Macroporous silicon as a model for silicon wire array solar cells

James R. Maiolo, Harry A. Atwater, Nathan S Lewis

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Macroporous silicon samples have been investigated in photoelectrochemical cells, and their behavior has been compared to that of conventional, planar, Si/liquid junctions. The liquid electrolyte junction provided a conformal contact to the macroporous Si and allowed assessment of the trade-offs between increased surface area and decreased carrier collection distances in such systems relative to the behavior of planar semiconductor/liquid photoelectrochemical junctions. The electrolyte contained the dimethylferrocene/dimethylferrocenium redox system in methanol because this system has been shown previously to produce bulk recombination-diffusion-limited contacts at planar Si(100) electrodes under 100 mW cm-2 of simulated air mass 1.5 illumination. Introduction of a network of ∼2-3 μm diameter, ∼80 μm long pores into the Si was found to slightly reduce the short-circuit photocurrent density and the open-circuit voltage of the system, but energy-conversion efficiencies in excess of 10% were nevertheless obtained from such samples. This system therefore validates the concept of using interpenetrating networks to produce efficient solar energy conversion devices in systems that do not have long carrier collection distances.

Original languageEnglish
Pages (from-to)6194-6201
Number of pages8
JournalJournal of Physical Chemistry C
Volume112
Issue number15
DOIs
Publication statusPublished - Apr 17 2008

Fingerprint

Solar cell arrays
Silicon
solar cells
wire
Wire
Energy conversion
Electrolytes
Liquids
silicon
liquids
electrolytes
Photoelectrochemical cells
solar energy conversion
Interpenetrating polymer networks
energy conversion efficiency
air masses
short circuits
Open circuit voltage
open circuit voltage
Photocurrents

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Macroporous silicon as a model for silicon wire array solar cells. / Maiolo, James R.; Atwater, Harry A.; Lewis, Nathan S.

In: Journal of Physical Chemistry C, Vol. 112, No. 15, 17.04.2008, p. 6194-6201.

Research output: Contribution to journalArticle

Maiolo, James R. ; Atwater, Harry A. ; Lewis, Nathan S. / Macroporous silicon as a model for silicon wire array solar cells. In: Journal of Physical Chemistry C. 2008 ; Vol. 112, No. 15. pp. 6194-6201.
@article{544ca0e3ea1440dca19965ae840971fa,
title = "Macroporous silicon as a model for silicon wire array solar cells",
abstract = "Macroporous silicon samples have been investigated in photoelectrochemical cells, and their behavior has been compared to that of conventional, planar, Si/liquid junctions. The liquid electrolyte junction provided a conformal contact to the macroporous Si and allowed assessment of the trade-offs between increased surface area and decreased carrier collection distances in such systems relative to the behavior of planar semiconductor/liquid photoelectrochemical junctions. The electrolyte contained the dimethylferrocene/dimethylferrocenium redox system in methanol because this system has been shown previously to produce bulk recombination-diffusion-limited contacts at planar Si(100) electrodes under 100 mW cm-2 of simulated air mass 1.5 illumination. Introduction of a network of ∼2-3 μm diameter, ∼80 μm long pores into the Si was found to slightly reduce the short-circuit photocurrent density and the open-circuit voltage of the system, but energy-conversion efficiencies in excess of 10{\%} were nevertheless obtained from such samples. This system therefore validates the concept of using interpenetrating networks to produce efficient solar energy conversion devices in systems that do not have long carrier collection distances.",
author = "Maiolo, {James R.} and Atwater, {Harry A.} and Lewis, {Nathan S}",
year = "2008",
month = "4",
day = "17",
doi = "10.1021/jp711340b",
language = "English",
volume = "112",
pages = "6194--6201",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "15",

}

TY - JOUR

T1 - Macroporous silicon as a model for silicon wire array solar cells

AU - Maiolo, James R.

AU - Atwater, Harry A.

AU - Lewis, Nathan S

PY - 2008/4/17

Y1 - 2008/4/17

N2 - Macroporous silicon samples have been investigated in photoelectrochemical cells, and their behavior has been compared to that of conventional, planar, Si/liquid junctions. The liquid electrolyte junction provided a conformal contact to the macroporous Si and allowed assessment of the trade-offs between increased surface area and decreased carrier collection distances in such systems relative to the behavior of planar semiconductor/liquid photoelectrochemical junctions. The electrolyte contained the dimethylferrocene/dimethylferrocenium redox system in methanol because this system has been shown previously to produce bulk recombination-diffusion-limited contacts at planar Si(100) electrodes under 100 mW cm-2 of simulated air mass 1.5 illumination. Introduction of a network of ∼2-3 μm diameter, ∼80 μm long pores into the Si was found to slightly reduce the short-circuit photocurrent density and the open-circuit voltage of the system, but energy-conversion efficiencies in excess of 10% were nevertheless obtained from such samples. This system therefore validates the concept of using interpenetrating networks to produce efficient solar energy conversion devices in systems that do not have long carrier collection distances.

AB - Macroporous silicon samples have been investigated in photoelectrochemical cells, and their behavior has been compared to that of conventional, planar, Si/liquid junctions. The liquid electrolyte junction provided a conformal contact to the macroporous Si and allowed assessment of the trade-offs between increased surface area and decreased carrier collection distances in such systems relative to the behavior of planar semiconductor/liquid photoelectrochemical junctions. The electrolyte contained the dimethylferrocene/dimethylferrocenium redox system in methanol because this system has been shown previously to produce bulk recombination-diffusion-limited contacts at planar Si(100) electrodes under 100 mW cm-2 of simulated air mass 1.5 illumination. Introduction of a network of ∼2-3 μm diameter, ∼80 μm long pores into the Si was found to slightly reduce the short-circuit photocurrent density and the open-circuit voltage of the system, but energy-conversion efficiencies in excess of 10% were nevertheless obtained from such samples. This system therefore validates the concept of using interpenetrating networks to produce efficient solar energy conversion devices in systems that do not have long carrier collection distances.

UR - http://www.scopus.com/inward/record.url?scp=43749119663&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=43749119663&partnerID=8YFLogxK

U2 - 10.1021/jp711340b

DO - 10.1021/jp711340b

M3 - Article

AN - SCOPUS:43749119663

VL - 112

SP - 6194

EP - 6201

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 15

ER -