Optimizing the performance of ZnO/Au/MgZnO/SiO2 sandwich structured UV photodetectors by surface plasmons in Ag nanoparticles

The dual-wavelength UV photodetector (PD) with sandwich structure of ZnO/Au/MgZnO/SiO 2 was fabricated and investigated with an emphasis on the effects of the Ag nanoparticles localized surface plasmons (LSPs). The results demonstrated that the modification in Ag nanoparticle (NP) position played a...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2020-04, Vol.126 (4), Article 310
Main Authors: Li, Meng, Zhao, Man, Jiang, Dayong, Li, Qian, Shan, Chuncai, Zhou, Xuan, Duan, Yuhan, Wang, Nan, Sun, Jiamei
Format: Article
Language:English
Subjects:
Applied physics
Characterization and Evaluation of Materials
Condensed Matter Physics
Machines
Manufacturing
Materials science
Nanoparticles
Nanotechnology
Optical and Electronic Materials
Photometers
Physics
Physics and Astronomy
Plasmons
Processes
Sandwich structures
Silicon dioxide
Silver
Surfaces and Interfaces
Thin Films
Zinc oxide
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Summary:The dual-wavelength UV photodetector (PD) with sandwich structure of ZnO/Au/MgZnO/SiO 2 was fabricated and investigated with an emphasis on the effects of the Ag nanoparticles localized surface plasmons (LSPs). The results demonstrated that the modification in Ag nanoparticle (NP) position played a remarkable influence on the performance of dual-wavelength UV photodetectors. In comparison with decorating Ag NPs on the surface of the PDs, embedding Ag NPs between the MgZnO and ZnO films could improve two peak responsivities (caused by MgZnO and ZnO layers) significantly. By calculating the responsivities enhancement ratio of double layers (MgZnO and ZnO), the results indicated that the enhancement ratio of MgZnO is higher than that of ZnO. This was ascribed to LSPs of energy match with MgZnO which was superior to ZnO. This work described a creative method for increasing the performance of dual-wavelength UV PDs.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-020-03486-6