KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Hybrid structure of PbS QDs and vertically-few-layer MoS2 nanosheets array for broadband photodetector | |
Zhang,Kun1,2; Feng,Shuanglong2 ; Kang,Shuai2; Wu,Yutong1,2; Zhang,Miaomiao2; Wang,Qingshan3; Tao,Zhiyong4; Fan,Yaxian4; Lu,Wenqiang2
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| 2021-01-11 | |
| 摘要 | Abstract A novel three-dimensional (3D) vertically-few-layer MoS2 (V-MoS2) nanosheets- zero-dimensional PbS quantum dots (QDs) hybrid structure based broadband photodetector was fabricated, and its photoelectric performance was investigated in detail. We synthesized the V-MoS2 nanosheets by chemical vapor deposition, using the TiO2 layer as the induced layer, and proposed a possible growth mechanism. The use of the TiO2 induction layer successfully changed the growth direction of MoS2 from parallel to vertical. The prepared V-MoS2 nanosheets have a large specific surface area, abundantly exposed edges and excellent light absorption capacity. The V-MoS2 nanosheets detector was then fabricated and investigated, which exhibits a high sensitivity for 635 nm light, a fast response time and an excellent photoelectric response. The V-MoS2 nanosheets with a height of approximately 1 μm successfully broke the light absorption limit caused by the atomic thickness. Finally, we fabricated the PbS QDs/V-MoS2 nanosheets hybrid detector and demonstrated their potential for high-performance broadband photodetectors. The response wavelength of the hybrid detector extends from the visible band to the near-infrared band. The responsivity of the hybrid detector reaches 1.46 A W?1 under 1450 nm illumination. The combination of 3D MoS2 nanosheets and QDs further improves the performance of MoS2-based photodetector devices. We believe that the proposed zero-dimensional QDs and 3D vertical nanosheets hybrid structure broadband photodetector provides a promising way for the next-generation optoelectronic devices. |
| 关键词 | chemical vapor deposition PbS QDs hybrid nanostructure broadband photodetector vertical MoS2 nanosheets |
| DOI | 10.1088/1361-6528/abd57f |
| 发表期刊 | Nanotechnology
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| ISSN | 0957-4484 |
| 卷号 | 32期号:14 |
| WOS记录号 | IOP:nano_32_14_145602 |
| 语种 | 英语 |
