期刊
SENSORS
卷 22, 期 24, 页码 -出版社
MDPI
DOI: 10.3390/s22249687
关键词
MoS2; graphene; interlayer; contact engineering; large area
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2021R1F1A1059833]
- Starting growth Technological R&D Program - Ministry of SMEs and Startups (MSS, Korea) [S3194304]
- Korea Technology & Information Promotion Agency for SMEs (TIPA) [S3194304] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2021R1F1A1059833] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study improves the performance of optoelectronic devices by inserting a graphene interlayer between MoS2 films and gold contacts. By using graphene/gold contacts, outstanding electrical properties and responsivity are achieved. These findings are of great significance for constructing large-area photonic sensor arrays.
Two-dimensional (2D) molybdenum disulfide (MoS2) is a promising material for constructing high-performance visible photosensor arrays because of its high mobility and scale-up process. These distinct properties enable the construction of practical optoelectrical sensor arrays. However, contact engineering for MoS2 films is not still optimized. In this work, we inserted a graphene interlayer between the MoS2 films and Au contacts (graphene/Au) via the wet-transfer method to boost the device performance. Using graphene/Au contacts, outstanding electrical properties, namely field-effect mobility of 12.06 cm(2)/V center dot s, on/off current ratio of 1.0 x 10(7), and responsivity of 610 A/W under illumination at 640 nm, were achieved. These favorable results were from the Fermi-level depinning effect induced by the graphene interlayer. Our results may help to construct large-area photonic sensor arrays based on 2D materials.
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