Mobility enhancement and highly efficient gating of monolayer MoS2 transistors with polymer electrolyte
By Ming-Wei Lin, Lezhang Liu, Qing Lan, X. Tan, K. Dhindsa, P. Zeng, V. Naik, Mark Ming-Cheng Cheng, Zhixian Zhou. 2012
148 citations recorded by the source corpus.
We report electrical characterization of monolayer molybdenum disulfide (MoS2) devices using a thin layer of polymer electrolyte (PE) consisting of poly(ethylene oxide) (PEO) and lithium perchlorate (LiClO4) as both a contact-barrier reducer and channel mobility booster. We find that bare MoS2 devices (without PE) fabricated on Si/SiO2 have low channel mobility and large contact resistance, both of which severely limit the field-effect mobility of the devices. A thin layer of PEO/LiClO4 deposited on top of the devices not only substantially reduces the contact resistance but also boost the channel mobility, leading up to three-orders-of-magnitude enhancement of the field-effect mobility of the device. When the PE is used as a gate medium, the MoS2 field-effect transistors exhibit excellent device characteristics such as a near ideal subthreshold swing and an on/off ratio of 106 as a result of the strong gate-channel coupling.
Subfields: Biomedical Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/4ae8ae9f98b1d30c5c26c820fd11757a7dbb1e60
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In Biomedical Engineering
In Materials Chemistry
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- Hema C. P. Movva
- Amritesh Rai
- D. Taneja
- Qing Zhang
- R. Ganatra
- Anupam Roy
- Sayema Chowdhury
Citations in the corpus
- Few-layer MoS2: a promising layered semiconductor. (2014, methodology): “119,121 Polymer-gated MoS2 FETs have been also presented.(112,120) Poly(ethylene oxide) used with lithium perchlorate (LiClO4) 112 was found to promote a three-order improvement in the mobility from ∼0.”
- Progress in Contact, Doping and Mobility Engineering of MoS2: An Atomically Thin 2D Semiconductor (2018, background): “Moreover, PE-gated devices showed a near ideal SS (~60 mV/decade at RT, implying high gating efficiency) and high ON/OFF ratios (~106) [199].”