Journal article
Modulated interlayer charge transfer dynamics in a monolayer TMD/metal junction
Nanoscale, Vol.11(2), pp.418-425
01/2019
PMID: 30543239
Metrics
9 Record Views
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Abstract
The performance of optoelectronic devices based on monolayer transition-metal dichalcogenide (mTMD) semiconductors is significantly affected by the contact at the mTMD-metal interface, which is dependent on interlayer interactions and coupling. Here, we report a systematic optical method to investigate the interlayer charge transfer and coupling in a mTMD-metal heterojunction. Giant photoluminescence (PL) quenching was observed in a monolayer MoS2/Pd (1L MoS2/Pd) junction which is mainly due to the efficient interlayer charge transfer between Pd and MoS2. 1L MoS2/Pd also exhibits an increase in the PL quenching factor (η) as the temperature decreases, due to a reduction of the interlayer spacing. Annealing experiments were also performed which supported interlayer charge transfer as the main mechanism for the increase of η. Moreover, a monolayer MoS2/Au (1L MoS2/Au) junction was fabricated for engineering the interlayer charge transfer. Interestingly, a narrowing effect of the full width at half maximum (FWHM) was encountered as the junctions changed from 1L MoS2/SiO2 → 1L MoS2/Au → 1L MoS2/Pd, possibly originating from a change of the doping level induced weakening of exciton-carrier scattering. Our results deepen the understanding of metal-semiconductor junctions for further exploring fundamental phenomena and enabling high-performance devices using mTMD-metal junctions.
Details
- Title
- Modulated interlayer charge transfer dynamics in a monolayer TMD/metal junction
- Creators
- Linglong Zhang - Nanjing UniversityHan Yan - Australian National UniversityXueqian Sun - Australian National UniversityMiheng Dong - Australian National UniversityTanju Yildirim - Australian National UniversityBowen Wang - Australian National UniversityBo Wen - Australian National UniversityGuru Prakash Neupane - Australian National UniversityAnkur Sharma - Australian National UniversityYi Zhu - Australian National UniversityJian Zhang - Australian National UniversityKun Liang - Australian National UniversityBoqing Liu - Australian National UniversityHieu T Nguyen - Australian National UniversityDaniel Macdonald - Australian National UniversityYuerui Lu - Australian National University
- Publication Details
- Nanoscale, Vol.11(2), pp.418-425
- Publisher
- Royal Society of Chemistry
- Identifiers
- 991013160127302368
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article