IMR OpenIR
Switched photocurrent direction in Au/TiO2 bilayer thin films
Chen, Hongjun1,2; Liu, Gang3; Wang, Lianzhou1,2
Corresponding AuthorWang, Lianzhou(l.wang@uq.edu.au)
2015-06-01
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume5Pages:9
AbstractSwitched photocurrent direction in photoelectrodes is a very interesting phenomenon and has demonstrated their potentials in important applications including photodiodes, phototransistors, light-driven sensors and biosensors. However, the design and mechanism understanding of such photoelectrodes remain challenging to date. Here we report a new phenomenon of sequence-driven the photocurrent direction on a simple bilayer structure of 5 nm thick Au and 10 nm TiO2 under visible-light irradiation. It is found that when Au layer are deposited as the outer layer on TiO2 coated fluorine doped tin oxide (FTO) substrate (designated as FTO/TiO2/Au), anodic photocurrent is obtained due to the band bending formed at the electrode-electrolyte interface. Interestingly, simply swapping the deposition sequence of Au and TiO2 leads to cathodic photocurrent on FTO/Au/TiO2 electrode. Characterization and calculations on the photoelectrode reveals that the photogenerated electrons can be easily trapped in the energy well formed between the band bending and the Schottky contact, which allows electronic tunnelling through the 1.6 nm thick space charge layer, resulting in a unique anodic to cathodic photocurrent conversion. The understanding of this new phenomenon can be important for designing new generation optoelectronic converting devices in a low-cost and facile manner.
Funding OrganizationAustralian Research Council ; University of Queensland
DOI10.1038/srep10852
Indexed BySCI
Language英语
Funding ProjectAustralian Research Council ; University of Queensland
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000355606200001
PublisherNATURE PUBLISHING GROUP
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81080
Corresponding AuthorWang, Lianzhou
Affiliation1.Univ Queensland, Nanomat Ctr, Sch Chem Engn, Brisbane, Qld 4072, Australia
2.Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Chen, Hongjun,Liu, Gang,Wang, Lianzhou. Switched photocurrent direction in Au/TiO2 bilayer thin films[J]. SCIENTIFIC REPORTS,2015,5:9.
APA Chen, Hongjun,Liu, Gang,&Wang, Lianzhou.(2015).Switched photocurrent direction in Au/TiO2 bilayer thin films.SCIENTIFIC REPORTS,5,9.
MLA Chen, Hongjun,et al."Switched photocurrent direction in Au/TiO2 bilayer thin films".SCIENTIFIC REPORTS 5(2015):9.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Chen, Hongjun]'s Articles
[Liu, Gang]'s Articles
[Wang, Lianzhou]'s Articles
Baidu academic
Similar articles in Baidu academic
[Chen, Hongjun]'s Articles
[Liu, Gang]'s Articles
[Wang, Lianzhou]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Chen, Hongjun]'s Articles
[Liu, Gang]'s Articles
[Wang, Lianzhou]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.