Insights into the limitations of solar cells sensitized with ruthenium dyes revealed in time-resolved spectroscopy studies

2017 ◽  
Vol 19 (31) ◽  
pp. 20463-20473 ◽  
Author(s):  
Mateusz Gierszewski ◽  
Iwona Grądzka ◽  
Adam Glinka ◽  
Marcin Ziółek
Keyword(s):  
Solar Cells ◽  
Conduction Band ◽  
Time Scale ◽  
Electron Recombination ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Spectroscopy Studies ◽  
Ruthenium Dyes

An important limitation in the photocurrent of solar cells sensitized with Ru dyes and filled with cobalt electrolyte is electron recombination between titania conduction band (CB) and oxidized dyes, which occurs on the sub-ns time scale.

Time-resolved spectroscopy of charge transfer phenomena in organic solar cells

2015 ◽  
Author(s):  
Marina Gerhard ◽  
Andreas Arndt ◽  
Aina Quintilla ◽  
Arash Rahimi-Iman ◽  
Uli Lemmer ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

scholarly journals Reduced electron recombination of dye-sensitized solar cells based on TiO2 spheres consisting of ultrathin nanosheets with [001] facet exposed

2012 ◽  
Vol 3 ◽  
pp. 378-387 ◽  
Author(s):  
Hongxia Wang ◽  
Meinan Liu ◽  
Cheng Yan ◽  
John Bell
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Conduction Band ◽  
Dye Sensitized Solar Cells ◽  
Post Treatment ◽  
Electron Recombination ◽  
Effective Electron ◽  
Dye Sensitized ◽  
Ultrathin Nanosheets ◽  
Sensitized Solar Cells

An anatase TiO2 material with hierarchically structured spheres consisting of ultrathin nanosheets with 100% of the [001] facet exposed was employed to fabricate dye-sensitized solar cells (DSCs). Investigation of the electron transport and back reaction of the DSCs by electrochemical impedance spectroscopy showed that the spheres had a threefold lower electron recombination rate compared to the conventional TiO2 nanoparticles. In contrast, the effective electron diffusion coefficient, D n, was not sensitive to the variation of the TiO2 morphology. The TiO2 spheres showed the same D n as that of the nanoparticles. The influence of TiCl4 post-treatment on the conduction band of the TiO2 spheres and on the kinetics of electron transport and back reactions was also investigated. It was found that the TiCl4 post-treatment caused a downward shift of the TiO2 conduction band edge by 30 meV. Meanwhile, a fourfold increase of the effective electron lifetime of the DSC was also observed after TiCl4 treatment. The synergistic effect of the variation of the TiO2 conduction band and the electron recombination determined the open-circuit voltage of the DSC.

Use of Ultrafast Time-Resolved Spectroscopy to Demonstrate the Effect of Annealing on the Performance of P3HT:PCBM Solar Cells

2015 ◽  
Vol 7 (8) ◽  
pp. 4457-4462 ◽  
Author(s):  
Yu-Ting Wang ◽  
Mei-Hsin Chen ◽  
Chao-Ting Lin ◽  
Jian-Jhih Fang ◽  
Che-Jui Chang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Comparison of TiO2 and ZnO Solar Cells Sensitized with an Indoline Dye: Time-Resolved Laser Spectroscopy Studies of Partial Charge Separation Processes

Langmuir ◽  
2014 ◽  
Vol 30 (9) ◽  
pp. 2505-2512 ◽  
Author(s):  
Jan Sobuś ◽  
Gotard Burdziński ◽  
Jerzy Karolczak ◽  
Jesús Idígoras ◽  
Juan A. Anta ◽  
...  
Keyword(s):  
Solar Cells ◽  
Laser Spectroscopy ◽  
Charge Separation ◽  
Partial Charge ◽  
Separation Processes ◽  
Time Resolved ◽  
Spectroscopy Studies

Does the photoredox reaction affect the photorelease of anthraquinone protected benzaldehyde? A time-resolved spectroscopic study

2020 ◽  
Vol 22 (28) ◽  
pp. 15900-15907
Author(s):  
Yan Guo ◽  
Tongyu Xu ◽  
Jiani Ma
Keyword(s):  
Density Functional Theory ◽  
Reaction Mechanism ◽  
Spectroscopic Study ◽  
Density Functional ◽  
Functional Theory ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Dft Computations ◽  
Spectroscopy Studies

Time-resolved spectroscopy studies coupled with the results from density functional theory (DFT) computations were utilized to unravel the photodeprotection reaction mechanism of Aqe-diol-PPG and the photoredox of photoproduct Aqe-diol.

Time-resolved spectroscopy studies of Gd2SiO5:Ce3+ from spherical particles

2002 ◽  
Vol 344 (1-2) ◽  
pp. 323-326 ◽  
Author(s):  
J Flor ◽  
A.M Pires ◽  
M.R Davolos ◽  
M Jafelicci
Keyword(s):  
Spherical Particles ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Spectroscopy Studies
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