Variable work function of semiconducting thin-film oxide electrodes: a case study of SnO2 and TiO2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00566615" target="_blank" >RIV/61388955:_____/23:00566615 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/23:10454101

Výsledek na webu

<a href="https://hdl.handle.net/11104/0337933" target="_blank" >https://hdl.handle.net/11104/0337933</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10008-022-05353-1" target="_blank" >10.1007/s10008-022-05353-1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Variable work function of semiconducting thin-film oxide electrodes: a case study of SnO2 and TiO2

Popis výsledku v původním jazyce

By atomic layer deposition, we prepared TiO2 thin films, which do not crack upon thermal treatment at 450-500C. The calcination changes the film's work function by tens of meV, as evidenced by electrochemical impedance (Mott-Schottky) and Kelvin probe analyses. In contrast, the work function of ALD-SnO2 is enhanced by hundreds of meV after this heat treatment. The work function of calcined ALD-SnO2 films is by ca. 0.3-0.4 eV larger than that of the cassiterite single-crystal electrode. The as-prepared ALD-SnO2 film exhibits significant anodic photocurrent at potentials, when the calcined film is photoelectrochemically inactive. The ALD growth of SnO2 on the Au(111) substrate occurs preferentially at the Au grain boundaries. In spite of its non-conformal morphology, the Au-supported SnO2 film still blocks perfectly the anodic oxidation of ferrocyanide. Electrochemical doping of ALD-SnO2 by lithium causes a decrease of the work functions by 0.1-0.2 eV in a broad range of film thicknesses.

Název v anglickém jazyce

Variable work function of semiconducting thin-film oxide electrodes: a case study of SnO2 and TiO2

Popis výsledku anglicky

By atomic layer deposition, we prepared TiO2 thin films, which do not crack upon thermal treatment at 450-500C. The calcination changes the film's work function by tens of meV, as evidenced by electrochemical impedance (Mott-Schottky) and Kelvin probe analyses. In contrast, the work function of ALD-SnO2 is enhanced by hundreds of meV after this heat treatment. The work function of calcined ALD-SnO2 films is by ca. 0.3-0.4 eV larger than that of the cassiterite single-crystal electrode. The as-prepared ALD-SnO2 film exhibits significant anodic photocurrent at potentials, when the calcined film is photoelectrochemically inactive. The ALD growth of SnO2 on the Au(111) substrate occurs preferentially at the Au grain boundaries. In spite of its non-conformal morphology, the Au-supported SnO2 film still blocks perfectly the anodic oxidation of ferrocyanide. Electrochemical doping of ALD-SnO2 by lithium causes a decrease of the work functions by 0.1-0.2 eV in a broad range of film thicknesses.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/GA22-24138S" target="_blank" >GA22-24138S: Materiálové inženýrství okraje vodivostního pásu v oxidických polovodičích</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Solid State Electrochemistry

ISSN

1432-8488

e-ISSN

1433-0768

Svazek periodika

27

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

1935-1943

Kód UT WoS článku

000901731500002

EID výsledku v databázi Scopus

2-s2.0-85144470243