Conformal Carbon Nitride Coating as an Efficient Hole Extraction Layer for ZnO Nanowires-Based Photoelectrochemical Cells

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

23 Scopus Citations
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Author(s)

  • Špela Hajduk
  • Sean P. Berglund
  • Matejka Podlogar
  • Goran Dražić
  • Zorica C. Orel
  • Menny Shalom

Detail(s)

Original languageEnglish
Article number1700924
Journal / PublicationAdvanced Materials Interfaces
Volume4
Issue number24
Publication statusPublished - 22 Dec 2017
Externally publishedYes

Abstract

Charge transfer at the semiconductor–electrolyte junction is one of the main challenges for further improvement of photoelectrochemical (PEC) water splitting cells due to the poor surface catalytic properties of most semiconductors for the water oxidation reaction. Here it is shown, for the first time, that a conformal and thin carbon nitride (CN) layer can efficiently extract holes from ZnO nanowires (NWs), leading to a great enhancement of both PEC performance and stability in alkaline solution. The conformal CN coating is acquired by using a new synthetic method which involves the deposition of small supramolecular assemblies on ZnO-NWs as a seeding layer for the CN growth. Detailed PEC characterization reveals that the CN facilitates the hole transfer from the ZnO-NWs to the electrolyte and acts as a protective shell, resulting in 3.5 times higher current densities and high external quantum efficiencies at 1.23 V versus RHE compared to the pristine ZnO-NWs. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Research Area(s)

  • carbon nitride, conformal coating, photoelectrochemical cell, water oxidation, zinc oxide nanowires

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Citation Format(s)

Conformal Carbon Nitride Coating as an Efficient Hole Extraction Layer for ZnO Nanowires-Based Photoelectrochemical Cells. / Hajduk, Špela; Berglund, Sean P.; Podlogar, Matejka et al.
In: Advanced Materials Interfaces, Vol. 4, No. 24, 1700924, 22.12.2017.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review