Photo-Induced Exciton Dynamics and Broadband Light Harvesting in ZnO Nanorod-Templated Multilayered Two-Dimensional MoS2/MoO3 Photoanodes for Solar Fuel Generation

2020 ◽  
Vol 3 (2) ◽  
pp. 1223-1231 ◽  
Author(s):  
Keshab Karmakar ◽  
Dipanjan Maity ◽  
Debashish Pal ◽  
Kalyan Mandal ◽  
Gobinda Gopal Khan
Keyword(s):  
Light Harvesting ◽  
Zno Nanorod ◽  
Two Dimensional ◽  
Solar Fuel ◽  
Exciton Dynamics ◽  
Solar Fuel Generation

scholarly journals Light Harvesting Proteins for Solar Fuel Generation in Bioengineered Photoelectrochemical Cells

2014 ◽  
Vol 15 (4) ◽  
pp. 374-384 ◽  
Author(s):  
Julian Ihssen ◽  
Artur Braun ◽  
Greta Faccio ◽  
Krisztina Gajda-Schrantz ◽  
Linda Thöny-Meyer
Keyword(s):  
Light Harvesting ◽  
Photoelectrochemical Cells ◽  
Solar Fuel ◽  
Solar Fuel Generation

Two-Dimensional Transition Metal MXene-Based Photocatalysts for Solar Fuel Generation

2019 ◽  
Vol 10 (12) ◽  
pp. 3488-3494 ◽  
Author(s):  
Lei Cheng ◽  
Xin Li ◽  
Huaiwu Zhang ◽  
Quanjun Xiang
Keyword(s):  
Transition Metal ◽  
Two Dimensional ◽  
Solar Fuel ◽  
Solar Fuel Generation

Exciton dynamics and annihilation in WS2 2D semiconductors

Nanoscale ◽  
2015 ◽  
Vol 7 (16) ◽  
pp. 7402-7408 ◽  
Author(s):  
Long Yuan ◽  
Libai Huang
Keyword(s):  
Two Dimensional ◽  
Time Resolved ◽  
Exciton Dynamics ◽  
2D Semiconductors ◽  
Time Resolved Photoluminescence ◽  
2D Crystals

We systematically investigate the exciton dynamics in monolayered, bilayered, and trilayered WS2 two-dimensional (2D) crystals by time-resolved photoluminescence (TRPL) spectroscopy.

scholarly journals Ultrafast Exciton Dynamics in Two Dimensional Covalent Organic Frameworks Reveals Size Dependence to Exciton Diffusion

2020 ◽  
Author(s):  
Nathan C. Flanders ◽  
Matthew S. Kirschner ◽  
Pyosang Kim ◽  
Thomas Fauvell ◽  
Austin Evans ◽  
...  
Keyword(s):  
High Performance ◽  
Transient Absorption ◽  
Domain Size ◽  
Spectroscopic Techniques ◽  
Two Dimensional ◽  
Exciton Dynamics ◽  
Singlet Exciton ◽  
Exciton Diffusion ◽  
Absorption Studies ◽  
Exciton Annihilation

<p>Large singlet exciton diffusion lengths are a hallmark of high performance in organic based devices such as photovoltaics, chemical sensors, and photodetectors. In this study, exciton dynamics of a two-dimensional covalent organic framework, COF- 5, is investigated using ultrafast spectroscopic techniques. Following photoexcitation, the COF-5 exciton decays via three pathways: 1) excimer formation (4 ± 2 ps), 2) excimer relaxation (160 ± 40 ps), and 3) excimer decay (>3 ns). Excitation fluence-dependent transient absorption studies suggest that COF-5 has a relatively large diffusion coefficient (0.08 cm2/s). Furthermore, exciton-exciton annihilation processes are characterized as a function of COF-5 crystallite domain size in four different samples, which reveal domain- size dependent exciton diffusion kinetics. These results reveal that exciton diffusion in COF-5 is constrained by its crystalline domain size. These insights indicate the outstanding promise of delocalized excitonic processes available in 2D COFs, which motivate their continued design and implementation into optoelectronic devices. </p>

A Mini-Review on Nanostructured g-C3N4 Photocatalysts for Solar Fuel Production

2021 ◽  
Vol 12 ◽  
Author(s):  
Maxwell Selase Akple ◽  
Gabriel Kwame Sipi Takyi
Keyword(s):  
Photocatalytic Performance ◽  
Electronic Band Structure ◽  
Future Research ◽  
Solar Fuel ◽  
Fuel Production ◽  
Electronic Band ◽  
Research Attention ◽  
Electron Hole Pair ◽  
Photocatalytic Material ◽  
Solar Fuel Generation

Graphitic carbon nitride (g-C3N4) is an important photocatalytic material that receives a lot of research attention globally. This is because of its favourable thermal and chemical stability as well as electronic band structure. However, the photocatalytic performance of the bulk g-C3N4 is limited by fast recombination of electron-hole pair and poor visible light-harvesting ability. Thus, different strategies, such as heterostructuring, nanotuning, doping, etc., have been adopted to overcome the aforementioned challenges to enhance the photocatalytic performance of g-C3N4. In recent times, various nanostructured g-C3N4 photocatalytic materials with various tuned morphologies have been designed and fabricated in literature for different photocatalytic activities. This mini-review summarized the progress development of nanostructured g-C3N4 photocatalysts with various tuned morphologies for solar fuel generation. The article briefly highlights the research status of various g-C3N4 with tuned morphologies and enhanced solar fuel generation abilities. Finally, a conclusion and future research were also suggested, opening up new areas on g-C3N4 photocatalysis.

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