Single-Crystal Diamond Nanowires Embedded with Platinum Nanoparticles for High-Temperature Solar-Blind Photodetector DOI Creative Commons
Jiaqi Lu, Xinglai Zhang,

Shun Feng

et al.

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: April 16, 2025

Abstract Diamond, an ultrawide-bandgap semiconductor material, is promising for solar-blind ultraviolet photodetectors in extreme environments. However, when exposed to high-temperature conditions, diamond photodetector surfaces are unavoidably terminated with oxygen, leading low photoresponsivity. To address this limitation, single-crystalline nanowires (DNWs) embedded platinum (Pt) nanoparticles were developed using Pt film deposition followed by chemical vapor (CVD) homoepitaxial growth. During the CVD, (approximately 20 nm diameter) undergo dewetting and become uniformly within DNWs. Photodetectors fabricated these nanoparticles-embedded DNWs achieve a responsivity of 68.5 A W −1 under 220 illumination at room temperature, representing improvement approximately 2000 times compared oxygen-terminated bulk devices. Notably, further increases reaching exceptional value 3098.7 275 °C. This outstanding performance attributed synergistic effects one-dimensional nanowire structure, deep-level defects, localized surface plasmon resonance induced nanoparticles, Schottky junctions Pt/diamond interface, which enhance optical absorption, carrier generation, separation efficiency. These results highlight significant potential advanced deep detection harsh environments, including aerospace, industrial monitoring, other applications.

Language: Английский

Single-Crystal Diamond Nanowires Embedded with Platinum Nanoparticles for High-Temperature Solar-Blind Photodetector DOI Creative Commons
Jiaqi Lu, Xinglai Zhang,

Shun Feng

et al.

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: April 16, 2025

Abstract Diamond, an ultrawide-bandgap semiconductor material, is promising for solar-blind ultraviolet photodetectors in extreme environments. However, when exposed to high-temperature conditions, diamond photodetector surfaces are unavoidably terminated with oxygen, leading low photoresponsivity. To address this limitation, single-crystalline nanowires (DNWs) embedded platinum (Pt) nanoparticles were developed using Pt film deposition followed by chemical vapor (CVD) homoepitaxial growth. During the CVD, (approximately 20 nm diameter) undergo dewetting and become uniformly within DNWs. Photodetectors fabricated these nanoparticles-embedded DNWs achieve a responsivity of 68.5 A W −1 under 220 illumination at room temperature, representing improvement approximately 2000 times compared oxygen-terminated bulk devices. Notably, further increases reaching exceptional value 3098.7 275 °C. This outstanding performance attributed synergistic effects one-dimensional nanowire structure, deep-level defects, localized surface plasmon resonance induced nanoparticles, Schottky junctions Pt/diamond interface, which enhance optical absorption, carrier generation, separation efficiency. These results highlight significant potential advanced deep detection harsh environments, including aerospace, industrial monitoring, other applications.

Language: Английский

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