Electrodeposition of Silver Vanadate Films : A Tale of Two Polymorphs
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim..
Two polymorphs of AgVO3 , namely the α- and β- forms, were prepared and their physical, structural, optical, electrochemical, and photoelectrochemical characteristics were compared using a battery of experimental and theoretical tools. A two-step method, previously developed in the our laboratory for the electrodeposition of inorganic semiconductor films, was applied to the electrosynthesis of silver vanadate (AgVO3 ) films on transparent, conducting oxide surfaces. In the first step, silver was cathodically deposited from a non-aqueous bath containing silver nitrate. In the second step, the silver film was anodically stripped in an aqueous medium containing ammonium metavanadate. The anodically generated silver ions at the interface underwent a precipitation reaction with the vanadate species to generate the desired product in situ. Each of these steps were mechanistically corroborated via the use of electrochemical quartz crystal microgravimetry, used in conjunction with voltammetry and coulometry. As-deposited films were crystalline and showed p-type semiconductor behavior. Theoretical insights are provided for the electronic origin of the α→β phase transformation in AgVO3 and the disparate optical band gaps of the two polymorphs. Finally, implications for the application of this material in solar cells are provided.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:20 |
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| Enthalten in: |
Chemphyschem : a European journal of chemical physics and physical chemistry - 20(2019), 20 vom: 16. Okt., Seite 2635-2646 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Vali, Abbas [VerfasserIn] |
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| Links: |
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| Themen: |
Electronic band structures |
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| Anmerkungen: |
Date Completed 24.10.2019 Date Revised 08.01.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/cphc.201900558 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM300213689 |
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| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. | ||
| 520 | |a Two polymorphs of AgVO3 , namely the α- and β- forms, were prepared and their physical, structural, optical, electrochemical, and photoelectrochemical characteristics were compared using a battery of experimental and theoretical tools. A two-step method, previously developed in the our laboratory for the electrodeposition of inorganic semiconductor films, was applied to the electrosynthesis of silver vanadate (AgVO3 ) films on transparent, conducting oxide surfaces. In the first step, silver was cathodically deposited from a non-aqueous bath containing silver nitrate. In the second step, the silver film was anodically stripped in an aqueous medium containing ammonium metavanadate. The anodically generated silver ions at the interface underwent a precipitation reaction with the vanadate species to generate the desired product in situ. Each of these steps were mechanistically corroborated via the use of electrochemical quartz crystal microgravimetry, used in conjunction with voltammetry and coulometry. As-deposited films were crystalline and showed p-type semiconductor behavior. Theoretical insights are provided for the electronic origin of the α→β phase transformation in AgVO3 and the disparate optical band gaps of the two polymorphs. Finally, implications for the application of this material in solar cells are provided | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Research Support, U.S. Gov't, Non-P.H.S. | |
| 650 | 4 | |a electronic band structures | |
| 650 | 4 | |a optical bandgap | |
| 650 | 4 | |a photocatalysis | |
| 650 | 4 | |a semiconductors | |
| 650 | 4 | |a solar energy | |
| 700 | 1 | |a Sarker, Hori P |e verfasserin |4 aut | |
| 700 | 1 | |a Jee, Hyung-Woo |e verfasserin |4 aut | |
| 700 | 1 | |a Kormányos, Attila |e verfasserin |4 aut | |
| 700 | 1 | |a Firouzan, Farinaz |e verfasserin |4 aut | |
| 700 | 1 | |a Myung, Noseung |e verfasserin |4 aut | |
| 700 | 1 | |a Paeng, Ki-Jung |e verfasserin |4 aut | |
| 700 | 1 | |a Huda, Muhammad N |e verfasserin |4 aut | |
| 700 | 1 | |a Janáky, Csaba |e verfasserin |4 aut | |
| 700 | 1 | |a Rajeshwar, Krishnan |e verfasserin |4 aut | |
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