Semiconductor quantum dot-sensitized rainbow photocathode for effective photoelectrochemical hydrogen generation
Abstract
We discuss the fabrication of CdSe quantum dot (QD)-sensitized photocathodes on NiO-coated indium tin oxide (ITO) electrodes and their H 2-generating ability upon light irradiation. A well-established spin-coating approach was used to deposit CdSe QD stock solution onto the surface of NiO/ITO electrodes, thereby leading to the construction of various CdSe QD-sensitized photocathodes. The present report includes the construction of rainbow photocathodes by spin-coating different-sized QDs in a sequentially layered manner, thereby creating an energetically favorable gradient for charge separation. The resulting rainbow photocathodes with forward energetic gradient for charge separation and subsequent electron transfer to a solution-based hydrogen-evolving catalyst (HEC) exhibit good light-harvesting ability and enhanced photoresponses compared with the reverse rainbow photocathodes under white LED light illumination. Under minimally optimized conditions, a photocurrent density of as high as 115 μA•cm –2and a Faradaic efficiency of 99.5% are achieved, which is among the most capable QD-based photocathode water-splitting systems.
- Publication Date:
- Research Org.:
- Univ. of Rochester, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; National Science Foundation (NSF)
- OSTI Identifier:
- 1540267
- Grant/Contract Number:
- SC0002106; FG02-09ER16121; CBET-1437656
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Proceedings of the National Academy of Sciences of the United States of America
- Additional Journal Information:
- Journal Volume: 114; Journal Issue: 43; Journal ID: ISSN 0027-8424
- Publisher:
- National Academy of Sciences, Washington, DC (United States)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- photochemical; hydrogen; photocathode; semiconductor; quantum dot
Citation Formats
Lv, Hongjin, Wang, Congcong, Li, Guocan, Burke, Rebeckah, Krauss, Todd D., Gao, Yongli, and Eisenberg, Richard. Semiconductor quantum dot-sensitized rainbow photocathode for effective photoelectrochemical hydrogen generation. United States: N. p., 2017.
Web. doi:10.1073/pnas.1712325114.
Lv, Hongjin, Wang, Congcong, Li, Guocan, Burke, Rebeckah, Krauss, Todd D., Gao, Yongli, & Eisenberg, Richard. Semiconductor quantum dot-sensitized rainbow photocathode for effective photoelectrochemical hydrogen generation. United States. doi:10.1073/pnas.1712325114.
Lv, Hongjin, Wang, Congcong, Li, Guocan, Burke, Rebeckah, Krauss, Todd D., Gao, Yongli, and Eisenberg, Richard. Mon .
"Semiconductor quantum dot-sensitized rainbow photocathode for effective photoelectrochemical hydrogen generation". United States. doi:10.1073/pnas.1712325114. https://www.osti.gov/servlets/purl/1540267.
@article{osti_1540267,
title = {Semiconductor quantum dot-sensitized rainbow photocathode for effective photoelectrochemical hydrogen generation},
author = {Lv, Hongjin and Wang, Congcong and Li, Guocan and Burke, Rebeckah and Krauss, Todd D. and Gao, Yongli and Eisenberg, Richard},
abstractNote = {We discuss the fabrication of CdSe quantum dot (QD)-sensitized photocathodes on NiO-coated indium tin oxide (ITO) electrodes and their H2-generating ability upon light irradiation. A well-established spin-coating approach was used to deposit CdSe QD stock solution onto the surface of NiO/ITO electrodes, thereby leading to the construction of various CdSe QD-sensitized photocathodes. The present report includes the construction of rainbow photocathodes by spin-coating different-sized QDs in a sequentially layered manner, thereby creating an energetically favorable gradient for charge separation. The resulting rainbow photocathodes with forward energetic gradient for charge separation and subsequent electron transfer to a solution-based hydrogen-evolving catalyst (HEC) exhibit good light-harvesting ability and enhanced photoresponses compared with the reverse rainbow photocathodes under white LED light illumination. Under minimally optimized conditions, a photocurrent density of as high as 115 μA•cm–2and a Faradaic efficiency of 99.5% are achieved, which is among the most capable QD-based photocathode water-splitting systems.},
doi = {10.1073/pnas.1712325114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 43,
volume = 114,
place = {United States},
year = {2017},
month = {10}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 9 works
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Quantum-Sized PbS, CdS, Ag2S, Sb2S3, and Bi2S3 Particles as Sensitizers for Various Nanoporous Wide-Bandgap Semiconductors
journal, March 1994
- Vogel, R.; Hoyer, P.; Weller, H.
- The Journal of Physical Chemistry, Vol. 98, Issue 12, p. 3183-3188
Powering the planet: Chemical challenges in solar energy utilization
journal, October 2006
- Lewis, N. S.; Nocera, D. G.
- Proceedings of the National Academy of Sciences, Vol. 103, Issue 43, p. 15729-15735
Solar Water Splitting Cells
journal, November 2010
- Walter, Michael G.; Warren, Emily L.; McKone, James R.
- Chemical Reviews, Vol. 110, Issue 11, p. 6446-6473
Preparation and characterization of Eosin B- and Erythrosin J-sensitized nanostructured NiO thin film photocathodes
journal, November 2005
- Vera, F.; Schrebler, R.; Muñoz, E.
- Thin Solid Films, Vol. 490, Issue 2, p. 182-188
CdSe Quantum Dot Sensitized Solar Cells. Shuttling Electrons Through Stacked Carbon Nanocups
journal, August 2009
- Farrow, Blake; Kamat, Prashant V.
- Journal of the American Chemical Society, Vol. 131, Issue 31, p. 11124-11131