scholarly journals The binding energy and dynamics of charge-transfer states in organic photovoltaics with low driving force for charge separation

2019 ◽  
Vol 150 (10) ◽  
pp. 104704 ◽  
Author(s):  
Yifan Dong ◽  
Hyojung Cha ◽  
Jiangbin Zhang ◽  
Ernest Pastor ◽  
Pabitra Shakya Tuladhar ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Binding Energy ◽  
Organic Photovoltaics ◽  
Charge Separation ◽  
Driving Force

scholarly journals Charge transfer in the weak driving force limit in blends of MDMO-PPV and dithienylthiazolo[5,4-d]thiazoles towards organic photovoltaics with high VOC

2012 ◽  
Vol 14 (45) ◽  
pp. 15774 ◽  
Author(s):  
Nissy Nevil ◽  
Yun Ling ◽  
Sarah Van Mierloo ◽  
Jurgen Kesters ◽  
Fortunato Piersimoni ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Organic Photovoltaics ◽  
Driving Force

scholarly journals On the energetics of bound charge-transfer states in organic photovoltaics

2017 ◽  
Vol 5 (23) ◽  
pp. 11949-11959 ◽  
Author(s):  
Jiangbin Zhang ◽  
Andreas C. Jakowetz ◽  
Guangru Li ◽  
Dawei Di ◽  
S. Matthew Menke ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Binding Energy ◽  
Organic Photovoltaics ◽  
Charge Transfer State ◽  
Optical Control ◽  
Organic Photovoltaic ◽  
Photovoltaic Systems ◽  
Temperature Dependent ◽  
Transfer State

Using temperature-dependent optical-control spectroscopy, we show that the binding energy of localised charge-transfer state is about 90 meV in a range of organic photovoltaic systems.

Charge transfer from internal electrostatic fields is superior to surface defects for 2,4-dichlorophenol degradation in K3−xNaxB6O10Br photocatalysts

Nanoscale ◽  
2018 ◽  
Vol 10 (43) ◽  
pp. 20443-20452 ◽  
Author(s):  
Xiaoyun Fan ◽  
Yang Zhang ◽  
Kangdi Zhong
Keyword(s):  
Charge Transfer ◽  
Charge Separation ◽  
Driving Force ◽  
Surface Defects ◽  
Degradation Process ◽  
Electrostatic Fields

The driving force from the bulk could offer greater motivation for charge separation than from surface defects during 2,4-DCP degradation process.

scholarly journals Hole delocalization as a driving force for charge pair dissociation in organic photovoltaics

2019 ◽  
Vol 6 (5) ◽  
pp. 1050-1056 ◽  
Author(s):  
Andrew B. Matheson ◽  
Arvydas Ruseckas ◽  
Scott J. Pearson ◽  
Ifor D. W. Samuel
Keyword(s):  
Free Energy ◽  
Organic Photovoltaics ◽  
Charge Separation ◽  
Driving Force ◽  
Polymer Chains

Hole polaron delocalization on polymer chains helps charge separation by lowering the free energy of the spatially separated charge pair.

Hot charge-transfer excitons set the time limit for charge separation at donor/acceptor interfaces in organic photovoltaics

2012 ◽  
Vol 12 (1) ◽  
pp. 66-73 ◽  
Author(s):  
Askat E. Jailaubekov ◽  
Adam P. Willard ◽  
John R. Tritsch ◽  
Wai-Lun Chan ◽  
Na Sai ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Organic Photovoltaics ◽  
Charge Separation ◽  
Time Limit ◽  
Donor Acceptor ◽  
Charge Transfer Excitons

The lowest-energy charge-transfer state and its role in charge separation in organic photovoltaics

2016 ◽  
Vol 18 (26) ◽  
pp. 17546-17556 ◽  
Author(s):  
Guangjun Nan ◽  
Xu Zhang ◽  
Gang Lu
Keyword(s):  
Charge Transfer ◽  
Quantum Efficiency ◽  
Charge Separation ◽  
Driving Force ◽  
Internal Quantum Efficiency ◽  
Energy Charge ◽  
Charge Transfer State ◽  
Dynamic Disorder ◽  
Configuration Entropy ◽  
Transfer State

The localized charge transfer state can lead to >90% internal quantum efficiency provided by the driving force from dynamic disorder and configuration entropy.

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.

Organic Photovoltaics: Photovoltaic Function and Exciton/Charge Transfer Dynamics in a Highly Efficient Semiconducting Copolymer (Adv. Funct. Mater. 1/2014)

2014 ◽  
Vol 24 (1) ◽  
pp. 2-2
Author(s):  
Jodi M. Szarko ◽  
Brian S. Rolczynski ◽  
Sylvia J. Lou ◽  
Tao Xu ◽  
Joseph Strzalka ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Organic Photovoltaics ◽  
Highly Efficient ◽  
Charge Transfer Dynamics
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