Boosting Visible Light Harvesting in p-Type Ternary Oxides for Solar-to-Hydrogen Conversion Using Inverse Opal Structure

Yunjung Oh, Wooseok Yang, Jeiwan Tan, Hyungsoo Lee, Jaemin Park, Jooho Moon

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

P-type semiconductors based on ternary oxides have attracted wide interest owing to their earth-crust abundance and favorable optoelectronic properties. Among the p-type ternary oxides, delafossite-phase CuFeO 2 has received considerable attention because it has the potential to fully harness visible light (<800 nm) owing to its narrow bandgap (1.4–1.6 eV). Despite the favorable optoelectronic properties predicted by theoretical studies, CuFeO 2 photocathodes have low quantum efficiency under visible light near the bandgap edge, which is a major bottleneck for efficient solar-to-hydrogen conversion. Herein, a novel method is presented for boosting visible-light harvesting in the CuFeO 2 photocathode by employing an inverse opal structure as a periodic macrostructure. The periodic macroporous structure allows exceptional near-bandgap photon harvesting, particularly within the range of 600–700 nm, owing to the enhanced light absorption due to multiple scattering together with the short diffusion distance for minority carriers toward the electrolyte. After surface modification with a low-cost double hydroxide electrocatalyst, our CuFeO 2 -based photocathode exhibits a record-breaking photocurrent density of 5.2 mA cm −2 at −0.1 V with respect to the reversible hydrogen electrode for water reduction among p-type ternary oxide-based photocathodes.

Original languageEnglish
Article number1900194
JournalAdvanced Functional Materials
Volume29
Issue number17
DOIs
Publication statusPublished - 2019 Apr 25

Fingerprint

Photocathodes
photocathodes
Oxides
Hydrogen
Energy gap
oxides
hydrogen
Optoelectronic devices
harnesses
Earth crust
electrocatalysts
Electrocatalysts
Multiple scattering
Periodic structures
electromagnetic absorption
minority carriers
Photocurrents
Quantum efficiency
Light absorption
Electrolytes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry

Cite this

@article{53df5f072b514b7f9277d07e5d1496df,
title = "Boosting Visible Light Harvesting in p-Type Ternary Oxides for Solar-to-Hydrogen Conversion Using Inverse Opal Structure",
abstract = "P-type semiconductors based on ternary oxides have attracted wide interest owing to their earth-crust abundance and favorable optoelectronic properties. Among the p-type ternary oxides, delafossite-phase CuFeO 2 has received considerable attention because it has the potential to fully harness visible light (<800 nm) owing to its narrow bandgap (1.4–1.6 eV). Despite the favorable optoelectronic properties predicted by theoretical studies, CuFeO 2 photocathodes have low quantum efficiency under visible light near the bandgap edge, which is a major bottleneck for efficient solar-to-hydrogen conversion. Herein, a novel method is presented for boosting visible-light harvesting in the CuFeO 2 photocathode by employing an inverse opal structure as a periodic macrostructure. The periodic macroporous structure allows exceptional near-bandgap photon harvesting, particularly within the range of 600–700 nm, owing to the enhanced light absorption due to multiple scattering together with the short diffusion distance for minority carriers toward the electrolyte. After surface modification with a low-cost double hydroxide electrocatalyst, our CuFeO 2 -based photocathode exhibits a record-breaking photocurrent density of 5.2 mA cm −2 at −0.1 V with respect to the reversible hydrogen electrode for water reduction among p-type ternary oxide-based photocathodes.",
author = "Yunjung Oh and Wooseok Yang and Jeiwan Tan and Hyungsoo Lee and Jaemin Park and Jooho Moon",
year = "2019",
month = "4",
day = "25",
doi = "10.1002/adfm.201900194",
language = "English",
volume = "29",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "17",

}

Boosting Visible Light Harvesting in p-Type Ternary Oxides for Solar-to-Hydrogen Conversion Using Inverse Opal Structure. / Oh, Yunjung; Yang, Wooseok; Tan, Jeiwan; Lee, Hyungsoo; Park, Jaemin; Moon, Jooho.

In: Advanced Functional Materials, Vol. 29, No. 17, 1900194, 25.04.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Boosting Visible Light Harvesting in p-Type Ternary Oxides for Solar-to-Hydrogen Conversion Using Inverse Opal Structure

AU - Oh, Yunjung

AU - Yang, Wooseok

AU - Tan, Jeiwan

AU - Lee, Hyungsoo

AU - Park, Jaemin

AU - Moon, Jooho

PY - 2019/4/25

Y1 - 2019/4/25

N2 - P-type semiconductors based on ternary oxides have attracted wide interest owing to their earth-crust abundance and favorable optoelectronic properties. Among the p-type ternary oxides, delafossite-phase CuFeO 2 has received considerable attention because it has the potential to fully harness visible light (<800 nm) owing to its narrow bandgap (1.4–1.6 eV). Despite the favorable optoelectronic properties predicted by theoretical studies, CuFeO 2 photocathodes have low quantum efficiency under visible light near the bandgap edge, which is a major bottleneck for efficient solar-to-hydrogen conversion. Herein, a novel method is presented for boosting visible-light harvesting in the CuFeO 2 photocathode by employing an inverse opal structure as a periodic macrostructure. The periodic macroporous structure allows exceptional near-bandgap photon harvesting, particularly within the range of 600–700 nm, owing to the enhanced light absorption due to multiple scattering together with the short diffusion distance for minority carriers toward the electrolyte. After surface modification with a low-cost double hydroxide electrocatalyst, our CuFeO 2 -based photocathode exhibits a record-breaking photocurrent density of 5.2 mA cm −2 at −0.1 V with respect to the reversible hydrogen electrode for water reduction among p-type ternary oxide-based photocathodes.

AB - P-type semiconductors based on ternary oxides have attracted wide interest owing to their earth-crust abundance and favorable optoelectronic properties. Among the p-type ternary oxides, delafossite-phase CuFeO 2 has received considerable attention because it has the potential to fully harness visible light (<800 nm) owing to its narrow bandgap (1.4–1.6 eV). Despite the favorable optoelectronic properties predicted by theoretical studies, CuFeO 2 photocathodes have low quantum efficiency under visible light near the bandgap edge, which is a major bottleneck for efficient solar-to-hydrogen conversion. Herein, a novel method is presented for boosting visible-light harvesting in the CuFeO 2 photocathode by employing an inverse opal structure as a periodic macrostructure. The periodic macroporous structure allows exceptional near-bandgap photon harvesting, particularly within the range of 600–700 nm, owing to the enhanced light absorption due to multiple scattering together with the short diffusion distance for minority carriers toward the electrolyte. After surface modification with a low-cost double hydroxide electrocatalyst, our CuFeO 2 -based photocathode exhibits a record-breaking photocurrent density of 5.2 mA cm −2 at −0.1 V with respect to the reversible hydrogen electrode for water reduction among p-type ternary oxide-based photocathodes.

UR - http://www.scopus.com/inward/record.url?scp=85061040915&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85061040915&partnerID=8YFLogxK

U2 - 10.1002/adfm.201900194

DO - 10.1002/adfm.201900194

M3 - Article

AN - SCOPUS:85061040915

VL - 29

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 17

M1 - 1900194

ER -