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Tailoring the Electrical Characteristics of MoS2 FETs through Controllable Surface Charge Transfer Doping Using Selective Inkjet Printing

Authors
Jeong, InhoCho, KyungjuneYun, SeobinShin, JiwonKim, JaeyoungKim, Gyu TaeLee, TakheeChung, Seungjun
Issue Date
26-4월-2022
Publisher
AMER CHEMICAL SOC
Keywords
molybdenum disulfide; chemical doping; surface charge transfer doping; inkjet printing; field-effect transistor
Citation
ACS NANO, v.16, no.4, pp.6215 - 6223
Indexed
SCIE
SCOPUS
Journal Title
ACS NANO
Volume
16
Number
4
Start Page
6215
End Page
6223
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/142832
DOI
10.1021/acsnano.2c00021
ISSN
1936-0851
Abstract
Surface charge transfer doping (SCTD) has been regarded as an effective approach to tailor the electrical characteristics of atomically thin transition metal dichalcogenides (TMDs) in a nondestructive manner due to their twodimensional nature. However, the difficulty of achieving rationally controlled SCTD on TMDs via conventional doping methods, such as solution immersion and dopant vaporization, has impeded the realization of practical optoelectronic and electronic devices. Here, we demonstrate controllable SCTD of molybdenum disulfide (MoS2) field-effect transistors using inkjet-printed benzyl viologen (BV) as an n-type dopant. By adjusting the BV concentration and the areal coverage of inkjet-printed BV dopants, controllable SCTD results in BV-doped MoS2 FETs with elaborately tailored electrical performance. Specifically, the suggested solvent system creates well-defined droplets of BV ink having a volume of similar to 2 pL, which allows the high spatial selectivity of SCTD onto the MoS2 channels by depositing the BV dopant on demand. Our inkjetprinted SCTD method provides a feasible solution for achieving controllable doping to modulate the electrical and optical performances of TMD-based devices.
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공과대학 (전기전자공학부)
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