Giant lateral photovoltaic effect in Ag/porous silicon/Si structure for high-performance near-infrared detection

被引:10
|
作者
Hu, Su [1 ,2 ]
Bao, Peng [1 ,2 ]
Cao, Yuhong [1 ,2 ]
Zhao, Zhuyikang [1 ,2 ]
Chang, Ke [1 ,2 ]
Su, Nan [1 ,2 ]
Jiang, Kang 'an [1 ,2 ]
Zhao, Xinhui [1 ,2 ]
Wang, Hui [1 ,2 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Phys & Astron, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Res Inst Micro Nano Sci & Technol, Key Lab Thin Film & Microfabricat Technol, Minist Educ, Shanghai 200240, Peoples R China
基金
中国国家自然科学基金;
关键词
Lateral photovoltaic effect; Near -infrared region; Light trapping; Local surface plasmon resonance; POROUS SILICON; ULTRAFAST; ORIGIN; POINT;
D O I
10.1016/j.nanoen.2023.109167
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The lateral photovoltaic effect demonstrates versatility across various applications, including photodetectors, imaging, spectroscopy, biosensing, and environmental monitoring. Challenges arise from the low energy of nearinfrared photons, regarded as a bottleneck for high-sensitivity photodetector development in this spectrum, limiting applications like optical fiber communication and image sensors. However, this study achieved a remarkable 720.57 mV/mm sensitivity for the lateral photovoltaic effect in the near-infrared region with a 980 nm laser irradiation on an Ag/Porous Silicon/Si structure. This sensitivity surpasses previous observations several to hundreds of times and even outperforms many other structures in the short-wavelength spectrum, further emphasizing its significance in this field. The use of a unique fluoro-amino electrolysis technique ensures consistent porosity, mitigating the adverse effects of photoluminescence. Combined with surface Ag, it induces local surface plasmon resonance and efficient plasmon coupling, markedly increasing electron density. This highly sensitive structure propels advancements in near-infrared photodetectors and Raman signal enhancement, establishing a robust foundation for potential applications in highly sensitive photodetectors and biological sensors.
引用
收藏
页数:9
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