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

Comparison of charge transfer dynamics in polypyridyl ruthenium sensitizers for solar cells and water splitting systems

2018 ◽  
Vol 20 (11) ◽  
pp. 7710-7720 ◽  
Author(s):  
Iwona Grądzka ◽  
Mateusz Gierszewski ◽  
Jerzy Karolczak ◽  
Marcin Ziółek
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Photoelectrochemical Cells ◽  
Dye Sensitized ◽  
Charge Separation Efficiency ◽  
Charge Transfer Dynamics ◽  
Sensitized Solar Cells

Standard ruthenium components of dye-sensitized solar cells (sensitizer N719) and dye-sensitized photoelectrochemical cells (sensitizer RuP) are investigated to compare their photodynamics and charge separation efficiency.

Charge Carrier Transfer in Ta3N5 Photoanodes Prepared by Different Methods for Solar Water Splitting

2016 ◽  
Vol 69 (6) ◽  
pp. 631 ◽  
Author(s):  
Mingxue Li ◽  
Wenjun Luo ◽  
Liheng Yang ◽  
Xin Zhao ◽  
Zhigang Zou
Keyword(s):  
Electron Transfer ◽  
Charge Transfer ◽  
Water Splitting ◽  
Charge Separation ◽  
Preparation Method ◽  
Separation Efficiency ◽  
Interfacial Charge Transfer ◽  
Splitting Property ◽  
Charge Separation Efficiency ◽  
Interfacial Charge

The preparation method of a photoanode can affect its water splitting property. Here, as examples, we prepared Ta3N5 photoanodes by an electrophoresis deposition (EPD) method and an oxidation and nitridation of Ta foil (ONTF) method. The light harvest, interfacial charge transfer, and charge separation of the two Ta3N5 photoanodes were analysed to gain insight into the role of the preparation method on the water splitting property. The results suggested that the ONTF-prepared Ta3N5 showed a higher solar energy conversion efficiency, arising from its better interfacial charge transfer efficiency and higher charge separation efficiency. The higher charge separation efficiency was mainly attributed to good electron transfer, and the inter-particle connectivity was key for the electron transfer in the photoanodes. Especially, the dense, small particle structure of ONTF-prepared Ta3N5 was beneficial for increasing the connectivity between inter-particles. This comparison of preparation methods can be used as a reference for future photoanode preparation to improve the water splitting property of photoelectrochemical cells.

Constructing 2D/2D interfacial contact in ReS2/TiO2 via Ti-S bond for efficient charge transfer in photocatalytic hydrogen production

2021 ◽  
Author(s):  
Yanan Wang ◽  
Rongrong Shi ◽  
Kai Song ◽  
Chunyang Liu ◽  
Fang He
Keyword(s):  
Charge Transfer ◽  
Hydrogen Production ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Photocatalytic Hydrogen Production ◽  
Interfacial Contact ◽  
Efficient Charge ◽  
Transport Path ◽  
Charge Separation Efficiency

Exploring and adjusting the transport path of photo-generated carriers is vital to promote charge separation efficiency and charge transfer ability for photocatalytic hydrogen performance of novel semiconductor composites. Herein, this...

scholarly journals MXene-Ti3C2 assisted one-step synthesis of carbon-supported TiO2/Bi4NbO8Cl heterostructures for enhanced photocatalytic water decontamination

Nanophotonics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 2077-2088 ◽  
Author(s):  
Daixun Jiang ◽  
Xun Sun ◽  
Xilu Wu ◽  
Shuai Zhang ◽  
Xiaofei Qu ◽  
...  
Keyword(s):  
Charge Separation ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Salt Flux ◽  
The Novel ◽  
Water Contaminants ◽  
Photocatalytic Removal ◽  
One Step ◽  
Charge Separation Efficiency ◽  
Perovskite Type

AbstractThe strategy to improve the photocatalytic removal efficiencies towards organic pollutants is still a challenge for the novel Sillen–Aurivillius perovskite type Bi4NbO8Cl. Herein, we report carbon-supported TiO2/Bi4NbO8Cl (C-TiO2/Bi4NbO8Cl) heterostructures with enhanced charge separation efficiency, which were fabricated via molten-salt flux process. The carbon-supported TiO2 particles were derived from MXene Ti3C2 precursors, and attached on plate-like Bi4NbO8Cl, acting as electron-traps to achieve supressed recombination of photo-induced charges. The improved charge separation confers C-TiO2/Bi4NbO8Cl heterostructures superior photocatalytic performance with 53% higher than pristine Bi4NbO8Cl, towards rhodamine B removal with the help of photo-induced holes. Moreover, the C-TiO2/Bi4NbO8Cl heterostructures can be expanded to deal with other water contaminants, such as methyl orange, ciprofloxacin and 2,4-dichlorophenol with 44, 25 and 13% promotion, respectively, and thus the study offers a series of efficient photocatalysts for water purification.

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.

Photoexcited charge carrier dynamics of interconnected TiO2 nanoparticles: evidence of enhancement of charge separation at anatase–rutile particle interfaces

2018 ◽  
Vol 20 (5) ◽  
pp. 3484-3489 ◽  
Author(s):  
Daiki Shingai ◽  
Yusuke Ide ◽  
Woon Yong Sohn ◽  
Kenji Katayama
Keyword(s):  
Charge Carrier ◽  
Tio2 Nanoparticles ◽  
Hydrothermal Treatment ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Carrier Dynamics ◽  
Charge Carrier Dynamics ◽  
Charge Separation Efficiency ◽  
Photoexcited Charge Carrier

Hydrothermal treatment can improve the charge separation efficiency of P25.

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

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 Self-template synthesis of ATiO3 (A = Ba, Pb and Sr) perovskites for photocatalytic removal of NO

RSC Advances ◽  
2017 ◽  
Vol 7 (44) ◽  
pp. 27397-27404 ◽  
Author(s):  
Shiyi Cai ◽  
Shan Yu ◽  
Wenchao Wan ◽  
Wen Wen ◽  
Ying Zhou
Keyword(s):  
Template Synthesis ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Light Response ◽  
Photocatalytic Removal ◽  
Charge Separation Efficiency

ATiO3 were synthesized from TiO2 nanosheets dominated with {001} facets, PbTiO3 possesses the highest activity as a result of larger light response and higher charge separation efficiency.

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