Silicon microwire arrays for solar energy-conversion applications

Emily L. Warren, Harry A. Atwater, Nathan S Lewis

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Highly structured silicon microwire (Si MW) arrays have been synthesized and characterized as absorbers for solar energy-conversion systems. These materials are of great interest for applications in solar energy conversion, including solar electricity and solar fuels production, due to their unique materials properties, form factors, ease of fabrication, and device-processing attributes. The Si MW array geometry allows for efficient collection of photogenerated carriers from impure materials that have short minority-carrier diffusion lengths while simultaneously allowing for high optical absorption and high external quantum yields for charge-carrier collection. In addition, Si MW arrays exhibit unique mesoscale optical behavior and can be removed from the growth substrate to provide flexible, processable arrays of Si microwires ordered in a variety of organic polymers and ionomers. The unique photon-management properties of Si MW arrays, combined with their high internal surface area and controlled morphology for catalyst placement and support, allow for the use of earth-abundant electrocatalysts to produce an integrated, functional photoelectrode. These materials therefore also provide an opportunity to explore the 3-dimensional photoelectrochemical behavior of fuel-forming microstructured electrodes.

Original languageEnglish
Pages (from-to)747-759
Number of pages13
JournalJournal of Physical Chemistry C
Volume118
Issue number2
DOIs
Publication statusPublished - Jan 16 2014

Fingerprint

solar energy conversion
Silicon
Energy conversion
Solar energy
silicon
fuel production
Organic polymers
Ionomers
Electrocatalysts
Quantum yield
Charge carriers
Catalyst supports
Light absorption
electrocatalysts
Materials properties
diffusion length
minority carriers
electricity
Photons
Electricity

ASJC Scopus subject areas

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

Cite this

Silicon microwire arrays for solar energy-conversion applications. / Warren, Emily L.; Atwater, Harry A.; Lewis, Nathan S.

In: Journal of Physical Chemistry C, Vol. 118, No. 2, 16.01.2014, p. 747-759.

Research output: Contribution to journalArticle

Warren, Emily L. ; Atwater, Harry A. ; Lewis, Nathan S. / Silicon microwire arrays for solar energy-conversion applications. In: Journal of Physical Chemistry C. 2014 ; Vol. 118, No. 2. pp. 747-759.
@article{6db6898e13f44a75a4f621fdc688a579,
title = "Silicon microwire arrays for solar energy-conversion applications",
abstract = "Highly structured silicon microwire (Si MW) arrays have been synthesized and characterized as absorbers for solar energy-conversion systems. These materials are of great interest for applications in solar energy conversion, including solar electricity and solar fuels production, due to their unique materials properties, form factors, ease of fabrication, and device-processing attributes. The Si MW array geometry allows for efficient collection of photogenerated carriers from impure materials that have short minority-carrier diffusion lengths while simultaneously allowing for high optical absorption and high external quantum yields for charge-carrier collection. In addition, Si MW arrays exhibit unique mesoscale optical behavior and can be removed from the growth substrate to provide flexible, processable arrays of Si microwires ordered in a variety of organic polymers and ionomers. The unique photon-management properties of Si MW arrays, combined with their high internal surface area and controlled morphology for catalyst placement and support, allow for the use of earth-abundant electrocatalysts to produce an integrated, functional photoelectrode. These materials therefore also provide an opportunity to explore the 3-dimensional photoelectrochemical behavior of fuel-forming microstructured electrodes.",
author = "Warren, {Emily L.} and Atwater, {Harry A.} and Lewis, {Nathan S}",
year = "2014",
month = "1",
day = "16",
doi = "10.1021/jp406280x",
language = "English",
volume = "118",
pages = "747--759",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "2",

}

TY - JOUR

T1 - Silicon microwire arrays for solar energy-conversion applications

AU - Warren, Emily L.

AU - Atwater, Harry A.

AU - Lewis, Nathan S

PY - 2014/1/16

Y1 - 2014/1/16

N2 - Highly structured silicon microwire (Si MW) arrays have been synthesized and characterized as absorbers for solar energy-conversion systems. These materials are of great interest for applications in solar energy conversion, including solar electricity and solar fuels production, due to their unique materials properties, form factors, ease of fabrication, and device-processing attributes. The Si MW array geometry allows for efficient collection of photogenerated carriers from impure materials that have short minority-carrier diffusion lengths while simultaneously allowing for high optical absorption and high external quantum yields for charge-carrier collection. In addition, Si MW arrays exhibit unique mesoscale optical behavior and can be removed from the growth substrate to provide flexible, processable arrays of Si microwires ordered in a variety of organic polymers and ionomers. The unique photon-management properties of Si MW arrays, combined with their high internal surface area and controlled morphology for catalyst placement and support, allow for the use of earth-abundant electrocatalysts to produce an integrated, functional photoelectrode. These materials therefore also provide an opportunity to explore the 3-dimensional photoelectrochemical behavior of fuel-forming microstructured electrodes.

AB - Highly structured silicon microwire (Si MW) arrays have been synthesized and characterized as absorbers for solar energy-conversion systems. These materials are of great interest for applications in solar energy conversion, including solar electricity and solar fuels production, due to their unique materials properties, form factors, ease of fabrication, and device-processing attributes. The Si MW array geometry allows for efficient collection of photogenerated carriers from impure materials that have short minority-carrier diffusion lengths while simultaneously allowing for high optical absorption and high external quantum yields for charge-carrier collection. In addition, Si MW arrays exhibit unique mesoscale optical behavior and can be removed from the growth substrate to provide flexible, processable arrays of Si microwires ordered in a variety of organic polymers and ionomers. The unique photon-management properties of Si MW arrays, combined with their high internal surface area and controlled morphology for catalyst placement and support, allow for the use of earth-abundant electrocatalysts to produce an integrated, functional photoelectrode. These materials therefore also provide an opportunity to explore the 3-dimensional photoelectrochemical behavior of fuel-forming microstructured electrodes.

UR - http://www.scopus.com/inward/record.url?scp=84892734875&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892734875&partnerID=8YFLogxK

U2 - 10.1021/jp406280x

DO - 10.1021/jp406280x

M3 - Article

AN - SCOPUS:84892734875

VL - 118

SP - 747

EP - 759

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 2

ER -