{"title":"基于范德华 MoS2/MoTe2 异质双电层的红外线光电探测器","authors":"Bining Sheng, Jiong Yang, Chao Zhang, Maoxiang Jiang, Wentao Ma, Xiaoyi Liu, Kourosh Kalantar-Zadeh, Zefeng Chen, Xiaofeng Li","doi":"10.1002/aelm.202400190","DOIUrl":null,"url":null,"abstract":"Photodetectors based on 2D hetero-bilayers can overcome the bandgap limitations of individual 2D monolayers and operate at relatively long wavelengths. However, ultra-low light absorptions within hetero-bilayers result in extremely weak photoresponsivity. Here, an infrared photodetector based on the MoS<sub>2</sub>/MoTe<sub>2</sub> type-II hetero-bilayer is demonstrated to reach a photoresponsivity of 0.55 A W<sup>−1</sup> at 1550 nm, well beyond energy band cut-offs of monolayer MoS<sub>2</sub> and MoTe<sub>2</sub>, primarily resulted from the photogating effect. Raman and photoluminescence (PL) spectroscopy reveal strong interlayer couplings in the hetero-bilayer, and a broad PL peak around 1550 nm is observed that is ascribed to interlayer transitions of carriers. The photodetector showcases a broadband detection capability from 1100 to 1700 nm, with a peak at 1550 nm corresponding to the interlayer absorption. Electrical characterization of the hetero-bilayer-based field-effect transistor and kelvin probe force microscopy reveal efficient interlayer hole transfer. The highly responsive MoS<sub>2</sub>/MoTe<sub>2</sub> infrared photodetector offers a large photo-gain of ≈10<sup>3</sup> and a time constant of 130 ms. The research illuminates how interlayer transitions affect 2D hetero-bilayer-based photodetectors and advances the utilization of layered semiconductor heterostructures.","PeriodicalId":110,"journal":{"name":"Advanced Electronic Materials","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Infrared Photodetector Based on van der Waals MoS2/MoTe2 Hetero-Bilayer Modulated by Photogating\",\"authors\":\"Bining Sheng, Jiong Yang, Chao Zhang, Maoxiang Jiang, Wentao Ma, Xiaoyi Liu, Kourosh Kalantar-Zadeh, Zefeng Chen, Xiaofeng Li\",\"doi\":\"10.1002/aelm.202400190\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Photodetectors based on 2D hetero-bilayers can overcome the bandgap limitations of individual 2D monolayers and operate at relatively long wavelengths. However, ultra-low light absorptions within hetero-bilayers result in extremely weak photoresponsivity. Here, an infrared photodetector based on the MoS<sub>2</sub>/MoTe<sub>2</sub> type-II hetero-bilayer is demonstrated to reach a photoresponsivity of 0.55 A W<sup>−1</sup> at 1550 nm, well beyond energy band cut-offs of monolayer MoS<sub>2</sub> and MoTe<sub>2</sub>, primarily resulted from the photogating effect. Raman and photoluminescence (PL) spectroscopy reveal strong interlayer couplings in the hetero-bilayer, and a broad PL peak around 1550 nm is observed that is ascribed to interlayer transitions of carriers. The photodetector showcases a broadband detection capability from 1100 to 1700 nm, with a peak at 1550 nm corresponding to the interlayer absorption. Electrical characterization of the hetero-bilayer-based field-effect transistor and kelvin probe force microscopy reveal efficient interlayer hole transfer. The highly responsive MoS<sub>2</sub>/MoTe<sub>2</sub> infrared photodetector offers a large photo-gain of ≈10<sup>3</sup> and a time constant of 130 ms. The research illuminates how interlayer transitions affect 2D hetero-bilayer-based photodetectors and advances the utilization of layered semiconductor heterostructures.\",\"PeriodicalId\":110,\"journal\":{\"name\":\"Advanced Electronic Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2024-07-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Electronic Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1002/aelm.202400190\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Electronic Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/aelm.202400190","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Infrared Photodetector Based on van der Waals MoS2/MoTe2 Hetero-Bilayer Modulated by Photogating
Photodetectors based on 2D hetero-bilayers can overcome the bandgap limitations of individual 2D monolayers and operate at relatively long wavelengths. However, ultra-low light absorptions within hetero-bilayers result in extremely weak photoresponsivity. Here, an infrared photodetector based on the MoS2/MoTe2 type-II hetero-bilayer is demonstrated to reach a photoresponsivity of 0.55 A W−1 at 1550 nm, well beyond energy band cut-offs of monolayer MoS2 and MoTe2, primarily resulted from the photogating effect. Raman and photoluminescence (PL) spectroscopy reveal strong interlayer couplings in the hetero-bilayer, and a broad PL peak around 1550 nm is observed that is ascribed to interlayer transitions of carriers. The photodetector showcases a broadband detection capability from 1100 to 1700 nm, with a peak at 1550 nm corresponding to the interlayer absorption. Electrical characterization of the hetero-bilayer-based field-effect transistor and kelvin probe force microscopy reveal efficient interlayer hole transfer. The highly responsive MoS2/MoTe2 infrared photodetector offers a large photo-gain of ≈103 and a time constant of 130 ms. The research illuminates how interlayer transitions affect 2D hetero-bilayer-based photodetectors and advances the utilization of layered semiconductor heterostructures.
期刊介绍:
Advanced Electronic Materials is an interdisciplinary forum for peer-reviewed, high-quality, high-impact research in the fields of materials science, physics, and engineering of electronic and magnetic materials. It includes research on physics and physical properties of electronic and magnetic materials, spintronics, electronics, device physics and engineering, micro- and nano-electromechanical systems, and organic electronics, in addition to fundamental research.