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Title:Understanding the in-situ transformation of ▫$Cu_xO$▫ interlayers to increase the water splitting efficiency in NiO/n-Si photoanodes
Authors:ID Feng, Chao (Author)
ID Liu, Zhi (Author)
ID Ju, Huanxin (Author)
ID Mavrič, Andraž (Author)
ID Valant, Matjaž (Author)
ID Fu, Jie (Author)
ID Zhang, Beibei (Author)
ID Li, Yanbo (Author)
Files:URL https://www.nature.com/articles/s41467-024-50893-x
 
.pdf s41467-024-50893-x.pdf (2,10 MB)
MD5: 05103C87753A4E5CD0A3D7EB211DD687
 
URL https://www.nature.com/articles/s41467-024-50893-x
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:The buried interface tens of nanometers beneath the solid-liquid junction is crucial for photocarrier extraction, influencing the overall efficiency of photoelectrochemical devices. Precise characterization of the interfacial properties is essential for device optimization but remains challenging. Here, we directly probe the in situ transformation of a CuxO interlayer at the NiO/n-Si interface by hard X-ray photoelectron spectroscopy. It is found that Cu(I) in the CuxO interlayer gradually transforms to Cu(II) with air exposure, forming an energetically more favorable interface and improving photoanode’s efficiency. Based on this finding, a reactive e-beam evaporation process is developed for the direct deposition of a CuO interlayer, achieving a half-cell solar-to-hydrogen efficiency of 4.56% for the optimized NiO/CuO/n-Si heterojunction photoanode. Our results highlight the importance of precision characterization of interfacial properties with advanced hard X-ray photoelectron spectroscopy in guiding the design of efficient solar water-splitting devices.
Keywords:photo anode, energy harvesting, nickel oxide, interface
Publication status:Published
Publication version:Version of Record
Publication date:31.07.2024
Year of publishing:2024
Number of pages:str. 1-11
Numbering:Vol. 15, article no. ǂ6436
PID:20.500.12556/RUNG-9206 New window
COBISS.SI-ID:203338755 New window
UDC:53
ISSN on article:2041-1723
DOI:10.1038/s41467-024-50893-x New window
NUK URN:URN:SI:UNG:REP:Y58TCUWX
Publication date in RUNG:01.08.2024
Views:944
Downloads:10
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Record is a part of a journal

Title:Nature communications
Shortened title:Nat. Commun.
Publisher:Nature Publishing Group
ISSN:2041-1723
COBISS.SI-ID:2315876 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Raziskovalni program
Project number:P2-0412
Name:Heterogeni procesi na površinah trdnin za trajnostne tehnologije

Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Raziskovalni projekt
Project number:J2-2498
Name:Redukcija ogljikovega dioksida na katalizatorju z izoliranimi atomi za tvorbo spojin z dodano vrednostjo

Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Raziskovalni projekt
Project number:J2-50058
Name:Sinergijski učinek disperzije žlahtnih kovin in interakcij med kovino in nosilcem v anionsko izmenjevalnih plastovitih kovinskih hidroksidih za učinkovito katalitsko hidrogeniranje CO2

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License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

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