Enhanced conversion efficiencies for pillar array solar cells fabricated from crystalline silicon with short minority carrier diffusion lengths

Heayoung P. Yoon; Yu A. Yuwen; Chito E. Kendrick; Greg D. Barber; Nikolas J. Podraza; Joan M. Redwing; Thomas E. Mallouk; Christopher R. Wronski; Theresa S. Mayer

doi:10.1063/1.3432449

Enhanced conversion efficiencies for pillar array solar cells fabricated from crystalline silicon with short minority carrier diffusion lengths

Heayoung P. Yoon, Yu A. Yuwen, Chito E. Kendrick, Greg D. Barber, Nikolas J. Podraza, Joan M. Redwing, Thomas E. Mallouk, Christopher R. Wronski, Theresa S. Mayer

Research output: Contribution to journal › Article › peer-review

117 Scopus citations

Abstract

Radial n+-p+ junction solar cells composed of densely packed pillar arrays, 25-μm-tall and 7.5 μm in diameter, fabricated from p-type silicon substrates with extremely short minority carrier diffusion lengths are investigated and compared to planar cells. To understand the two times higher AM 1.5 efficiencies of the pillar array cells, dark and light I-V characteristics as well as spectral responses are presented for the two structures. The higher pillar array cell efficiencies are due to the larger short-circuit currents from the larger photon absorption thickness and the shorter carrier collection length, with a significant additional contribution from multiple reflections in the structure.

Original language	English (US)
Article number	213503
Journal	Applied Physics Letters
Volume	96
Issue number	21
DOIs	https://doi.org/10.1063/1.3432449
State	Published - May 24 2010

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3432449

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Yoon, H. P., Yuwen, Y. A., Kendrick, C. E., Barber, G. D., Podraza, N. J., Redwing, J. M., Mallouk, T. E., Wronski, C. R., & Mayer, T. S. (2010). Enhanced conversion efficiencies for pillar array solar cells fabricated from crystalline silicon with short minority carrier diffusion lengths. Applied Physics Letters, 96(21), Article 213503. https://doi.org/10.1063/1.3432449

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title = "Enhanced conversion efficiencies for pillar array solar cells fabricated from crystalline silicon with short minority carrier diffusion lengths",

abstract = "Radial n+-p+ junction solar cells composed of densely packed pillar arrays, 25-μm-tall and 7.5 μm in diameter, fabricated from p-type silicon substrates with extremely short minority carrier diffusion lengths are investigated and compared to planar cells. To understand the two times higher AM 1.5 efficiencies of the pillar array cells, dark and light I-V characteristics as well as spectral responses are presented for the two structures. The higher pillar array cell efficiencies are due to the larger short-circuit currents from the larger photon absorption thickness and the shorter carrier collection length, with a significant additional contribution from multiple reflections in the structure.",

author = "Yoon, {Heayoung P.} and Yuwen, {Yu A.} and Kendrick, {Chito E.} and Barber, {Greg D.} and Podraza, {Nikolas J.} and Redwing, {Joan M.} and Mallouk, {Thomas E.} and Wronski, {Christopher R.} and Mayer, {Theresa S.}",

note = "Funding Information: This work was supported by U.S. Department of Energy under Contract No. DE-PS36-07GO97025 and the use of facilities at the Penn State Site of the NSF NNIN under Agreement No. 0335765. The authors thank H. Shen and E. C. Dickey for assistance in optical analysis and T. N. Jackson for valuable discussions.",

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doi = "10.1063/1.3432449",

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AU - Yoon, Heayoung P.

AU - Yuwen, Yu A.

AU - Kendrick, Chito E.

AU - Barber, Greg D.

AU - Podraza, Nikolas J.

AU - Redwing, Joan M.

AU - Mallouk, Thomas E.

AU - Wronski, Christopher R.

AU - Mayer, Theresa S.

N1 - Funding Information: This work was supported by U.S. Department of Energy under Contract No. DE-PS36-07GO97025 and the use of facilities at the Penn State Site of the NSF NNIN under Agreement No. 0335765. The authors thank H. Shen and E. C. Dickey for assistance in optical analysis and T. N. Jackson for valuable discussions.

PY - 2010/5/24

Y1 - 2010/5/24

N2 - Radial n+-p+ junction solar cells composed of densely packed pillar arrays, 25-μm-tall and 7.5 μm in diameter, fabricated from p-type silicon substrates with extremely short minority carrier diffusion lengths are investigated and compared to planar cells. To understand the two times higher AM 1.5 efficiencies of the pillar array cells, dark and light I-V characteristics as well as spectral responses are presented for the two structures. The higher pillar array cell efficiencies are due to the larger short-circuit currents from the larger photon absorption thickness and the shorter carrier collection length, with a significant additional contribution from multiple reflections in the structure.

AB - Radial n+-p+ junction solar cells composed of densely packed pillar arrays, 25-μm-tall and 7.5 μm in diameter, fabricated from p-type silicon substrates with extremely short minority carrier diffusion lengths are investigated and compared to planar cells. To understand the two times higher AM 1.5 efficiencies of the pillar array cells, dark and light I-V characteristics as well as spectral responses are presented for the two structures. The higher pillar array cell efficiencies are due to the larger short-circuit currents from the larger photon absorption thickness and the shorter carrier collection length, with a significant additional contribution from multiple reflections in the structure.

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Enhanced conversion efficiencies for pillar array solar cells fabricated from crystalline silicon with short minority carrier diffusion lengths

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