 7th International Conference on Silicon Photovoltaics, SiliconPV 2017, 3-5 April 2017, Freiburg, Germany: . Paper presented at 7th International Conference on Silicon Photovoltaics, SiliconPV 2017, 3-5 April 2017, Freiburg, Germany (pp. 99-106). Elsevier, 124
Åpne denne publikasjonen i ny fane eller vindu >>Light beam induced current of light-induced degradation in high-performance multicrystalline Al-BSF cells.
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2017 (engelsk)Inngår i: Proceedings of the 7th International Conference on Silicon Photovoltaics, SiliconPV 2017, 3-5 April 2017, Freiburg, Germany / [ed] Ralf Preu, Elsevier, 2017, Vol. 124, s. 99-106Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Sponge-LID decreases the Al-BSF cell efficiency by up to 10 %rel. and is only partially recoverable at 200°C. This contributionshows that Sponge-LID occurs at and near most grain boundaries, but only in the centre of the affected cell.  Furthermore,Sponge-LID is not the only type of LID in the silicon bulk. High-resolution Light Beam Induced Current mapping reveals localinternal quantum efficiency losses of up to 8 %rel. at dislocation clusters and small angle grain boundaries, which recover(nearly) fully at 200°C. Nevertheless, this dislocation-related LID appears to reduce the Al-BSF efficiency by less than 1 %rel.

sted, utgiver, år, opplag, sider
Elsevier, 2017
Emneord
solar cell, silicon, quantum efficiency
HSV kategori
Forskningsprogram
Fysik
Identifikatorer
urn:nbn:se:kau:diva-63996 (URN)10.1016/j.egypro.2017.09.327 (DOI)000426791600014 ()
Konferanse
7th International Conference on Silicon Photovoltaics, SiliconPV 2017, 3-5 April 2017, Freiburg, Germany
Tilgjengelig fra: 2017-09-26 Laget: 2017-09-26 Sist oppdatert: 2019-10-14
Inglese, A., Focareta, A., Schindler, F., Schön, J., Lindroos, J., Schubert, M. C. & Savin, H. (2016). Light-induced degradation in multicrystalline silicon: the role of copper. In: Ribeyron, PJ; Cuevas, A; Weeber, A; Ballif, C; Glunz, S; Poortmans, J; Brendel, R; Aberle, A; Sinton, R; Verlinden, P; Hahn, G (Ed.), PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON CRYSTALLINE SILICON PHOTOVOLTAICS (SILICONPV 2016): . Paper presented at 6th International Conference on Crystalline Silicon Photovoltaics (SiliconPV; CEA INES, Chambery, FRANCE; MAR 07-09, 2016 (pp. 808-814). Elsevier, 92
Åpne denne publikasjonen i ny fane eller vindu >>Light-induced degradation in multicrystalline silicon: the role of copper
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2016 (engelsk)Inngår i: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON CRYSTALLINE SILICON PHOTOVOLTAICS (SILICONPV 2016) / [ed] Ribeyron, PJ; Cuevas, A; Weeber, A; Ballif, C; Glunz, S; Poortmans, J; Brendel, R; Aberle, A; Sinton, R; Verlinden, P; Hahn, G, Elsevier, 2016, Vol. 92, s. 808-814Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In this contribution, we provide an insight into the light-induced degradation of multicrystalline (mc-) silicon caused by copper contamination. Particularly we analyze the degradation kinetics of intentionally contaminated B- and Ga-doped mc-Si through spatially resolved photoluminescence (PL) imaging. Our results show that even small copper concentrations are capable of causing a strong LID effect in both B- and Ga-doped samples. Furthermore, the light intensity, the dopant and the grain quality were found to strongly impact the degradation kinetics, since faster LID was observed with stronger illumination intensity, B-doping and in the grains featuring low initial lifetime. Interestingly after degradation we also observe the formation of bright denuded zones near the edges of the B-doped grains, which might indicate the possible accumulation of copper impurities at the grain boundaries.

sted, utgiver, år, opplag, sider
Elsevier, 2016
Serie
Energy Procedia, ISSN 1876-6102
Emneord
light-induced degradation, multicrystalline silicon, copper metal impurities
HSV kategori
Forskningsprogram
Fysik
Identifikatorer
urn:nbn:se:kau:diva-46917 (URN)10.1016/j.egypro.2016.07.073 (DOI)000387703900113 ()
Konferanse
6th International Conference on Crystalline Silicon Photovoltaics (SiliconPV; CEA INES, Chambery, FRANCE; MAR 07-09, 2016
Tilgjengelig fra: 2016-10-21 Laget: 2016-10-21 Sist oppdatert: 2019-06-17bibliografisk kontrollert
Inglese, A., Lindroos, J., Vahlman, H. & Savin, H. (2016). Recombination activity of light-activated copper defects in p-type siliconstudied by injection- and temperature-dependent lifetime spectroscopy. Journal of Applied Physics, 120(12), Article ID 125703.
Åpne denne publikasjonen i ny fane eller vindu >>Recombination activity of light-activated copper defects in p-type siliconstudied by injection- and temperature-dependent lifetime spectroscopy
2016 (engelsk)Inngår i: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 120, nr 12, artikkel-id 125703Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
American Institute of Physics (AIP), 2016
Emneord
Copper, Temperature measurement, Diode pumped lasers, Carrier lifetimes, Crystal defects
HSV kategori
Forskningsprogram
Fysik
Identifikatorer
urn:nbn:se:kau:diva-46916 (URN)10.1063/1.4963121 (DOI)000385560700072 ()
Tilgjengelig fra: 2016-10-21 Laget: 2016-10-21 Sist oppdatert: 2019-06-17bibliografisk kontrollert
Lindroos, J. & Savin, H. (2016). Review of light-induced degradation in crystalline silicon solar cells. Solar Energy Materials and Solar Cells, 147, 115-126
Åpne denne publikasjonen i ny fane eller vindu >>Review of light-induced degradation in crystalline silicon solar cells
2016 (engelsk)Inngår i: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 147, s. 115-126Artikkel, forskningsoversikt (Fagfellevurdert) Published
Abstract [en]

Although several advances have been made in the characterization and the mitigation of light-induced degradation (LID), industrial silicon solar cells still suffer from different types of light-induced efficiency losses. This review compiles four decades of LID results in both electronic- and solar-grade crystalline silicon. The review focuses on the properties and the defect models of boron-oxygen LID and copper-related LID. Current techniques for LID mitigation are presented in order to reduce cell degradation and separate copper-related LID from boron-oxygen LID. Finally, the review summarizes recent observations of severe LID in modern multicrystalline silicon solar cells.

Emneord
boron, copper, degradation, oxygen, silicon, solar cell
HSV kategori
Forskningsprogram
Fysik
Identifikatorer
urn:nbn:se:kau:diva-38954 (URN)10.1016/j.solmat.2015.11.047 (DOI)000370305600014 ()
Tilgjengelig fra: 2016-01-04 Laget: 2016-01-04 Sist oppdatert: 2017-12-01bibliografisk kontrollert
Inglese, A., Lindroos, J. & Savin, H. (2015). Accelerated light-induced degradation for detecting copper contamination in p-type silicon. Applied Physics Letters, 107(5), Article ID 052101.
Åpne denne publikasjonen i ny fane eller vindu >>Accelerated light-induced degradation for detecting copper contamination in p-type silicon
2015 (engelsk)Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 107, nr 5, artikkel-id 052101Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
American Institute of Physics (AIP), 2015
Emneord
copper, illumination, silicon, interstitial defects, dissociation
HSV kategori
Identifikatorer
urn:nbn:se:kau:diva-37273 (URN)10.1063/1.4927838 (DOI)000359375700017 ()
Tilgjengelig fra: 2015-08-04 Laget: 2015-08-04 Sist oppdatert: 2017-07-03bibliografisk kontrollert
Lindroos, J. (2015). Copper-related light-induced degradation in crystalline silicon. (Doctoral dissertation). Helsinki: Unigrafia
Åpne denne publikasjonen i ny fane eller vindu >>Copper-related light-induced degradation in crystalline silicon
2015 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Helsinki: Unigrafia, 2015
Serie
Aalto University publication series DOCTORAL DISSERTATIONS, ISSN 1799-4942 ; 37/2015
Emneord
copper, degradation, lifetime, nickel, silicon, degradering, kisel, koppar, livstid, nickel
HSV kategori
Identifikatorer
urn:nbn:se:kau:diva-37275 (URN)978-952-60-6130-6 (ISBN)
Disputas
2015-04-24, Hall E, Aalto University School of Electrical Engineering, Espoo, Finland, 12:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2015-08-05 Laget: 2015-08-04 Sist oppdatert: 2015-08-05bibliografisk kontrollert
Boulfrad, Y., Lindroos, J., Wagner, M., Wolny, F., Yli-Koski, M. & Savin, H. (2014). Experimental evidence on removing copper and light-induced degradation from silicon by negative charge. Applied Physics Letters, 105(18), Article ID 182108.
Åpne denne publikasjonen i ny fane eller vindu >>Experimental evidence on removing copper and light-induced degradation from silicon by negative charge
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2014 (engelsk)Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 105, nr 18, artikkel-id 182108Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
American Institute of Physics (AIP), 2014
HSV kategori
Identifikatorer
urn:nbn:se:kau:diva-37260 (URN)10.1063/1.4901533 (DOI)000345000000042 ()
Tilgjengelig fra: 2015-08-03 Laget: 2015-08-03 Sist oppdatert: 2017-12-04bibliografisk kontrollert
Lindroos, J. & Savin, H. (2014). Formation kinetics of copper-related light-induced degradation in crystalline silicon. Journal of Applied Physics, 116(23), Article ID 234901.
Åpne denne publikasjonen i ny fane eller vindu >>Formation kinetics of copper-related light-induced degradation in crystalline silicon
2014 (engelsk)Inngår i: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 116, nr 23, artikkel-id 234901Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
American Institute of Physics (AIP), 2014
HSV kategori
Forskningsprogram
Fysik
Identifikatorer
urn:nbn:se:kau:diva-37261 (URN)10.1063/1.4904197 (DOI)000346634500047 ()
Tilgjengelig fra: 2015-08-03 Laget: 2015-08-03 Sist oppdatert: 2017-12-04bibliografisk kontrollert
Lindroos, J., Boulfrad, Y., Yli-Koski, M. & Savin, H. (2014). Preventing light-induced degradation in multicrystalline silicon. Journal of Applied Physics, 115(15), Article ID 154902.
Åpne denne publikasjonen i ny fane eller vindu >>Preventing light-induced degradation in multicrystalline silicon
2014 (engelsk)Inngår i: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 115, nr 15, artikkel-id 154902Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
American Institute of Physics (AIP), 2014
HSV kategori
Forskningsprogram
Fysik
Identifikatorer
urn:nbn:se:kau:diva-37259 (URN)10.1063/1.4871404 (DOI)000335227100056 ()
Tilgjengelig fra: 2015-08-03 Laget: 2015-08-03 Sist oppdatert: 2017-12-04bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0002-4569-5788