Photoinitiated multi-step charge separation and ultrafast charge transfer induced dissociation in a pyridyl-linked photosensitizer–cobaloxime assembly

2013 ◽  
Vol 6 (6) ◽  
pp. 1917 ◽  
Author(s):  
Brad S. Veldkamp ◽  
Won-Sik Han ◽  
Scott M. Dyar ◽  
Samuel W. Eaton ◽  
Mark A. Ratner ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Separation ◽  
Ultrafast Charge Transfer

scholarly journals Long-lived charge separation following pump-wavelength–dependent ultrafast charge transfer in graphene/WS2 heterostructures

2021 ◽  
Vol 7 (9) ◽  
pp. eabd9061
Author(s):  
Shuai Fu ◽  
Indy du Fossé ◽  
Xiaoyu Jia ◽  
Jingyin Xu ◽  
Xiaoqing Yu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Separation ◽  
Transient Absorption ◽  
Transition Metal Dichalcogenides ◽  
Thermionic Emission ◽  
Great Promise ◽  
Metal Dichalcogenides ◽  
Ultrafast Charge Transfer ◽  
Device Operation ◽  
Interfacial Charge

Van der Waals heterostructures consisting of graphene and transition metal dichalcogenides have shown great promise for optoelectronic applications. However, an in-depth understanding of the critical processes for device operation, namely, interfacial charge transfer (CT) and recombination, has so far remained elusive. Here, we investigate these processes in graphene-WS2 heterostructures by complementarily probing the ultrafast terahertz photoconductivity in graphene and the transient absorption dynamics in WS2 following photoexcitation. We observe that separated charges in the heterostructure following CT live extremely long: beyond 1 ns, in contrast to ~1 ps charge separation reported in previous studies. This leads to efficient photogating of graphene. Furthermore, for the CT process across graphene-WS2 interfaces, we find that it occurs via photo-thermionic emission for sub-A-exciton excitations and direct hole transfer from WS2 to the valence band of graphene for above-A-exciton excitations. These findings provide insights to further optimize the performance of optoelectronic devices, in particular photodetection.

scholarly journals Ultrafast charge transfer in solid-state films of pristine cyanine borate and blends with fullerene

2015 ◽  
Vol 3 (20) ◽  
pp. 10935-10941 ◽  
Author(s):  
Jelissa De Jonghe-Risse ◽  
Jakob Heier ◽  
Frank Nüesch ◽  
Jacques-E. Moser
Keyword(s):  
Charge Transfer ◽  
Solid State ◽  
Charge Separation ◽  
Ion Pair ◽  
Acceptor Concentration ◽  
Ultrafast Charge Transfer

Kinetic competition between charge separation and intra-ion pair reductive quenching depends on the acceptor concentration and phase intermixing morphology.

scholarly journals What Controls the Rate of Ultrafast Charge Transfer and Charge Separation Efficiency in Organic Photovoltaic Blends

2016 ◽  
Vol 138 (36) ◽  
pp. 11672-11679 ◽  
Author(s):  
Andreas C. Jakowetz ◽  
Marcus L. Böhm ◽  
Jiangbin Zhang ◽  
Aditya Sadhanala ◽  
Sven Huettner ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Organic Photovoltaic ◽  
Charge Separation Efficiency ◽  
Ultrafast Charge Transfer

scholarly journals Anion-enhanced excited state charge separation in a spiro-locked N-heterocycle-fused push-pull zinc porphyrin

2021 ◽  
Author(s):  
Mandeep K. Chahal ◽  
Anuradha Liyanage ◽  
Ajyal Z. Alsaleh ◽  
Paul A. Karr ◽  
Jonathan P. Hill ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Charge Separation ◽  
Charge Transfer Complex ◽  
Zinc Porphyrin ◽  
New Type ◽  
State Charge

A new type of push–pull charge transfer complex, viz., a spiro-locked N-heterocycle-fused zinc porphyrin, ZnP-SQ, is shown to undergo excited state charge separation, which is enhanced by axial F− binding to the Zn center.

Ultrafast charge transfer at the electrode−electrolyte interface via an artificial dielectric layer

2021 ◽  
Vol 494 ◽  
pp. 229710
Author(s):  
Takashi Teranishi ◽  
Kaisei Kozai ◽  
Sou Yasuhara ◽  
Shintaro Yasui ◽  
Naoyuki Ishida ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Dielectric Layer ◽  
Electrolyte Interface ◽  
Artificial Dielectric ◽  
Ultrafast Charge Transfer

Ultrafast Charge Transfer and Relaxation at a Donor–Acceptor Interface

2021 ◽  
Author(s):  
Fernando Rodríguez Díaz ◽  
Hong-Guang Duan ◽  
R. J. Dwayne Miller ◽  
Michael Thorwart
Keyword(s):  
Charge Transfer ◽  
Donor Acceptor ◽  
Ultrafast Charge Transfer

Ultrafast charge transfer in MoS 2 /WSe 2 p–n Heterojunction

2D Materials ◽  
2016 ◽  
Vol 3 (2) ◽  
pp. 025020 ◽  
Author(s):  
Bo Peng ◽  
Guannan Yu ◽  
Xinfeng Liu ◽  
Bo Liu ◽  
Xiao Liang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Ultrafast Charge Transfer

Ultrafast Charge Transfer Pathways Through A Prototype Amino-Carboxylic Molecular Junction

Nano Letters ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 1955-1959 ◽  
Author(s):  
Gregor Kladnik ◽  
Michele Puppin ◽  
Marcello Coreno ◽  
Monica de Simone ◽  
Luca Floreano ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Molecular Junction ◽  
Ultrafast Charge Transfer

scholarly journals Coherent ultrafast charge transfer in an organic photovoltaic blend

2014 ◽  
Author(s):  
Antonietta De Sio ◽  
Sarah M. Falke ◽  
Carlo A. Rozzi ◽  
Daniele Brida ◽  
Margherita Maiuri ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Organic Photovoltaic ◽  
Ultrafast Charge Transfer
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