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

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

Content Provider	MDPI
Author	Varasteanu, Pericle Radoi, Antonio Tutunaru, Oana Ficai, Anton Pascu, Razvan Kusko, Mihaela Mihalache, Iuliana
Copyright Year	2021
Description	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 × $10^{11}$ 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.
Starting Page	2460
e-ISSN	20794991
DOI	10.3390/nano11092460
Journal	Nanomaterials
Issue Number	9
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-09-21
Access Restriction	Open
Subject Keyword	Nanomaterials Quantum Science and Technology Telecommunications Metal Nanowires Nanostructured Silicon Silicon Nanoholes Plasmonic Photodetector
Content Type	Text
Resource Type	Article

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