scholarly journals Charge generation mechanism tuned via film morphology in small molecule bulk-heterojunction photovoltaic materials

2020 ◽  
Vol 8 (43) ◽  
pp. 15234-15252
Author(s):  
Sylvia J. Lou ◽  
Stephen Loser ◽  
Kyle A. Luck ◽  
Nanjia Zhou ◽  
Matthew J. Leonardi ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Small Molecule ◽  
Transient Absorption ◽  
Bulk Heterojunction ◽  
Transient Absorption Spectroscopy ◽  
Film Morphology ◽  
Charge Generation ◽  
Ultrafast Optical ◽  
Photovoltaic Materials ◽  
Optical Transient

Exciton evolution with PC61BM loading in small molecule BHJ layers revealed by GIWAXS and ultrafast optical transient absorption spectroscopy.

Transient Absorption Spectroscopy Studies on Polythiophene-Fullerene Bulk Heterojunction Organic Blend Films Sensitized with a Low-Bandgap Polymer

2013 ◽  
Vol 34 (13) ◽  
pp. 1090-1097 ◽  
Author(s):  
Heiko Löslein ◽  
Tayebeh Ameri ◽  
Gebhard J. Matt ◽  
Markus Koppe ◽  
Hans J. Egelhaaf ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Bulk Heterojunction ◽  
Transient Absorption Spectroscopy ◽  
Blend Films ◽  
Low Bandgap ◽  
Spectroscopy Studies

Excited-State Bond Contraction and Charge Migration in a Platinum Dimer Complex Characterized by X-ray and Optical Transient Absorption Spectroscopy

2021 ◽  
Author(s):  
Nicholas P. Weingartz ◽  
Michael W. Mara ◽  
Subhangi Roy ◽  
Jiyun Hong ◽  
Arnab Chakraborty ◽  
...  
Keyword(s):  
Excited State ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Charge Migration ◽  
X Ray ◽  
Optical Transient

Femtosecond Transient Absorption Spectroscopy of Single-Walled Carbon Nanotubes and their Ultrafast Optical Switching Behavior

2007 ◽  
Vol 121-123 ◽  
pp. 905-908 ◽  
Author(s):  
J.P. Yang ◽  
Manfred M. Kappes ◽  
H. Hippler ◽  
Andreas N. Unterreiner
Keyword(s):  
Absorption Spectroscopy ◽  
Optical Switching ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Switching Behavior ◽  
Ultrafast Optical ◽  
Decay Component ◽  
Femtosecond Transient Absorption ◽  
Pump And Probe ◽  
Walled Carbon Nanotubes

Two types of individualized single-walled nanotubes (SWNTs) in aqueous surfactant suspensions have been studied by femtosecond two-color absorption spectroscopy. A careful selection of pump and probe wavelengths allows for the determination of the “intrinsic” lifetimes of the lowest excited states which depend on the diameter of the SWNTs. Furthermore, a fast decay component in the ps to sub-ps regime was also observed and tentatively attributed to bundle relaxation. Likewise, this experimental approach can also assess spectral regions with decays faster than 1 ps, which is of great interest for all-optical switching devices near the optical telecommunication wavelength.

scholarly journals Broadband cavity-enhanced ultrafast spectroscopy

2021 ◽  
Author(s):  
Myles C. Silfies ◽  
Grzegorz Kowzan ◽  
Neomi Lewis ◽  
Thomas K. Allison
Keyword(s):  
Molecular Dynamics ◽  
Optical Spectroscopy ◽  
Absorption Spectroscopy ◽  
Ultrafast Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Ultrafast Optical ◽  
Ultrafast Optical Spectroscopy

Broadband ultrafast optical spectroscopy methods, such as transient absorption spectroscopy and 2D spectroscopy, are widely used to study molecular dynamics. However, these techniques are typically restricted to optically thick samples,...

Structure and excited-state dynamics of dimeric copper(i) photosensitizers investigated by time-resolved X-ray and optical transient absorption spectroscopy

2021 ◽  
Vol 23 (5) ◽  
pp. 3656-3667
Author(s):  
Lucía Velasco ◽  
Leonel Llanos ◽  
Pedro Levín ◽  
Andrés Vega ◽  
Jin Yu ◽  
...  
Keyword(s):  
Excited State ◽  
Optical Absorption ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Optical Absorption Spectroscopy ◽  
Time Resolved ◽  
X Ray ◽  
Solvent Type ◽  
Optical Transient

Three homoleptic Cu(i) dimeric photosensitizers are studied through ultrafast X-ray and optical absorption spectroscopy. The complexes show distinct excited state lifetimes, due to the solvent type and spacers' flexibilities between the Cu centres.

scholarly journals Excited state electron and energy relays in supramolecular dinuclear complexes revealed by ultrafast optical and X-ray transient absorption spectroscopy

2018 ◽  
Vol 9 (4) ◽  
pp. 860-875 ◽  
Author(s):  
Dugan Hayes ◽  
Lars Kohler ◽  
Ryan G. Hadt ◽  
Xiaoyi Zhang ◽  
Cunming Liu ◽  
...  
Keyword(s):  
Excited State ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Dinuclear Complexes ◽  
X Ray ◽  
Ultrafast Optical ◽  
State Electron ◽  
Charge Hopping

Complementary ultrafast techniques provide clear observation of charge hopping between metals in dinuclear complexes.

Formation of Methanofullerene Cation in Bulk Heterojunction Polymer Solar Cells Studied by Transient Absorption Spectroscopy

2008 ◽  
Vol 18 (17) ◽  
pp. 2555-2562 ◽  
Author(s):  
Shunsuke Yamamoto ◽  
Jiamo Guo ◽  
Hideo Ohkita ◽  
Shinzaburo Ito
Keyword(s):  
Solar Cells ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Transient Absorption Spectroscopy

Charge recombination dynamics in a polymer/fullerene bulk heterojunction studied by transient absorption spectroscopy

2003 ◽  
Vol 137 (1-3) ◽  
pp. 1505-1506 ◽  
Author(s):  
A.F. Nogueira ◽  
I. Montanari ◽  
J. Nelson ◽  
C. Winder ◽  
N.S. Sariciftci ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Bulk Heterojunction ◽  
Charge Recombination ◽  
Transient Absorption Spectroscopy ◽  
Recombination Dynamics

Interplay between microstructure, defect states, and mobile charge generation in transition metal dichalcogenide heterojunctions

Nanoscale ◽  
2021 ◽  
Author(s):  
Dana B. Sulas-Kern ◽  
Hanyu Zhang ◽  
Zhaodong Li ◽  
Jeffrey L. Blackburn
Keyword(s):  
Transition Metal ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Transition Metal Dichalcogenide ◽  
Mobile Charge ◽  
Defect States ◽  
Charge Generation

We use microwave photoconductivity and transient absorption spectroscopy to show higher yields of mobile carriers and longer lifetimes in nanotube/MoS2 heterojunctions when monolayer MoS2 contains a small fraction of defect-rich multilayer islands.

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