Publications

silicon

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Ten-percent solar-to-fuel conversion with nonprecious materials

C.R. Cox, J.Z. Lee, D.G. Nocera, and T. Buonassisi
Proceedings of the National Academy of Sciences 111, 14057 (2014)
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Decoupling surface- and bulk-limited lifetimes in 100-μm thin silicon using transient absorption pump-probe spectroscopy

S.C. Siah, C.B. Simmons, J. Hofstetter, M.T. Winkler, and T. Buonassisi
Proc. 39th IEEE Photovoltaic Specialists Conference, Tampa, FL, USA (2013)
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Toward defining tolerances for structural defects in silicon through 2D and 3D device simulations

D. Berney Needleman, and T. Buonassisi
Proc. 39th IEEE Photovoltaic Specialists Conference, Tampa, FL, USA (2013)
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Organic vapor passivation of silicon at room temperature

R. Yang, T. Buonassisi, and K.K. Gleason
Advanced Materials 25, 2078–2083 (2013)
Featured in MIT News
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Co-optimizing crystalline silicon solar cell throughput and efficiency using continuously ramping phosphorus diffusion profiles

A.E. Morishige, D.P. Fenning, J. Hofstetter, and T. Buonassisi
Materials Research Society Fall Meeting & Exhibit, Boston, MA (2012)
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Raman study of localized recrystallization of amorphous silicon induced by laser beam

N. Tabet, A. Al-Sayoud, S. Said, X. Yang, Y. Yang, A. Syed, E.-H. Diallo, Z. Wang, X. Wang, E.C. Johlin, C.B. Simmons, and T. Buonassisi
Proc. 38th IEEE Photovoltaic Specialists Conference, Austin, TX, USA (2011)
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Deployment of impurity-to-efficiency (I2E) simulation tool

D.M. Powell, D.P. Fenning, V. Rose, M. Holt, J. Maser, and T. Buonassisi
Proc. 37th IEEE Photovoltaic Specialists Conference Seattle, WA, USA (2011)
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Synchrotron-based characterization of solar cell nanodefects

M.I. Bertoni, D.P. Fenning, V. Rose, M. Holt, J. Maser, and T. Buonassisi
Proc. 37th IEEE Photovoltaic Specialists Conference, Seattle, WA, USA (2011)
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Effective iron gettering in lightly-doped emitters

D.P. Fenning, and T. Buonassisi
Proc. 37th IEEE Photovoltaic Specialists Conference, Seattle, WA, USA (2011)
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Stress and temperature coupling effects on dislocation density reduction in multicrystalline silicon

S. Castellanos, M.I. Bertoni, M.L. Vogl, A. Fecych, and T. Buonassisi
Proc. 35th IEEE Photovoltaic Specialists Conference, Honolulu, HI, USA (2010)
See also: Journal Article
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Impact of defect type on hydrogen passivation effectiveness in multicrystalline silicon solar cells

M.I. Bertoni, S. Hudelson, B.K. Newman, S. Bernardis, D.P. Fenning, H.F.W. Dekkers, E. Cornagliotti, A.S. Zuschlag, G. Micard, G. Hahn, G. Coletti, B. Lai, and T. Buonassisi
Proc. 35th IEEE Photovoltaic Specialists Conference Honolulu, HI (2010)
See also: Journal Article
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Quantitative stress measurements of bulk microdefects in multicrystalline silicon

S. Schoenfelder, A. Sampson, V. Ganapati, R. Koepge, S. Castellanos, S. Oener, and T. Buonassisi
Proc. 24th European Photovoltaic Solar Energy Conference, Hamburg, Germany; pp.977-980. (2009)
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Mitigating the “iron problem” in crystalline silicon solar cells

S. Hudelson, S. Bernardis, Y.S. Lee, K. Hartman, M.I. Bertoni, B.K. Newman, M.A. Marcus, B. Lai, S. Vogt, Z. Cai, and T. Buonassisi
Proc. 23rd European Photovoltaic Solar Energy Conference, Valencia, Spain (2008)
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Defect redistribution by low temperature anneal in ingot silicon solar cells

M. Rinio, A. Yodyunyong, M. Pirker, S. Keipert, P. Wang, T. Buonassisi, and D. Borchert
Proc. 23rd European Photovoltaic Solar Energy Conference and Exhibition, Valencia, Spain (2008)
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Luminescence imaging

T. Trupke, R.A. Bardos, M.D. Abbott, E. Pink, Y. Augarten, F.W. Chen, J.E. Cotter, M. Kasemann, M.C. Schubert, M. The, S.W. Glunz, W. Warta, M. Rüdiger, E. Schäffer, P. Würfel, D. Macdonald, J. Tan, A. Cuevas, J. Bauer, O. Breitenstein, T. Buonassisi, A.M. Lorenz, and H.P. Hartmann
Proc. 22nd European Photovoltaic Solar Energy Conference and Exhibition, Milan, Italy (2007)
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Intermetallic phases and transition metal interaction in mc-silicon

M. Heuer, S. Langkau, T. Buonassisi, A.A. Istratov, A. Minor, and E.R. Weber
Proc. 22nd European Photovoltaic Solar Energy Conference and Exhibition, Milan, Italy (2007)
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Evolution of stresses in wafer bulks and edges during industrial solar cell processing

T. Buonassisi, S. Reitsma, R. Sweeney, M.D. Pickett, W. Huang, J. Lesniak, and M.L. Spencer
Proc. 22nd European Photovoltaic Solar Energy Conference and Exhibition, Milan, Italy (2007)
See also: Presentation
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From understanding towards engineering metal impurities in multicrystalline silicon

T. Buonassisi, A.A. Istratov, M. Heuer, M.D. Pickett, M.A. Marcus, B. Lai, S.M. Heald, and E.R. Weber
Proc. 21st European Photovoltaic Solar Energy Conference and Exhibition, Dresden, Germany; pp.696-699 (2006)
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Nature, impact, and remediation of the principal lifetime-limiting defects in String Ribbon material

T. Buonassisi, A.M. Lorenz, and G.J. Tarnowski
Proc. 21st European Photovoltaic Solar Energy Conference and Exhibition, Dresden, Germany; pp.1505–1507 (2006)
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Transition metal interaction and formation of intermetallic phases in multicrystalline silicon

M. Heuer, T. Buonassisi, M.A. Marcus, A.A. Istratov, M.D. Pickett, A. Minor, B. Lai, and E.R. Weber
Proc. 21st European Photovoltaic Solar Energy Conference and Exhibition, Dresden, Germany; pp.1105–1107 (2006)
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Metal particle evolution during solar cell processing in multicrystalline silicon

T. Buonassisi, M.D. Pickett, A.A. Istratov, E. Sauar, T.C. Lommasson, R.F. Clark, S. Narayanan, S.M. Heald, and E.R. Weber
(2005)
15th workshop on Crystalline Silicon Solar Cells & Modules: Materials and Processes, Editor: B.L.Sopori, NREL, Golden, CO, pp.174-177 (2005).
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Correlations between structural, impurity, and electrical properties in efficiency-limiting “defect bands” in string ribbon silicon

T. Buonassisi, G. Hahn, and A.M. Gabor
Proc. 20th European Photovoltaic Solar Energy Conference and Exhibition, Barcelona, Spain (2005)
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Technology choices for the PV industry: A comparative life cycle environmental impact perspective

T. Williams, S. Boyd, and T. Buonassisi
Proc. 20th European Photovoltaic Solar Energy Conference, Barcelona, Spain (2005)
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Distinguishing the impacts of individual metal species on multicrystalline silicon performance in a multiple metal environment

T. Buonassisi, A.A. Istratov, M. Heuer, M.D. Pickett, and E.R. Weber
Proc. 20th European Photovoltaic Solar Energy Conference, Barcelona, Spain (2005)
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Synchrotron-based investigations into metallic impurity distribution and defect engineering in multicrystalline silicon via thermal treatments

T. Buonassisi, A.A. Istratov, M.A. Marcus, S. Peters, C. Ballif, M. Heuer, T.F. Ciszek, Z. Cai, B. Lai, R. Schindler, and E.R. Weber
Proc. 31st IEEE Photovoltaic Specialists Conference, Lake Buena Vista, USA; pp.1027–1030 (2005)
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Impact of iron contamination in multicrystalline silicon solar cells: Origins, chemical states, and device impacts

T. Buonassisi, M. Heuer, A.A. Istratov, M.A. Marcus, R. Jonczyk, B. Lai, Z. Cai, J. Isenberg, W. Warta, R. Schindler, and E.R. Weber
Proc. 19th European Photovoltaic Solar Energy Conference, Paris, France; pp.488–491 (2004)
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Defects in the deteriorated border layer of block-cast multicrystalline silicon ingots

M. Rinio, C. Ballif, T. Buonassisi, and D. Borchert
Proc. 19th European Photovoltaic Solar Energy Conference, Paris, France; pp.762–765 (2004)
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Application of x-ray synchrotron techniques to the characterization of the chemical nature and recombination activity of grown-in and process-induced defects and impurities in solar cells

T. Buonassisi, O.F. Vyvenko, A.A. Istratov, E.R. Weber, and R. Schindler
MRS Symposium Proceedings 719, 179 (2002)
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Insights into the optimal phosphorus diffusion profile for silicon solar cells

D.P. Fenning, M.I. Bertoni, and T. Buonassisi

Proc. 24th European Photovoltaic Solar Energy Conference, Hamburg, Germany (2009) pp.1893-1896.
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Co-optimizing the phosphorous diffusion time-temperature profile for gettering and throughput

A.E. Morishige, D.P. Fenning, J. Hofstetter, and T. Buonassisi

5th International Workshop on Crystalline Silicon Solar Cells - CSSC-5 , Boston, USA 1–3 November (2011)
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Impurity analysis in silicon- and carbon-bearing raw feedstock materials

S. Bernardis, M.I. Bertoni, B.K. Newman, S.C. Fakra, M. Di Sabatino, R. Larsen, and T. Buonassisi

3rd International Workshop on Crystalline Silicon Solar Cells, Trondheim, Norway (2009).
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Electrical and mechanical defects in solar cell materials and devices

S. Hudelson, K. Hartman, Y.S. Lee, and T. Buonassisi

4th Workshop on the Future Direction of Photovoltaics, Japanese Society for the Promotion of Science, Tokyo, Japan (2008). Read the PDF
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Reducing the concentration of interstitial iron in crystalline silicon solar cells via low (≤ 500°C) temperature annealing

T. Buonassisi, M.D. Pickett, and R. Sweeney

17th workshop on Crystalline Silicon Solar Cells & Modules: Materials and Processes, Editor: B.L.Sopori, NREL, Golden, CO (2007). Read the PDF
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Synchrotron-based infrared spectromicroscopy of oxygen gettering by grain boundaries in multicrystalline silicon

M.D. Pickett, T. Buonassisi, A.A. Istratov, R.F. Clark, S. Narayanan, and E.R. Weber

15th workshop on Crystalline Silicon Solar Cells & Modules: Materials and Processes, Editor: B.L.Sopori, NREL, Golden, CO, pp.178-181 (2005).
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Efficiency-limiting ‘defect bands’ in string ribbon silicon: correlations between structural, impurity, and electrical properties

T. Buonassisi, G. Hahn, A.M. Gabor, J. Schischka, A.A. Istratov, M.D. Pickett, and E.R. Weber

15th workshop on Crystalline Silicon Solar Cells & Modules: Materials and Processes, Editor: B.L.Sopori, NREL, Golden, CO, pp.170-173 (2005).
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Synchrotron-based spectrally-resolved X-ray beam induced current: a technique to quantify the effect of metal-rich precipitates on minority carrier diffusion length in multicrystalline silicon

T. Buonassisi, A.A. Istratov, M.D. Pickett, M.A. Marcus, G. Hahn, S. Riepe, J. Isenberg, W. Warta, G. Willeke, T.F. Ciszek, and E.R. Weber

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Assessing the role of impurities in silicon nitride crucible lining material as a potential source of metal contamination in photovoltaic-grade ingot-cast multicrystalline silicon

T. Buonassisi, A.A. Istratov, M.D. Pickett, J. Rakotoniaina, O. Breitenstein, M.A. Marcus, S.M. Heald, and E.R. Weber

15th workshop on Crystalline Silicon Solar Cells & Modules: Materials and Processes, Editor: B.L.Sopori, NREL, Golden, CO, pp.162-165 (2005).
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EXAFS studies on Ni11.6Fe2.8Cu0.4Si27.6 precipitates in multicrystalline silicon

M. Heuer, T. Buonassisi, M.A. Marcus, A.A. Istratov, M.D. Pickett, and E.R. Weber

15th workshop on Crystalline Silicon Solar Cells & Modules: Materials and Processes, Editor: B.L.Sopori, NREL, Golden, CO, pp.158-161 (2005).
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Transition metals in silicon solar cells: sources of contamination, interactions, defect engineering

A.A. Istratov, T. Buonassisi, M. Heuer, M.D. Pickett, and E.R. Weber

15th workshop on Crystalline Silicon Solar Cells & Modules: Materials and Processes, Editor: B.L.Sopori, NREL, Golden, CO, pp.70-77 (2005).
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Improvement of solar grade silicon through defect control

A.A. Istratov, T. Buonassisi, and E.R. Weber

Freiberger Siliciumtage, Freiberg, Germany (2005).
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The impact of chemical state and thermal stability of metal precipitates on gettering efficiency in silicon

A.A. Istratov, T. Buonassisi, and E.R. Weber

Proc. 4th International Symposium on Advanced Science and Technology of Silicon Materials, Kona, Hawaii, USA (2004).
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The impact of metal impurity clusters on solar cell performance in multicrystalline silicon

T. Buonassisi, A.A. Istratov, and E.R. Weber

Proc. 2004 National Center for Photovoltaics Review Meeting, Denver, USA (2004).
 
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Differences and similarities between metal clusters in mc-Si materials from different manufacturers

T. Buonassisi, A.A. Istratov, T.F. Ciszek, D.W. Cunningham, A.M. Gabor, R. Jonczyk, R. Schindler, M. Sheoran, A. Upadhyaya, A. Rohatgi, B. Lai, Z. Cai, M.A. Marcus, and E.R. Weber

Proc. 14th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Winter Park, CO, pp.226-229 (2004).
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Aluminum gettering and dissolution of Cu3Si precipitates in silicon

T. Buonassisi, A.A. Istratov, and E.R. Weber

Proc. 14th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Winter Park, CO, pp.222-225 (2004).
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Stress-induced nitrogen and oxygen segregation and complexing investigated by high resolution synchrotron FTIR

A. Karoui, T. Buonassisi, F. Sahtout Karoui, G.A. Rozgony, M.C. Martin, E.R. Weber, and T.F. Ciszek

Proc. 14th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Winter Park, CO, pp.204-207 (2004).
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Dependence of precipitation behavior of Cu and Ni in CZ and multicrystalline silicon on cooling conditions

A.A. Istratov, T. Buonassisi, M.A. Marcus, T.F. Ciszek, and E.R. Weber

Proc. 14th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Winter Park, CO, pp.165-169 (2004).
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Distribution and chemical state of Cu-rich clusters in silicon

T. Buonassisi, M.A. Marcus, A.A. Istratov, M. Heuer, T.F. Ciszek, B. Lai, Z. Cai, and E.R. Weber

Proc. 14th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Winter Park, CO, pp.161-164 (2004).
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Transition metals in multicrystalline solar cells: Understanding the nature, origins and impacts of metal contamination in multicrystalline Si and minimizing its impact on solar cell performance

T. Buonassisi, A.A. Istratov, and E.R. Weber

Proc. 14th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Winter Park, CO, pp.17-26 (2004).
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Neutron activation analysis study of metal content of multicrystalline silicon for cost-efficient solar cells

A.A. Istratov, T. Buonassisi, R.J. McDonald, A.R. Smith, R. Schindler, J.A. Rand, J.P. Kalejs, and E.R. Weber

Proc. 13th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Vail, CO, pp.158-161 (2003).
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Experimental procedure for determination of the depth of metal clusters in XBIC/µ-XRF mapping of metal clusters in silicon solar cells

O.F. Vyvenko, T. Buonassisi, A.A. Istratov, and E.R. Weber

Proc. 13th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Vail, CO, pp.102-105 (2003).
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Statistically meaningful data on the chemical state of iron precipitates in processed multicrystalline silicon using synchrotron-based x-ray absorption spectroscopy

T. Buonassisi, M. Heuer, A.A. Istratov, E.R. Weber, Z. Cai, B. Lai, M.A. Marcus, J. Lu, G.A. Rozgony, R. Schindler, R. Jonczyk, and J. Rand

Proc. 13th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Vail, CO, pp.96-101 (2003).
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Impact of metal impurities on solar cell performance

A.A. Istratov, T. Buonassisi, E.R. Weber, R.J. McDonald, A.R. Smith, R. Schindler, J. Isenberg, J.P. Kalejs, J. Rand, P.Geiger, G. Hahn, J. Rakotoniaina, and O. Breitenstein

Proc. 2003 National Center for Photovoltaics Review Meeting, Denver, USA (2003).
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Application of synchrotron radiation based x-ray microprobe techniques for the analysis of recombination activity of metals precipitated at Si/SiGe misfit dislocations

O.F. Vyvenko, T. Buonassisi, A.A. Istratov, E.R. Weber, M. Kittler, and W. Seifert

Proc. 12th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Breckenridge, CO, pp.111-116 (2002).
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Application of x-ray fluorescence technique to studies of aluminum gettering in silicon


Proc. 12th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Breckenridge, CO, pp.271-274 (2002).
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Analysis of shunts in multicrystalline silicon solar cells using microprobe x-ray fluorescence technique

T. Buonassisi, O.F. Vyvenko, A.A. Istratov, E.R. Weber, R. Schindler, and G. Hahn

Proc. 12th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Breckenridge, CO, pp.266-270 (2002).
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Application of x-ray fluorescence microprobe technique for the analysis of fully processed solar cells

O.F. Vyvenko, A.A. Istratov, T. Buonassisi, E.R. Weber, and R. Schindler

Proc. 11th workshop on crystalline silicon solar cell materials and processes, B. L. Sopori, Editor, NREL, Golden, CO, pp.172-176 (2001).
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The bright future of silicon-based photovoltaics


Invited talk at the Intersolar North America Conference, San Francisco, California, USA (2008). Read the PDF
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Electrical and mechanical defects in solar cell materials and devices


Invited talk at the 4th Workshop on the Future Direction of Photovoltaics, Japanese Society for the Promotion of Science, Tokyo, Japan (2008). Read the PDF
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Evolution of stresses in wafer bulks and edges during industrial solar cell processing

T. Buonassisi, S. Reitsma, M.D. Pickett, W. Huang, J. Lesniak, and M.L. Spencer

Plenary presentation at the 22nd European Photovoltaic Solar Energy Conference and Exhibition, Milan, Italy (2007). Read the PDF