One-step synthesis of Zn-doped MoS2 nanosheets with tunable doping concentration using dopants-loaded seeding promoters for visible-light flexible photodetectors

We demonstrated a methodology for one-step synthesis of Zn-doped molybdenum disulfide (MoS2) using Zn(II)-tetrakis(4-hydroxyphenyl)-porphyrin (Zn(II)THPP) as a dopants-loaded seeding promoter for photodetectors. The concentration of Zn dopants for the formation of Zn-doped MoS2 nanosheets was precio...

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Bibliographic Details
Published in:Journal of alloys and compounds 2020-09, Vol.835, p.155383, Article 155383
Main Authors: Jeon, In Su, Kim, Seong Jun, Song, Wooseok, Myung, Sung, Lim, Jongsun, Lee, Sun Sook, Jung, Ha-Kyun, Hwang, Jinha, An, Ki-Seok
Format: Article
Language:English
Subjects:
Atomic scale structure
Dopants
Doping
Hybrid systems
Molybdenum disulfide
Nanosheets
Nanostructured materials
Photoconductivity and photovoltaics
Photoelectrons
Photometers
Spectrum analysis
Synthesis
Transition metal alloys and compounds
Vapor phases
X ray photoelectron spectroscopy
X-ray fluorescence
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Summary:We demonstrated a methodology for one-step synthesis of Zn-doped molybdenum disulfide (MoS2) using Zn(II)-tetrakis(4-hydroxyphenyl)-porphyrin (Zn(II)THPP) as a dopants-loaded seeding promoter for photodetectors. The concentration of Zn dopants for the formation of Zn-doped MoS2 nanosheets was preciously regulated solely through altering diethylzinc exposure time using a hybrid deposition system combining thermal evaporation and subsequent vapor phase metalation. Comprehensive spectroscopic evaluations for monitoring the doping concentration of Zn atoms into MoS2 nanosheets and exploring the doping effect of Zn atoms on MoS2 nanosheets were implemented using X-ray fluorescence spectroscopy and X-ray photoelectron spectroscopy. We validated the capability of Zn-doped MoS2 nanosheets with customizable doping concentration for nanophotonic devices. Consequently, the substantial enhancement in the photoresponsivitiy extracted from Zn-doped MoS2-based photodetectors with Zn area density of 0.98 μg/cm2, compared with that of pristine MoS2-based photodetectors. •One-step synthesis of Zn-doped MoS2 was conducted by dopant-loaded seeding promoters.•Doping concentration of Zn was regulated by altering diethylzinc exposure time.•The enhancement in the photoresponsivity of Zn-doped MoS2 photodetectors was achieved.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.155383