Multidimensional Anodized Titanium Foam Photoelectrode for Efficient Utilization of Photons in Mesoscopic Solar Cells

Jin Soo Kang, Hyelim Choi, Jin Kim, Hyeji Park, Jae Yup Kim, Jung Woo Choi, Seung-Ho Yu, Kyung Jae Lee, Yun Sik Kang, Sun Ha Park, Yong Hun Cho, Jun Ho Yum, David C. Dunand, Heeman Choe, Yung Eun Sung

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Mesoscopic solar cells based on nanostructured oxide semiconductors are considered as a promising candidates to replace conventional photovoltaics employing costly materials. However, their overall performances are below the sufficient level required for practical usages. Herein, this study proposes an anodized Ti foam (ATF) with multidimensional and hierarchical architecture as a highly efficient photoelectrode for the generation of a large photocurrent. ATF photoelectrodes prepared by electrochemical anodization of freeze-cast Ti foams have three favorable characteristics: (i) large surface area for enhanced light harvesting, (ii) 1D semiconductor structure for facilitated charge collection, and (iii) 3D highly conductive metallic current collector that enables exclusion of transparent conducting oxide substrate. Based on these advantages, when ATF is utilized in dye-sensitized solar cells, short-circuit photocurrent density up to 22.0 mA cm−2 is achieved in the conventional N719 dye-I3 /I redox electrolyte system even with an intrinsically inferior quasi-solid electrolyte.

Original languageEnglish
Article number1701458
JournalSmall
Volume13
Issue number34
DOIs
Publication statusPublished - 2017 Sep 13
Externally publishedYes

Fingerprint

Semiconductors
Titanium
Photons
Oxides
Electrolytes
Foams
Solar cells
Coloring Agents
Photocurrents
Oxidation-Reduction
Light
Solid electrolytes
Short circuit currents
Dyes
Semiconductor materials
Substrates

Keywords

  • anodization
  • metal foams
  • solar cells
  • titanium dioxide

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

Cite this

Kang, J. S., Choi, H., Kim, J., Park, H., Kim, J. Y., Choi, J. W., ... Sung, Y. E. (2017). Multidimensional Anodized Titanium Foam Photoelectrode for Efficient Utilization of Photons in Mesoscopic Solar Cells. Small, 13(34), [1701458]. https://doi.org/10.1002/smll.201701458

Multidimensional Anodized Titanium Foam Photoelectrode for Efficient Utilization of Photons in Mesoscopic Solar Cells. / Kang, Jin Soo; Choi, Hyelim; Kim, Jin; Park, Hyeji; Kim, Jae Yup; Choi, Jung Woo; Yu, Seung-Ho; Lee, Kyung Jae; Kang, Yun Sik; Park, Sun Ha; Cho, Yong Hun; Yum, Jun Ho; Dunand, David C.; Choe, Heeman; Sung, Yung Eun.

In: Small, Vol. 13, No. 34, 1701458, 13.09.2017.

Research output: Contribution to journalArticle

Kang, JS, Choi, H, Kim, J, Park, H, Kim, JY, Choi, JW, Yu, S-H, Lee, KJ, Kang, YS, Park, SH, Cho, YH, Yum, JH, Dunand, DC, Choe, H & Sung, YE 2017, 'Multidimensional Anodized Titanium Foam Photoelectrode for Efficient Utilization of Photons in Mesoscopic Solar Cells', Small, vol. 13, no. 34, 1701458. https://doi.org/10.1002/smll.201701458
Kang, Jin Soo ; Choi, Hyelim ; Kim, Jin ; Park, Hyeji ; Kim, Jae Yup ; Choi, Jung Woo ; Yu, Seung-Ho ; Lee, Kyung Jae ; Kang, Yun Sik ; Park, Sun Ha ; Cho, Yong Hun ; Yum, Jun Ho ; Dunand, David C. ; Choe, Heeman ; Sung, Yung Eun. / Multidimensional Anodized Titanium Foam Photoelectrode for Efficient Utilization of Photons in Mesoscopic Solar Cells. In: Small. 2017 ; Vol. 13, No. 34.
@article{4f3a4006e42349a5aa361c8ec74722a3,
title = "Multidimensional Anodized Titanium Foam Photoelectrode for Efficient Utilization of Photons in Mesoscopic Solar Cells",
abstract = "Mesoscopic solar cells based on nanostructured oxide semiconductors are considered as a promising candidates to replace conventional photovoltaics employing costly materials. However, their overall performances are below the sufficient level required for practical usages. Herein, this study proposes an anodized Ti foam (ATF) with multidimensional and hierarchical architecture as a highly efficient photoelectrode for the generation of a large photocurrent. ATF photoelectrodes prepared by electrochemical anodization of freeze-cast Ti foams have three favorable characteristics: (i) large surface area for enhanced light harvesting, (ii) 1D semiconductor structure for facilitated charge collection, and (iii) 3D highly conductive metallic current collector that enables exclusion of transparent conducting oxide substrate. Based on these advantages, when ATF is utilized in dye-sensitized solar cells, short-circuit photocurrent density up to 22.0 mA cm−2 is achieved in the conventional N719 dye-I3 −/I− redox electrolyte system even with an intrinsically inferior quasi-solid electrolyte.",
keywords = "anodization, metal foams, solar cells, titanium dioxide",
author = "Kang, {Jin Soo} and Hyelim Choi and Jin Kim and Hyeji Park and Kim, {Jae Yup} and Choi, {Jung Woo} and Seung-Ho Yu and Lee, {Kyung Jae} and Kang, {Yun Sik} and Park, {Sun Ha} and Cho, {Yong Hun} and Yum, {Jun Ho} and Dunand, {David C.} and Heeman Choe and Sung, {Yung Eun}",
year = "2017",
month = "9",
day = "13",
doi = "10.1002/smll.201701458",
language = "English",
volume = "13",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",
number = "34",

}

TY - JOUR

T1 - Multidimensional Anodized Titanium Foam Photoelectrode for Efficient Utilization of Photons in Mesoscopic Solar Cells

AU - Kang, Jin Soo

AU - Choi, Hyelim

AU - Kim, Jin

AU - Park, Hyeji

AU - Kim, Jae Yup

AU - Choi, Jung Woo

AU - Yu, Seung-Ho

AU - Lee, Kyung Jae

AU - Kang, Yun Sik

AU - Park, Sun Ha

AU - Cho, Yong Hun

AU - Yum, Jun Ho

AU - Dunand, David C.

AU - Choe, Heeman

AU - Sung, Yung Eun

PY - 2017/9/13

Y1 - 2017/9/13

N2 - Mesoscopic solar cells based on nanostructured oxide semiconductors are considered as a promising candidates to replace conventional photovoltaics employing costly materials. However, their overall performances are below the sufficient level required for practical usages. Herein, this study proposes an anodized Ti foam (ATF) with multidimensional and hierarchical architecture as a highly efficient photoelectrode for the generation of a large photocurrent. ATF photoelectrodes prepared by electrochemical anodization of freeze-cast Ti foams have three favorable characteristics: (i) large surface area for enhanced light harvesting, (ii) 1D semiconductor structure for facilitated charge collection, and (iii) 3D highly conductive metallic current collector that enables exclusion of transparent conducting oxide substrate. Based on these advantages, when ATF is utilized in dye-sensitized solar cells, short-circuit photocurrent density up to 22.0 mA cm−2 is achieved in the conventional N719 dye-I3 −/I− redox electrolyte system even with an intrinsically inferior quasi-solid electrolyte.

AB - Mesoscopic solar cells based on nanostructured oxide semiconductors are considered as a promising candidates to replace conventional photovoltaics employing costly materials. However, their overall performances are below the sufficient level required for practical usages. Herein, this study proposes an anodized Ti foam (ATF) with multidimensional and hierarchical architecture as a highly efficient photoelectrode for the generation of a large photocurrent. ATF photoelectrodes prepared by electrochemical anodization of freeze-cast Ti foams have three favorable characteristics: (i) large surface area for enhanced light harvesting, (ii) 1D semiconductor structure for facilitated charge collection, and (iii) 3D highly conductive metallic current collector that enables exclusion of transparent conducting oxide substrate. Based on these advantages, when ATF is utilized in dye-sensitized solar cells, short-circuit photocurrent density up to 22.0 mA cm−2 is achieved in the conventional N719 dye-I3 −/I− redox electrolyte system even with an intrinsically inferior quasi-solid electrolyte.

KW - anodization

KW - metal foams

KW - solar cells

KW - titanium dioxide

UR - http://www.scopus.com/inward/record.url?scp=85025089438&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85025089438&partnerID=8YFLogxK

U2 - 10.1002/smll.201701458

DO - 10.1002/smll.201701458

M3 - Article

C2 - 28722350

AN - SCOPUS:85025089438

VL - 13

JO - Small

JF - Small

SN - 1613-6810

IS - 34

M1 - 1701458

ER -