A broadband 3D microtubular photodetector based on a single wall carbon nanotube-graphene heterojunction

被引：11
|
作者：
Zhang, Yang [1 ]
Li, Yuning [1 ]
You, Qing [1 ]
Sun, Jingye [1 ]
Li, Ke [1 ]
Hong, Hao [2 ]
Kong, Lingbing [1 ]
Zhu, Mingqiang [1 ]
Deng, Tao [1 ,2 ]
Liu, Zewen [2 ]
机构：
[1] Beijing Jiaotong Univ, Sch Elect & Informat Engn, Beijing 100044, Peoples R China
[2] Tsinghua Univ, Sch Integrated Circuits, Beijing 100084, Peoples R China
来源：
NANOSCALE | 2023年 / 15卷 / 03期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
SILICON QUANTUM DOTS; 2-DIMENSIONAL MATERIALS; HYBRID FILMS; HETEROSTRUCTURES; TRANSPORT; DEVICES;
D O I：
10.1039/d2nr05819g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this paper, a three-dimensional (3D) photodetector based on a single wall carbon nanotube (SWCNT) and graphene heterojunction has been fabricated by a self-rolled-up process. In the designed structure, graphene acted as the conductive channel and SWCNTs absorbed the incident light ranging from the visible to near-infrared bands. Compared to planar (two-dimensional, 2D) devices, 3D microcavities provided a natural resonant cavity to enhance the optical field, which improved the photoresponsivity. This 3D heterojunction photodetector realized a broadband photodetection from 470 to 940 nm with an ultrahigh photoresponsivity of 4.9 x 10(4) A W-1 (@ 590 nm) and 1.9 x 10(4) A W-1 (@ 940 nm), a fast photoresponse speed of 1.6 ms, and an excellent sensitivity of 2.28 x 10(11) Jones. Besides, the fabricated photodetector showed favorable mid-infrared detection with a photoresponsivity of 3.08 A W-1 at 10.6 mu m. Moreover, the photodetector exhibited a promising room-temperature imaging capability. The 3D heterojunction photodetector would provide a feasible pathway to realize graphene-based photodetectors with high performance and could be extended to be integrated with other light absorptive materials.
引用
收藏
页码：1402 / 1411
页数：10
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