2020
DOI: 10.1039/d0ta02136a
|View full text |Cite|
|
Sign up to set email alerts
|

Bandgap-adjustment and enhanced surface photovoltage in Y-substituted LaTaIVO2N

Abstract:

Microstructure controlled ammonolysis allowed the synthesis of oxynitrides La1−xYxTaIVO2N (x ≤ 0.3) and YTa(O,N)3 of which the first ones showed a remarkable up-built of photovoltage even in the presence of reduced tantalum (e.g. Ta4+).

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

0
11
0

Year Published

2021
2021
2025
2025

Publication Types

Select...
9

Relationship

1
8

Authors

Journals

citations
Cited by 13 publications
(11 citation statements)
references
References 79 publications
(116 reference statements)
0
11
0
Order By: Relevance
“…The corresponding photovoltage (ΔCPD) is caused by the transfer of photogenerated charge carriers toward or away from the Kelvin probe . This provides information about the majority carrier type, the effective band gap, defects, and the photochemistry of the sample, as detailed in previous studies. , …”
Section: Results and Discussionmentioning
confidence: 94%
“…The corresponding photovoltage (ΔCPD) is caused by the transfer of photogenerated charge carriers toward or away from the Kelvin probe . This provides information about the majority carrier type, the effective band gap, defects, and the photochemistry of the sample, as detailed in previous studies. , …”
Section: Results and Discussionmentioning
confidence: 94%
“…31 Regarding the electronic properties, tuning of the band gap has been achieved in Y-substituted LaTaO 2 N from an orthorhombic strain. 32 From the perspective of photocatalysis, controlling the morphological and structural variations of LaTiO 2 N and CoO x nanoparticles could influence the strain in the structure and hence promote the photocatalytic O 2 evolution. 33 It has also been reported that Au−SrTiO 3 with tensile strain, where the strain is induced by the difference of the thermal expansion coefficient between Au and SrTiO 3 , shows 10.5 times higher photocatalytic activity for water splitting than the unstrained Au−SrTiO 3 .…”
Section: ■ Introductionmentioning
confidence: 99%
“…Furthermore, a ferroelectric response in tensile-strained SrTaO 2 N films is observed due to a change of the anion ordering as a function of the applied strain . Regarding the electronic properties, tuning of the band gap has been achieved in Y-substituted LaTaO 2 N from an orthorhombic strain . From the perspective of photocatalysis, controlling the morphological and structural variations of LaTiO 2 N and CoO x nanoparticles could influence the strain in the structure and hence promote the photocatalytic O 2 evolution .…”
Section: Introductionmentioning
confidence: 99%
“…Magnetism measurements suggest that reduced Ta species such as Ta 4+ are also present in the bulk (Figure S15). These defects appear to be intrinsic and are widely seen in many Ta-based metal oxynitrides subject to high temperature ammonolysis. , These defects often act as deep trapping sites or recombination centers which are detrimental to photocatalytic activity. , A very short diffusion length of photocarriers is expected for LaTaON 2 as these defects are electronically active in capturing photocarriers. , In this regard, PSCs with thin skeletons would be extremely useful in maximizing photocarriers’ migration from bulk to the surface. This is clearly reflected from a large activity difference between LaTaON 2 -P and LaTaON 2 -S for photocatalytic water oxidation into O 2 .…”
Section: Resultsmentioning
confidence: 99%