Si microwire-array solar cells

Morgan C. Putnam, Shannon W. Boettcher, Michael D. Kelzenberg, Daniel B. Turner-Evans, Joshua M. Spurgeon, Emily L. Warren, Ryan M. Briggs, Nathan S Lewis, Harry A. Atwater

Research output: Contribution to journalArticle

189 Citations (Scopus)

Abstract

Si microwire-array solar cells with Air Mass 1.5 Global conversion efficiencies of up to 7.9% have been fabricated using an active volume of Si equivalent to a 4 μm thick Si wafer. These solar cells exhibited open-circuit voltages of 500 mV, short-circuit current densities (Jsc) of up to 24 mA cm-2, and fill factors >65% and employed Al 2O3 dielectric particles that scattered light incident in the space between the wires, a Ag back reflector that prevented the escape of incident illumination from the back surface of the solar cell, and an a-SiN x:H passivation/anti-reflection layer. Wire-array solar cells without some or all of these design features were also fabricated to demonstrate the importance of the light-trapping elements in achieving a high Jsc. Scanning photocurrent microscopy images of the microwire-array solar cells revealed that the higher Jsc of the most advanced cell design resulted from an increased absorption of light incident in the space between the wires. Spectral response measurements further revealed that solar cells with light-trapping elements exhibited improved red and infrared response, as compared to solar cells without light-trapping elements.

Original languageEnglish
Pages (from-to)1037-1041
Number of pages5
JournalEnergy and Environmental Science
Volume3
Issue number8
DOIs
Publication statusPublished - 2010

Fingerprint

Solar cell arrays
Solar cells
Wire
trapping
Open circuit voltage
Photocurrents
Passivation
Short circuit currents
Conversion efficiency
Microscopic examination
Current density
Lighting
solar cell
density current
Infrared radiation
air mass
Scanning
microscopy
fill
Air

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Chemistry
  • Pollution
  • Nuclear Energy and Engineering

Cite this

Putnam, M. C., Boettcher, S. W., Kelzenberg, M. D., Turner-Evans, D. B., Spurgeon, J. M., Warren, E. L., ... Atwater, H. A. (2010). Si microwire-array solar cells. Energy and Environmental Science, 3(8), 1037-1041. https://doi.org/10.1039/c0ee00014k

Si microwire-array solar cells. / Putnam, Morgan C.; Boettcher, Shannon W.; Kelzenberg, Michael D.; Turner-Evans, Daniel B.; Spurgeon, Joshua M.; Warren, Emily L.; Briggs, Ryan M.; Lewis, Nathan S; Atwater, Harry A.

In: Energy and Environmental Science, Vol. 3, No. 8, 2010, p. 1037-1041.

Research output: Contribution to journalArticle

Putnam, MC, Boettcher, SW, Kelzenberg, MD, Turner-Evans, DB, Spurgeon, JM, Warren, EL, Briggs, RM, Lewis, NS & Atwater, HA 2010, 'Si microwire-array solar cells', Energy and Environmental Science, vol. 3, no. 8, pp. 1037-1041. https://doi.org/10.1039/c0ee00014k
Putnam MC, Boettcher SW, Kelzenberg MD, Turner-Evans DB, Spurgeon JM, Warren EL et al. Si microwire-array solar cells. Energy and Environmental Science. 2010;3(8):1037-1041. https://doi.org/10.1039/c0ee00014k
Putnam, Morgan C. ; Boettcher, Shannon W. ; Kelzenberg, Michael D. ; Turner-Evans, Daniel B. ; Spurgeon, Joshua M. ; Warren, Emily L. ; Briggs, Ryan M. ; Lewis, Nathan S ; Atwater, Harry A. / Si microwire-array solar cells. In: Energy and Environmental Science. 2010 ; Vol. 3, No. 8. pp. 1037-1041.
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