ZnO UV Photodetectors Modified by Ag Nanoparticles Using All-Inkjet-Printing

Abstract

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 × 10 10 Jones at 0.715 mW incident light power, which is higher than that of 5.72 × 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 is I pc ∝ P 2.34 , which means the photocurrent is highly sensitive to the change of incident light power.

Recent Trends in Graphene/Polymer Nanocomposites for Sensing Devices: Synthesis and Applications in Environmental and Human Health Monitoring

“…The nanomaterials involved in the engineering of UV sensors typically include structures such as zinc oxide and silver nanoparticles [163][164][165]. In this field, graphene properties can be exploited to improve carrier transport and UV absorption and therefore the photoresponse of the sensors.…”

Natural Boron and 10B-Enriched Hexagonal Boron Nitride for High-Sensitivity Self-Biased Metal–Semiconductor–Metal Neutron Detectors

“…Even more interestingly, despite the same metal nature of the two contacts, both I – V curves exhibit a slightly nonsymmetric behavior versus the applied voltage as shown in the inset of Figure 2 . This asymmetric behavior most likely originates from a different filled carrier trap density at the interface of the h-BN with the two contacts, 27 leading to different SBH at the two contacts.…”

“…A set of grown 2.5 μm natural and 10 B-enriched h-BN film samples were then used for fabrication of MSM detectors and were tested under thermal neutron flux. interface of the h-BN with the two contacts, 27 leading to different SBH at the two contacts.…”

Enhancing the Ultraviolet Photocurrent and Response Speed of Zinc Oxide Nanoflowers using Surface Plasmons of Gold Nanoparticles and a Graphene Membrane

“…As the effective area of the devices was 0.02 cm 2 and the power density used in the test was 48 μW cm −2 , the corresponding illumination power could be calculated as 0.96 μW. The equation for calculating the responsivities of the devices is as follows [ 58 ] where R is the responsivity, I photo and I dark stand for the photocurrent and dark current, respectively, and P in is the power of the incident UV light. According to Equation (), the responsivities of the devices could be calculated as 2.98, 38.3, 129, and 1650 A W −1 , respectively.…”