scholarly journals Photoinduced Symmetry-Breaking Charge Separation: The Direction of the Charge Transfer

2011 ◽  
Vol 123 (33) ◽  
pp. 7738-7740 ◽  
Author(s):  
Vesna Markovic ◽  
Diego Villamaina ◽  
Igor Barabanov ◽  
Latevi Max Lawson Daku ◽  
Eric Vauthey
Keyword(s):  
Charge Transfer ◽  
Symmetry Breaking ◽  
Charge Separation

scholarly journals Solvent‐Dependent Singlet Fission in Diketopyrrolopyrrole Dimers: A Mediating Charge Transfer versus a Trapping Symmetry‐Breaking Charge Separation

2020 ◽  
Vol 10 (43) ◽  
pp. 2001496
Author(s):  
Ilias Papadopoulos ◽  
Maria João Álvaro‐Martins ◽  
Desiré Molina ◽  
Patrick M. McCosker ◽  
Paul A. Keller ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Symmetry Breaking ◽  
Charge Separation ◽  
Singlet Fission

scholarly journals Photoinduced Symmetry-Breaking Charge Separation: The Direction of the Charge Transfer

2011 ◽  
Vol 50 (33) ◽  
pp. 7596-7598 ◽  
Author(s):  
Vesna Markovic ◽  
Diego Villamaina ◽  
Igor Barabanov ◽  
Latevi Max Lawson Daku ◽  
Eric Vauthey
Keyword(s):  
Charge Transfer ◽  
Symmetry Breaking ◽  
Charge Separation

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.

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.

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
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