Journal
NANOSCALE RESEARCH LETTERS
Volume 15, Issue 1, Pages -Publisher
SPRINGER
DOI: 10.1186/s11671-020-03405-x
Keywords
Inkjet printing; Ag nanoparticles; ZnO photodetector; Passivation; Surface plasmons
Funding
- National Natural Science Foundation of China [61974144, 51975384, 51872187]
- Key Research and Development Program of Guangdong Province [2020B010174003, 2019B010138002]
- Shenzhen University-National Taipei University of Technology Joint Research Program [2020009]
- Open Project of State Key Laboratory of Functional Materials for Informatics
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To further improve the performance of all-inkjet-printing ZnO UV photodetector and maintain the advantages of inkjet printing technology, the inkjet printing Ag nanoparticles (NPs) were deposited on the inkjet printing ZnO UV photodetector for the first time. The inkjet printing Ag NPs can passivate the surface defects of ZnO and work as surface plasmons from the characterization of photoluminescence (PL), X-ray photoelectron spectroscopy (XPS), and finite difference time domain method (FDTD) simulation. The normalized detectivity (D*) of the Ag NP-modified detector reaches to 1.45 x 10(10)Jones at 0.715 mW incident light power, which is higher than that of 5.72 x 10(9)Jones of the bare ZnO photodetector. The power-law relationship between the photocurrent and the incident light power of the Ag NP-modified ZnO detector isI(pc) proportional to P-2.34, which means the photocurrent is highly sensitive to the change of incident light power.
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