Plasmon-Enhanced Photoresponse of Self-Powered Si Nanoholes Photodetector by Metal Nanowires

Abstract

In this work, we report the development of self-powered photodetectors that integrate silicon nanoholes (SiNHs) and four different types of metal nanowires (AgNWs, AuNWs, NiNWs, PtNWs) applied on the SiNHs’ surface using the solution processing method. The effectiveness of the proposed architectures is evidenced through extensive experimental and simulation analysis. The AgNWs/SiNHs device showed the highest photo-to-dark current ratio of 2.1 × 10−4, responsivity of 30 mA/W and detectivity of 2 × 1011 Jones along with the lowest noise equivalent power (NEP) parameter of 2.4 × 10−12 WHz−1/2 in the blue light region. Compared to the bare SiNHs device, the AuNWs/SiNHs device had significantly enhanced responsivity up to 15 mA/W, especially in the red and near-infrared spectral region. Intensity-modulated photovoltage spectroscopy (IMVS) measurements revealed that the AgNWs/SiNHs device generated the longest charge carrier lifetime at 470 nm, whereas the AuNWs/SiNHs showed the slowest recombination rate at 627 nm. Furthermore, numerical simulation confirmed the local field enhancement effects at the MeNWs and SiNHs interface. The study demonstrates a cost-efficient and scalable strategy to combine the superior light harvesting properties of SiNHs with the plasmonic absorption of metallic nanowires (MeNWs) towards enhanced sensitivity and spectral-selective photodetection induced by the local surface plasmon resonance effects.

Comparative Antimicrobial Activity of Silver Nanoparticles Obtained by Wet Chemical Reduction and Solvothermal Methods

“…The pandemic actual situation brought silver nanoparticles to the attention of researchers with special characteristics regarding the antibacterial and antiviral protection [ 13 , 14 , 15 , 16 ]. Noble metal nanoparticles are characterized by a strong plasmon resonance absorbance peaks in the UV-VIS region given by the localized surface plasmon resonance (LSPR) or surface-enhanced Raman scattering (SERS) [ 17 ]. Thus, the aspect of obtained nanoparticles, in solution, by chemical methods have various colors depending on the reaction conditions [ 8 , 13 , 18 , 19 , 20 , 21 ].…”

Synthesis and Deposition of Silver Nanowires on Porous Silicon as an Ultraviolet Light Photodetector

“…The AgNWs/P-Si obtained a high detectivity of 2.89 1012 Jones at a 1 V bias voltage, as shown in Table 1 , which is considered to be a good result relative to the other studies [ 25 , 26 , 27 , 28 ]. Our research indicates that the UV photodetector performance of AgNWs/porous-Si is substantially better than that of other nanostructures and films thanks to their large surface area relative to their volume, which can absorb a high amount of incident light and generate more free electrons than bare Si.…”

“…Even though 1-D nanostructured material photodetectors have received an extensive design and performance improvement, work on developing photodetectors is still ongoing, and researchers are making unremitting efforts for this purpose [ 24 ]. Many AgNW films for photodetector applications have been fabricated [ 25 , 26 , 27 , 28 ]. These AgNW hybrids have demonstrated a variety of intriguing phenomena, such as a distinctive charge separation and their surface plasmonic properties.…”

Self-Powered Photodetector Based on a Ag Nanoparticle-Decorated Gd2O3 Nanorod

“…A value of θ = ∼1.2 was obtained, which according to Rose’s theory, indicates that the photoresponse is primarily proportional to the photogenerated carriers with low defect states or trapping centers. Other researchers have also obtained similar results with a slope of ∼1.22 and associated this exponent value with dynamic plasmonic effects Figure b shows the photosensitivity at 0 V for various light intensities.…”

“…Other researchers have also obtained similar results with a slope of ∼1.22 and associated this exponent value with dynamic plasmonic effects. 32 Figure 8b shows the photosensitivity at 0 V for various light intensities. The photosensitivity at 0.86 mW/cm 2 was found to be ∼93, which was enhanced to ∼306 with a light intensity of 2.59 mW/cm 2 .…”