Investigating the dynamics of excitons in monolayer WSe2 before and after organic super acid treatment

Nanoscale ◽  
2018 ◽  
Vol 10 (19) ◽  
pp. 9346-9352 ◽  
Author(s):  
Xin Chen ◽  
Zhuo Wang ◽  
Lei Wang ◽  
Hai-Yu Wang ◽  
Yuan-Yuan Yue ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Acid Treatment ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Exciton Dynamics ◽  
Before And After ◽  
Super Acid

Exciton dynamics of monolayer WSe2 before and after organic super acid treatment investigated by broadband transient absorption spectroscopy.

scholarly journals Exciton dynamics in DNA oligomers studied by broadband deep-UV transient absorption spectroscopy

2019 ◽  
Vol 205 ◽  
pp. 10006
Author(s):  
Benjamin Bauer ◽  
Malte Oppermann ◽  
Majed Chergui
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Base Stacking ◽  
Dna Oligomers ◽  
Exciton Dynamics ◽  
Deep Uv ◽  
Strand Length ◽  
Absorption Measurements

We report broadband transient absorption measurements of adenine strands in the deep-UV (250-370 nm). By varying the strand length we resolve the interplay between inter-base stacking and exciton formation and dynamics in DNA oligomers.

scholarly journals Coupled valence carrier and core-exciton dynamics in WS2 probed by few-femtosecond extreme ultraviolet transient absorption spectroscopy

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Hung-Tzu Chang ◽  
Alexander Guggenmos ◽  
Christopher T. Chen ◽  
Juwon Oh ◽  
Romain Géneaux ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Transient Absorption Spectroscopy ◽  
Exciton Dynamics

Unveiling the dimension-dependence of femtosecond nonlinear optical properties of tellurium nanostructures

2021 ◽  
Author(s):  
Qi Xiao ◽  
Bo Ma ◽  
Xian Fei ◽  
Duan-Wu Liu ◽  
Xin-Ping Zhai ◽  
...  
Keyword(s):  
Optical Properties ◽  
Absorption Spectroscopy ◽  
Nonlinear Optical ◽  
Transient Absorption ◽  
Nonlinear Optical Properties ◽  
Transient Absorption Spectroscopy ◽  
Exciton Dynamics ◽  
Ultrafast Transient Absorption ◽  
First Time ◽  
Ultrafast Transient Absorption Spectroscopy

For the first time, strong dimension-dependent femtosecond nonlinear optical properties were demonstrated in a variety of Te nanostructures. Ultrafast transient absorption spectroscopy revealed the dimension-dependent exciton dynamics.

Spectral shifts upon halide segregation in perovskite nanocrystals observed via transient absorption spectroscopy

MRS Advances ◽  
2020 ◽  
Vol 5 (51) ◽  
pp. 2613-2621
Author(s):  
Michael L. Crawford ◽  
James C. Sadighian ◽  
Yasser Hassan ◽  
Henry J. Snaith ◽  
Cathy Y. Wong
Keyword(s):  
Emission Spectrum ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Visible Region ◽  
Volume Ratio ◽  
Transient Absorption Spectroscopy ◽  
Perovskite Nanocrystals ◽  
Light Emitting Devices ◽  
Before And After ◽  
Halide Perovskite

AbstractLead halide perovskite nanocrystals (NCs) are promising for applications in light emitting devices owing to a strong emission spectrum that is tunable throughout the visible region by altering halide composition. However, in mixed-halide perovskite systems photoinduced migration drives formation of halide-segregated domains, altering the emission spectrum. The mechanism by which this segregation occurs is currently the subject of intense investigation. Processes involving the perovskite surface are expected to be of enhanced prevalence in NCs due to their large surface area to volume ratio. In this work, we use transient absorption spectroscopy to probe the excited-state dynamics of NCs before and after halide segregation. Comparison of global fit spectra of the measured signals suggests the accumulation of iodide at the surface, resulting in a redshifted emission spectrum.

Revealing the interrelation between C- and A-exciton dynamics in monolayer WS2 via transient absorption spectroscopy

2021 ◽  
Vol 119 (5) ◽  
pp. 051106
Author(s):  
Yuanzheng Li ◽  
Xianxin Wu ◽  
Weizhen Liu ◽  
Haiyang Xu ◽  
Xinfeng Liu
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Exciton Dynamics
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