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

Špela Hajduk; Sean P. Berglund; Matejka Podlogar; Goran Dražić; Fatwa F. Abdi; Zorica C. Orel; Menny Shalom

doi:10.1002/admi.201700924

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

Špela Hajduk
, Sean P. Berglund
, Matejka Podlogar
, Goran Dražić
, Fatwa F. Abdi
, Zorica C. Orel
, Menny Shalom^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

32 Citations (Scopus)

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

Original language	English
Article number	1700924
Journal	Advanced Materials Interfaces
Volume	4
Issue number	24
DOIs	https://doi.org/10.1002/admi.201700924
Publication status	Published - 22 Dec 2017
Externally published	Yes

Bibliographical 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].

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

carbon nitride
conformal coating
photoelectrochemical cell
water oxidation
zinc oxide nanowires

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@article{4902502c279243be8a29f03939f6873c,

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

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. {\textcopyright} 2017 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

keywords = "carbon nitride, conformal coating, photoelectrochemical cell, water oxidation, zinc oxide nanowires",

author = "{\v S}pela Hajduk and Berglund, \{Sean P.\} and Matejka Podlogar and Goran Dra{\v z}i{\'c} and Abdi, \{Fatwa F.\} and Orel, \{Zorica C.\} and Menny Shalom",

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language = "English",

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journal = "Advanced Materials Interfaces",

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publisher = "John Wiley \& Sons",

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TY - JOUR

T1 - Conformal Carbon Nitride Coating as an Efficient Hole Extraction Layer for ZnO Nanowires-Based Photoelectrochemical Cells

AU - Hajduk, Špela

AU - Berglund, Sean P.

AU - Podlogar, Matejka

AU - Dražić, Goran

AU - Abdi, Fatwa F.

AU - Orel, Zorica C.

AU - Shalom, Menny

N1 - 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].

PY - 2017/12/22

Y1 - 2017/12/22

N2 - 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

AB - 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

KW - carbon nitride

KW - conformal coating

KW - photoelectrochemical cell

KW - water oxidation

KW - zinc oxide nanowires

UR - https://www.scopus.com/pages/publications/85033221735

UR - https://www.scopus.com/pages/publications/85033221735#tab=impact

U2 - 10.1002/admi.201700924

DO - 10.1002/admi.201700924

M3 - RGC 21 - Publication in refereed journal

SN - 2196-7350

VL - 4

JO - Advanced Materials Interfaces

JF - Advanced Materials Interfaces

IS - 24

M1 - 1700924

ER -

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

Abstract

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Research Keywords

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