Nonlinear photoluminescence in monolayer WS2 : parabolic emission and excitation fluence-dependent recombination dynamics

Nanoscale
Xiaopeng FanAnlian Pan

Abstract

Recombination dynamics during photoluminescence (PL) in two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDs) are complicated and can be easily affected by the surroundings because of their atomically thin structures. Herein, we studied the excitation power and temperature dependence of the recombination dynamics on the chemical vapor deposition-grown monolayer WS2via a combination of Raman, PL, and time-resolved PL spectroscopies. We found a red shift and parabolic intensity increase in the PL emission of the monolayer WS2 with the increasing excitation power and the decay time constants corresponding to the recombination of trions and excitons from transient PL dynamics. We attributed the abovementioned nonlinear changes in the PL peak positions and intensities to the combination of increasing carrier interaction and band structure renormalization rather than to the thermal effect from a laser. Furthermore, the excitation power-dependent Raman measurements support our conclusion. These findings and understanding will provide important information for the development of TMD-based optoelectronics and photonics.

References

Jan 15, 2011·Physical Review Letters·Kin Fai MakTony F Heinz
Jun 19, 2012·Nature Nanotechnology·Kin Fai MakTony F Heinz
Jun 19, 2012·Nature Nanotechnology·Hualing ZengXiaodong Cui
Nov 8, 2012·Nature Nanotechnology·Qing Hua WangMichael S Strano
Dec 1, 2012·Nano Letters·Humberto R GutiérrezMauricio Terrones
Dec 4, 2012·Nature Materials·Kin Fai MakJie Shan
Feb 14, 2013·Nature Communications·Jason S RossXiaodong Xu
May 7, 2013·Nature Materials·Arend M van der ZandeJames C Hone
Dec 10, 2013·Physical Review Letters·Diana Y QiuSteven G Louie
Dec 25, 2013·ACS Applied Materials & Interfaces·Thripuranthaka M, Dattatray J Late
Feb 26, 2014·Journal of the American Chemical Society·Honglai LiXiangfeng Duan
Mar 4, 2014·Physical Review Letters·D LagardeB Urbaszek
Mar 13, 2014·Nature Nanotechnology·Andreas PospischilThomas Mueller
Mar 13, 2014·Nature Nanotechnology·Jason S RossXiaodong Xu
Mar 29, 2014·Nano Letters·Sanghyun JoAlberto F Morpurgo
Jul 26, 2014·Physical Review Letters·Keliang HeJie Shan
Jul 30, 2014·ACS Nano·Dmitry OvchinnikovAndras Kis
Sep 30, 2014·Nature Nanotechnology·Xidong DuanXiangfeng Duan
Mar 19, 2015·Scientific Reports·Bairen ZhuXiaodong Cui
Apr 1, 2015·Nanoscale·Long Yuan, Libai Huang
Apr 15, 2015·Journal of the American Chemical Society·Honglai LiXiangfeng Duan
May 6, 2015·Nature Nanotechnology·Chitraleema ChakrabortyA Nick Vamivakas
Jul 26, 2015·Physical Review Letters·Xiaoxia WangXiangfeng Duan
Aug 21, 2015·Nature Materials·Xavier Marie, Bernhard Urbaszek

❮ Previous
Next ❯

Citations

Apr 16, 2019·Nanoscale·Dominik AndrzejewskiGerd Bacher
Aug 18, 2018·Optics Express·Alex KrasnokAndrea Alú
Jun 28, 2019·The Journal of Physical Chemistry Letters·Peng FanAnlian Pan
Mar 7, 2020·Nano Letters·Xiaopeng FanRitesh Agarwal
Oct 31, 2020·The Journal of Physical Chemistry Letters·Shu-Wen ZhengHong-Bo Sun
May 16, 2018·Nano Letters·Xiaopeng FanAnlian Pan
Jul 13, 2019·Journal of the American Chemical Society·Biyuan ZhengAnlian Pan
Nov 17, 2021·ACS Applied Materials & Interfaces·Shuai GuoRuibin Liu

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.