光探测
光电探测器
材料科学
光电子学
石墨烯
化学气相沉积
电极
平版印刷术
吸收(声学)
电子束光刻
图层(电子)
纳米技术
抵抗
化学
物理化学
复合材料
作者
Rabiaa Elkarous,Afrah Bardaoui,Jérôme Borme,Nabil Sghaier,Pedro Alpuim,Diogo M.F. Santos,Radhouane Chtourou
出处
期刊:Chemosensors
[MDPI AG]
日期:2023-03-08
卷期号:11 (3): 181-181
标识
DOI:10.3390/chemosensors11030181
摘要
This work proposes a high-performance asymmetric gold/graphene/platinum photodetector. The new photodetector, operating without bias, integrates interdigitated 100 nm spaced metallic contacts that induce a built-in potential and a short carrier path, allowing an improvement in the separation and collection of the photocarriers. A chemical vapor deposition graphene layer is transferred onto the interdigitated electrodes elaborated using high-resolution electron-beam lithography. Three devices with different side dimensions (100, 1000, and 3000 µm) are fabricated, and their photoresponsivities are evaluated at different wavelengths. The 100 µm device shows the highest photoresponsivity of 358 A/W at a 400 nm illumination. These promising results confirm the proposed design’s ability to increase the photodetector’s active area, improve light absorption, and achieve high separation and collection of photogenerated carriers. This makes it of great interest for optoelectronic applications.
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