Ionization and Neutralization Dynamics of CsPbBr3 Perovskite Nanocrystals Revealed by Double-Pump Transient Absorption Spectroscopy

2019 ◽  
Vol 10 (16) ◽  
pp. 4731-4736 ◽  
Author(s):  
Satoshi Nakahara ◽  
Keiichi Ohara ◽  
Hirokazu Tahara ◽  
Go Yumoto ◽  
Tokuhisa Kawawaki ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Perovskite Nanocrystals

scholarly journals Influence of the rate of radiation energy on the charge-carrier kinetics application of all-inorganic CsPbBr3 perovskite nanocrystals

RSC Advances ◽  
2020 ◽  
Vol 10 (57) ◽  
pp. 34651-34657
Author(s):  
Virendra Kumar ◽  
Vandana Nagal ◽  
Rahul Kumar ◽  
Shubhda Srivastava ◽  
Bipin Kumar Gupta ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Radiation Energy ◽  
Transient Absorption Spectroscopy ◽  
Cooling Process ◽  
Perovskite Nanocrystals ◽  
Hot Carrier

A mechanistic framework for hot carrier cooling process in CsPbBr3 PNC is depicted via transient absorption spectroscopy.

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.

Charge-Transfer Dynamics at Ag/Ni-MOF/Cu2O heterostructure in Photoelectrochemical NH3 production

2021 ◽  
Author(s):  
Ying Liu ◽  
Jianmin Lu ◽  
Qianxiao Zhang ◽  
Yajie Bai ◽  
Xuliang Pang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Yield Rate ◽  
Ultrafast Transient Absorption ◽  
Charge Transfer Dynamics ◽  
Ultrafast Transient Absorption Spectroscopy

Decoration of Ag-ultrathin Ni-MOF onside Cu2O was firstly fabricated. The charge-transfer dynamics at heterostructure was in-depth revealed by ultrafast transient absorption spectroscopy. NH3 yield rate (4.63 μg h-1 cm-2) with...

scholarly journals Attosecond x-ray transient absorption spectroscopy in graphene

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Giovanni Cistaro ◽  
Luis Plaja ◽  
Fernando Martín ◽  
Antonio Picón
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
X Ray
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