Spatially Resolved Photo-Response of a Carbon Nanotube/Si Photodetector

被引：8
作者：
Capista, Daniele [1 ]
Lozzi, Luca [1 ]
Pelella, Aniello [2 ]
Di Bartolomeo, Antonio [2 ]
Giubileo, Filippo [3 ]
Passacantando, Maurizio [1 ,4 ]
机构：
[1] Univ Aquila, Dept Phys & Chem Sci, Via Vetoio, I-67100 Coppito, Laquila, Italy
[2] Univ Salerno, Dept Phys, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
[3] CNR SPIN, Via Giovanni Paolo II, I-84084 Fisciano, Salerno, Italy
[4] CNR SPIN, Via Vetoio, I-67100 Coppito, Laquila, Italy
来源：
NANOMATERIALS | 2023年 / 13卷 / 04期
关键词：
carbon nanotubes; heterostructure; silicon heterostructure; photodetector; photodiode; photoconductivity; quantum efficiency;
D O I：
10.3390/nano13040650
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Photodetectors based on vertical multi-walled carbon nanotube (MWCNT) film-Si heterojunctions are realized by growing MWCNTs on n-type Si substrates with a top surface covered by Si3N4 layers. Spatially resolved photocurrent measurements reveal that higher photo detection is achieved in regions with thinner MWCNT film, where nearly 100% external quantum efficiency is achieved. Hence, we propose a simple method based on the use of scotch tape with which to tune the thickness and density of as-grown MWCNT film and enhance device photo-response.
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页数：8
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