Yttrium-doped hematite photoanodes for solar water splitting: Photoelectrochemical and electronic properties

Tanel Käämbre; Martins Vanags; Rainer Pärna; Vambola Kisand; Reinis Ignatans; Janis Kleperis; Andris Šutka

doi:10.1016/j.ceramint.2018.04.147

Yttrium-doped hematite photoanodes for solar water splitting: Photoelectrochemical and electronic properties

Tanel Käämbre
, Martins Vanags
, Rainer Pärna
, Vambola Kisand
, Reinis Ignatans
, Janis Kleperis
, Andris Šutka^*

^*Corresponding author for this work

University of Latvia

University of Tartu
Riga Technical University
Swiss Federal Institute of Technology Lausanne

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

We investigate yttrium-doped hematite thin-film photoelectrochemical properties and find yttrium incorporation to amply improve the performance as a photoanode for water splitting under visible light. We used the spray pyrolysis method to prepare a set of yttrium doped Fe_2-xY_xO₃ (x = 0, 0.05, 0.10, 0.15, 0.2) thin films (thickness below 500 nm) on glass and transparent conductive oxide coated glass slides. Using a substitutional homovalent (Y³⁺) dopant, the effect on functionality is rationalised as a combined effect on the electronic structure and small polaron mobility from the lattice structure, impurity levels, lattice stability and variance in hybridisation. The photoelectrochemical response measurements indicate highest performance at Fe_1.9Y_0.1O₃ composition.

Original language	English
Pages (from-to)	13218-13225
Number of pages	8
Journal	Ceramics International
Volume	44
Issue number	11
DOIs	https://doi.org/10.1016/j.ceramint.2018.04.147
Publication status	Published - 1 Aug 2018

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Hematite
Mott-Schottky analysis
Photoelectrochemical
Y doping

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10.1016/j.ceramint.2018.04.147

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title = "Yttrium-doped hematite photoanodes for solar water splitting: Photoelectrochemical and electronic properties",

abstract = "We investigate yttrium-doped hematite thin-film photoelectrochemical properties and find yttrium incorporation to amply improve the performance as a photoanode for water splitting under visible light. We used the spray pyrolysis method to prepare a set of yttrium doped Fe2-xYxO3 (x = 0, 0.05, 0.10, 0.15, 0.2) thin films (thickness below 500 nm) on glass and transparent conductive oxide coated glass slides. Using a substitutional homovalent (Y3+) dopant, the effect on functionality is rationalised as a combined effect on the electronic structure and small polaron mobility from the lattice structure, impurity levels, lattice stability and variance in hybridisation. The photoelectrochemical response measurements indicate highest performance at Fe1.9Y0.1O3 composition.",

keywords = "Hematite, Mott-Schottky analysis, Photoelectrochemical, Y doping",

author = "Tanel K{\"a}{\"a}mbre and Martins Vanags and Rainer P{\"a}rna and Vambola Kisand and Reinis Ignatans and Janis Kleperis and Andris {\v S}utka",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd and Techna Group S.r.l.",

year = "2018",

month = aug,

day = "1",

doi = "10.1016/j.ceramint.2018.04.147",

language = "English",

volume = "44",

pages = "13218--13225",

journal = "Ceramics International",

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TY - JOUR

T1 - Yttrium-doped hematite photoanodes for solar water splitting

T2 - Photoelectrochemical and electronic properties

AU - Käämbre, Tanel

AU - Vanags, Martins

AU - Pärna, Rainer

AU - Kisand, Vambola

AU - Ignatans, Reinis

AU - Kleperis, Janis

AU - Šutka, Andris

PY - 2018/8/1

Y1 - 2018/8/1

N2 - We investigate yttrium-doped hematite thin-film photoelectrochemical properties and find yttrium incorporation to amply improve the performance as a photoanode for water splitting under visible light. We used the spray pyrolysis method to prepare a set of yttrium doped Fe2-xYxO3 (x = 0, 0.05, 0.10, 0.15, 0.2) thin films (thickness below 500 nm) on glass and transparent conductive oxide coated glass slides. Using a substitutional homovalent (Y3+) dopant, the effect on functionality is rationalised as a combined effect on the electronic structure and small polaron mobility from the lattice structure, impurity levels, lattice stability and variance in hybridisation. The photoelectrochemical response measurements indicate highest performance at Fe1.9Y0.1O3 composition.

AB - We investigate yttrium-doped hematite thin-film photoelectrochemical properties and find yttrium incorporation to amply improve the performance as a photoanode for water splitting under visible light. We used the spray pyrolysis method to prepare a set of yttrium doped Fe2-xYxO3 (x = 0, 0.05, 0.10, 0.15, 0.2) thin films (thickness below 500 nm) on glass and transparent conductive oxide coated glass slides. Using a substitutional homovalent (Y3+) dopant, the effect on functionality is rationalised as a combined effect on the electronic structure and small polaron mobility from the lattice structure, impurity levels, lattice stability and variance in hybridisation. The photoelectrochemical response measurements indicate highest performance at Fe1.9Y0.1O3 composition.

KW - Hematite

KW - Mott-Schottky analysis

KW - Photoelectrochemical

KW - Y doping

UR - https://www.scopus.com/pages/publications/85045758665

U2 - 10.1016/j.ceramint.2018.04.147

DO - 10.1016/j.ceramint.2018.04.147

M3 - Article

AN - SCOPUS:85045758665

SN - 0272-8842

VL - 44

SP - 13218

EP - 13225

JO - Ceramics International

JF - Ceramics International

IS - 11

ER -

Yttrium-doped hematite photoanodes for solar water splitting: Photoelectrochemical and electronic properties

Abstract

UN SDGs

Keywords

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