Details
| Original language | English |
|---|---|
| Article number | 075014 |
| Journal | Semiconductor Science and Technology |
| Volume | 33 |
| Issue number | 7 |
| Publication status | Published - 11 Jun 2018 |
Abstract
Photo-induced current through nanocomposite heterojunction structures consisting of a TiO2 coating activated with embedded gold nanoparticles on top of Si, SiO2, and columnar structured SiO2 is studied. The highest photo-activity in the visible part of the spectrum is found in the composite containing pillar-like silicon dioxide nanostructures. Experimental results were qualitatively explained on the basis of Franz-Keldysh effect taking into account the effects of electrical inhomogeneities appearing at charged nanoparticles. It is established that processes at the interface between silicon and noble metal nanoparticles play an important role in charge carrier photo-generation which opens a new opportunity to tune the photo-response of a nanocomposite via changing heterostructure topology.
Keywords
- Gold nanoparticles, Heterojunction, Photo-generation
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Electrical and Electronic Engineering
- Materials Science(all)
- Materials Chemistry
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In: Semiconductor Science and Technology, Vol. 33, No. 7, 075014, 11.06.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The mechanism of charge carrier generation at the TiO2—n-Si heterojunction activated by gold nanoparticles
AU - Mishin, Maxim V.
AU - Vorobyev, Alexander A.
AU - Kondrateva, Anastasia S.
AU - Koroleva, Ekaterina Y.
AU - Karaseov, Platon A.
AU - Bespalova, Polina G.
AU - Shakhmin, Alexander L.
AU - Glukhovskoy, Anatoly V.
AU - Wurz, Marc Christopher
AU - Filimonov, Alexey V.
N1 - Funding information: This work was performed under the government order of the Ministry of Education and Science of RF project # 11.5861.2017. M C Wurz and A Filimonov would like to thank the DAAD Grant ‘Scientific Partnership with St. Petersburg State Polytechnic University and Leibniz Uni-versität Hannover’. This work was performed under the government order of the Ministry of Education and Science of RF project # 11.5861.2017. M C Wurz and A Filimonov would like to thank the DAAD Grant ‘Scientific Partnership with St. Petersburg State Polytechnic University and Leibniz Universität Hannover’.
PY - 2018/6/11
Y1 - 2018/6/11
N2 - Photo-induced current through nanocomposite heterojunction structures consisting of a TiO2 coating activated with embedded gold nanoparticles on top of Si, SiO2, and columnar structured SiO2 is studied. The highest photo-activity in the visible part of the spectrum is found in the composite containing pillar-like silicon dioxide nanostructures. Experimental results were qualitatively explained on the basis of Franz-Keldysh effect taking into account the effects of electrical inhomogeneities appearing at charged nanoparticles. It is established that processes at the interface between silicon and noble metal nanoparticles play an important role in charge carrier photo-generation which opens a new opportunity to tune the photo-response of a nanocomposite via changing heterostructure topology.
AB - Photo-induced current through nanocomposite heterojunction structures consisting of a TiO2 coating activated with embedded gold nanoparticles on top of Si, SiO2, and columnar structured SiO2 is studied. The highest photo-activity in the visible part of the spectrum is found in the composite containing pillar-like silicon dioxide nanostructures. Experimental results were qualitatively explained on the basis of Franz-Keldysh effect taking into account the effects of electrical inhomogeneities appearing at charged nanoparticles. It is established that processes at the interface between silicon and noble metal nanoparticles play an important role in charge carrier photo-generation which opens a new opportunity to tune the photo-response of a nanocomposite via changing heterostructure topology.
KW - Gold nanoparticles
KW - Heterojunction
KW - Photo-generation
UR - http://www.scopus.com/inward/record.url?scp=85048250555&partnerID=8YFLogxK
U2 - 10.1088/1361-6641/aac4f3
DO - 10.1088/1361-6641/aac4f3
M3 - Article
AN - SCOPUS:85048250555
VL - 33
JO - Semiconductor Science and Technology
JF - Semiconductor Science and Technology
SN - 0268-1242
IS - 7
M1 - 075014
ER -