Photoluminescence from Chemically Exfoliated MoS<sub>2</sub>

Abstract

A two-dimensional crystal of molybdenum disulfide (MoS2) monolayer is a photoluminescent direct gap semiconductor in striking contrast to its bulk counterpart. Exfoliation of bulk MoS2 via Li intercalation is an attractive route to large-scale synthesis of monolayer crystals. However, this method results in loss of pristine semiconducting properties of MoS2 due to structural changes that occur during Li intercalation. Here, we report structural and electronic properties of chemically exfoliated MoS2. The metastable metallic phase that emerges from Li intercalation was found to dominate the properties of as-exfoliated material, but mild annealing leads to gradual restoration of the semiconducting phase. Above an annealing temperature of 300 °C, chemically exfoliated MoS2 exhibit prominent band gap photoluminescence, similar to mechanically exfoliated monolayers, indicating that their semiconducting properties are largely restored.

Keywords

PhotoluminescenceMonolayerIntercalation (chemistry)Molybdenum disulfideMaterials scienceAnnealing (glass)Exfoliation jointMetastabilityBand gapSemiconductorNanotechnologyChemical engineeringCrystallographyInorganic chemistryOptoelectronicsGrapheneChemistryComposite materialOrganic chemistry

Affiliated Institutions

Related Publications

Semiconductor Clusters, Nanocrystals, and Quantum Dots

A. Paul Alivisatos

Current research into semiconductor clusters is focused on the properties of quantum dots—fragments of semiconductor consisting of hundreds to many thousands of atoms—with the b...

1996 Science 11266 citations

Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies

C. B. Murray , Cherie R. Kagan , Moungi G. Bawendi

▪ Abstract Solution phase syntheses and size-selective separation methods to prepare semiconductor and metal nanocrystals, tunable in size from ∼1 to 20 nm and monodisperse to ≤...

2000 Annual Review of Materials Science 4292 citations

Exciton diffusion length in narrow bandgap polymers

Oleksandr V. Mikhnenko , Hamed Azimi , Markus C. Scharber +3 more

We developed a new method to accurately extract the singlet exciton diffusion length in organic semiconductors by blending them with a low concentration of methanofullerene[6,6]...

2012 Energy & Environmental Science 222 citations

Chain Length Dependence and Sensing Capabilities of the Localized Surface Plasmon Resonance of Silver Nanoparticles Chemically Modified with Alkanethiol Self-Assembled Monolayers

Michelle Duval Malinsky , K. Lance Kelly , George C. Schatz +1 more

In this paper, we explore the optical properties of Ag nanoparticles chemically modified with alkanethiol self-assembled monolayers (SAMs) by measuring the localized surface pla...

2001 Journal of the American Chemical Society 1057 citations

The Electronic Structure of Semiconductor Nanocrystals

Al. L. Éfros , M. Rosen

▪ Abstract We review the rapid progress made in our understanding of the crystal properties of semiconductors and nanocrystals focussing on theoretical results obtained within t...

2000 Annual Review of Materials Science 916 citations

Publication Info

Year: 2011
Type: article
Volume: 11
Issue: 12
Pages: 5111-5116
Citations: 3756
Access: Closed

External Links

View on DOI.org

Social Impact

Altmetric

Photoluminescence from Chemically Exfoliated MoS<sub>2</sub>

PlumX Metrics

Social media, news, blog, policy document mentions

Citation Metrics

3756

OpenAlex

Cite This

APA Style

                            
                                
                                    Goki Eda, 
                                
                                    Hisato Yamaguchi, 
                                
                                    Damien Voiry
                                
                                et al.
                            
                            (2011). 
                            Photoluminescence from Chemically Exfoliated MoS<sub>2</sub>. 
                            Nano Letters
                            , 11
                            (12)
                            , 5111-5116.
                            https://doi.org/10.1021/nl201874w
                        

Identifiers

DOI: 10.1021/nl201874w