Moly-poly solar cell: Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%

Pierpaolo Spinelli; Mike Ah Sen; Eelko G. Hoek; Benjamin W.J. Kikkert; Guangtao Yang; Olindo Isabella; Arthur W. Weeber; Paula C.P. Bronsveld

doi:10.1063/1.5049284

Moly-poly solar cell: Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%

Pierpaolo Spinelli^*, Mike Ah Sen, Eelko G. Hoek, Benjamin W.J. Kikkert, Guangtao Yang, Olindo Isabella, Arthur W. Weeber, Paula C.P. Bronsveld

^*Corresponding author for this work

Photovoltaic Materials and Devices

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

5 Citations (Scopus)

Abstract

We present large-area "moly-poly" cells, with a front side MoO_x/a-Si:H(i) passivating contact and a rear-side poly-Si/SiO_x stack, and we have demonstrated that MoO_x based c-Si solar cell technology can be scaled to industrial wafer size. Excellent surface passivation was achieved using MoO_x and poly-Si, leading to implied V_oc values above 700 mV, and a final cell V_oc of 687 mV. However, some care needs to be taken to avoid parasitic optical losses in the infra-red (IR) spectral range due to free-carrier absorption (FCA). These losses were investigated by comparing poly-Si layers of different thicknesses, deposited by low-pressure or plasma-enhanced chemical vapor deposition (LPCVD or PECVD), at the rear side of moly-poly cells. We found that ultra-thin PECVD layers are most suitable for solar cell applications due to a very good trade-off between surface passivation and reduced FCA. Based on this result, a 18.1% efficient 9.2 × 9.2 cm² moly-poly cell was made, which is the highest reported efficiency so far for moly-poly cells. Finally, we present a preliminary study of the parasitic IR losses in the MoO_x layer itself, when deposited on either a-Si:H or SiO_x passivation layers.

Original language	English
Title of host publication	SiliconPV 2018, the 8th International Conference on Crystalline Silicon Photovoltaics
Editors	Rolf Brendel, Jef Poortmans, Arthur Weeber, Giso Hahn, Christophe Ballif, Stefan Glunz, Pierre-Jean Ribeyron
Publisher	American Institute of Physics
Number of pages	8
Volume	1999
ISBN (Print)	978-073541715-1
DOIs	https://doi.org/10.1063/1.5049284
Publication status	Published - 2018
Event	SiliconPV 2018: The 8th International Conference on Crystalline Silicon Photovoltaics - Lausanne, Switzerland Duration: 19 Mar 2018 → 21 Mar 2018

Conference

Conference	SiliconPV 2018: The 8th International Conference on Crystalline Silicon Photovoltaics
Country/Territory	Switzerland
City	Lausanne
Period	19/03/18 → 21/03/18

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10.1063/1.5049284

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Spinelli, P., Ah Sen, M., Hoek, E. G., Kikkert, B. W. J., Yang, G., Isabella, O., Weeber, A. W., & Bronsveld, P. C. P. (2018). Moly-poly solar cell: Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%. In R. Brendel, J. Poortmans, A. Weeber, G. Hahn, C. Ballif, S. Glunz, & P.-J. Ribeyron (Eds.), SiliconPV 2018, the 8th International Conference on Crystalline Silicon Photovoltaics (Vol. 1999). Article 040021 American Institute of Physics. https://doi.org/10.1063/1.5049284

Spinelli, Pierpaolo ; Ah Sen, Mike ; Hoek, Eelko G. et al. / Moly-poly solar cell : Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%. SiliconPV 2018, the 8th International Conference on Crystalline Silicon Photovoltaics. editor / Rolf Brendel ; Jef Poortmans ; Arthur Weeber ; Giso Hahn ; Christophe Ballif ; Stefan Glunz ; Pierre-Jean Ribeyron. Vol. 1999 American Institute of Physics, 2018.

@inproceedings{50aef804ca174bffad94d528d1b9ab5e,

title = "Moly-poly solar cell: Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%",

abstract = "We present large-area {"}moly-poly{"} cells, with a front side MoOx/a-Si:H(i) passivating contact and a rear-side poly-Si/SiOx stack, and we have demonstrated that MoOx based c-Si solar cell technology can be scaled to industrial wafer size. Excellent surface passivation was achieved using MoOx and poly-Si, leading to implied Voc values above 700 mV, and a final cell Voc of 687 mV. However, some care needs to be taken to avoid parasitic optical losses in the infra-red (IR) spectral range due to free-carrier absorption (FCA). These losses were investigated by comparing poly-Si layers of different thicknesses, deposited by low-pressure or plasma-enhanced chemical vapor deposition (LPCVD or PECVD), at the rear side of moly-poly cells. We found that ultra-thin PECVD layers are most suitable for solar cell applications due to a very good trade-off between surface passivation and reduced FCA. Based on this result, a 18.1% efficient 9.2 × 9.2 cm2 moly-poly cell was made, which is the highest reported efficiency so far for moly-poly cells. Finally, we present a preliminary study of the parasitic IR losses in the MoOx layer itself, when deposited on either a-Si:H or SiOx passivation layers.",

author = "Pierpaolo Spinelli and {Ah Sen}, Mike and Hoek, {Eelko G.} and Kikkert, {Benjamin W.J.} and Guangtao Yang and Olindo Isabella and Weeber, {Arthur W.} and Bronsveld, {Paula C.P.}",

year = "2018",

doi = "10.1063/1.5049284",

language = "English",

isbn = "978-073541715-1",

volume = "1999",

editor = "Rolf Brendel and Jef Poortmans and Arthur Weeber and Giso Hahn and Christophe Ballif and Stefan Glunz and Pierre-Jean Ribeyron",

booktitle = "SiliconPV 2018, the 8th International Conference on Crystalline Silicon Photovoltaics",

publisher = "American Institute of Physics",

address = "United States",

note = "SiliconPV 2018: The 8th International Conference on Crystalline Silicon Photovoltaics ; Conference date: 19-03-2018 Through 21-03-2018",

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Spinelli, P, Ah Sen, M, Hoek, EG, Kikkert, BWJ, Yang, G, Isabella, O , Weeber, AW & Bronsveld, PCP 2018, Moly-poly solar cell: Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%. in R Brendel, J Poortmans, A Weeber, G Hahn, C Ballif, S Glunz & P-J Ribeyron (eds), SiliconPV 2018, the 8th International Conference on Crystalline Silicon Photovoltaics. vol. 1999, 040021, American Institute of Physics, SiliconPV 2018: The 8th International Conference on Crystalline Silicon Photovoltaics, Lausanne, Switzerland, 19/03/18. https://doi.org/10.1063/1.5049284

Moly-poly solar cell: Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%. / Spinelli, Pierpaolo; Ah Sen, Mike; Hoek, Eelko G. et al.
SiliconPV 2018, the 8th International Conference on Crystalline Silicon Photovoltaics. ed. / Rolf Brendel; Jef Poortmans; Arthur Weeber; Giso Hahn; Christophe Ballif; Stefan Glunz; Pierre-Jean Ribeyron. Vol. 1999 American Institute of Physics, 2018. 040021.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Moly-poly solar cell

T2 - SiliconPV 2018: The 8th International Conference on Crystalline Silicon Photovoltaics

AU - Spinelli, Pierpaolo

AU - Ah Sen, Mike

AU - Hoek, Eelko G.

AU - Kikkert, Benjamin W.J.

AU - Yang, Guangtao

AU - Isabella, Olindo

AU - Weeber, Arthur W.

AU - Bronsveld, Paula C.P.

PY - 2018

Y1 - 2018

N2 - We present large-area "moly-poly" cells, with a front side MoOx/a-Si:H(i) passivating contact and a rear-side poly-Si/SiOx stack, and we have demonstrated that MoOx based c-Si solar cell technology can be scaled to industrial wafer size. Excellent surface passivation was achieved using MoOx and poly-Si, leading to implied Voc values above 700 mV, and a final cell Voc of 687 mV. However, some care needs to be taken to avoid parasitic optical losses in the infra-red (IR) spectral range due to free-carrier absorption (FCA). These losses were investigated by comparing poly-Si layers of different thicknesses, deposited by low-pressure or plasma-enhanced chemical vapor deposition (LPCVD or PECVD), at the rear side of moly-poly cells. We found that ultra-thin PECVD layers are most suitable for solar cell applications due to a very good trade-off between surface passivation and reduced FCA. Based on this result, a 18.1% efficient 9.2 × 9.2 cm2 moly-poly cell was made, which is the highest reported efficiency so far for moly-poly cells. Finally, we present a preliminary study of the parasitic IR losses in the MoOx layer itself, when deposited on either a-Si:H or SiOx passivation layers.

AB - We present large-area "moly-poly" cells, with a front side MoOx/a-Si:H(i) passivating contact and a rear-side poly-Si/SiOx stack, and we have demonstrated that MoOx based c-Si solar cell technology can be scaled to industrial wafer size. Excellent surface passivation was achieved using MoOx and poly-Si, leading to implied Voc values above 700 mV, and a final cell Voc of 687 mV. However, some care needs to be taken to avoid parasitic optical losses in the infra-red (IR) spectral range due to free-carrier absorption (FCA). These losses were investigated by comparing poly-Si layers of different thicknesses, deposited by low-pressure or plasma-enhanced chemical vapor deposition (LPCVD or PECVD), at the rear side of moly-poly cells. We found that ultra-thin PECVD layers are most suitable for solar cell applications due to a very good trade-off between surface passivation and reduced FCA. Based on this result, a 18.1% efficient 9.2 × 9.2 cm2 moly-poly cell was made, which is the highest reported efficiency so far for moly-poly cells. Finally, we present a preliminary study of the parasitic IR losses in the MoOx layer itself, when deposited on either a-Si:H or SiOx passivation layers.

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U2 - 10.1063/1.5049284

DO - 10.1063/1.5049284

M3 - Conference contribution

AN - SCOPUS:85051930790

SN - 978-073541715-1

VL - 1999

BT - SiliconPV 2018, the 8th International Conference on Crystalline Silicon Photovoltaics

A2 - Brendel, Rolf

A2 - Poortmans, Jef

A2 - Weeber, Arthur

A2 - Hahn, Giso

A2 - Ballif, Christophe

A2 - Glunz, Stefan

A2 - Ribeyron, Pierre-Jean

PB - American Institute of Physics

Y2 - 19 March 2018 through 21 March 2018

ER -

Spinelli P, Ah Sen M, Hoek EG, Kikkert BWJ, Yang G, Isabella O et al. Moly-poly solar cell: Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%. In Brendel R, Poortmans J, Weeber A, Hahn G, Ballif C, Glunz S, Ribeyron PJ, editors, SiliconPV 2018, the 8th International Conference on Crystalline Silicon Photovoltaics. Vol. 1999. American Institute of Physics. 2018. 040021 doi: 10.1063/1.5049284

Moly-poly solar cell: Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%

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