Charge Transfer Dynamics in Aqueous Dye-Sensitized Photoelectrochemical Cells: Implications for Water Splitting Efficiency

2018 ◽  
Vol 123 (1) ◽  
pp. 299-305 ◽  
Author(s):  
Pengtao Xu ◽  
Thomas E. Mallouk
Keyword(s):  
Charge Transfer ◽  
Water Splitting ◽  
Photoelectrochemical Cells ◽  
Dye Sensitized ◽  
Charge Transfer Dynamics

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.

scholarly journals Metal-free organic sensitizers for use in water-splitting dye-sensitized photoelectrochemical cells

2015 ◽  
Vol 112 (6) ◽  
pp. 1681-1686 ◽  
Author(s):  
John R. Swierk ◽  
Dalvin D. Méndez-Hernández ◽  
Nicholas S. McCool ◽  
Paul Liddell ◽  
Yuichi Terazono ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Red Light ◽  
Photoelectrochemical Cells ◽  
Slow Electron ◽  
Free Base ◽  
Metal Free ◽  
Dye Sensitized ◽  
Water Photoelectrolysis ◽  
Organic Sensitizers

Solar fuel generation requires the efficient capture and conversion of visible light. In both natural and artificial systems, molecular sensitizers can be tuned to capture, convert, and transfer visible light energy. We demonstrate that a series of metal-free porphyrins can drive photoelectrochemical water splitting under broadband and red light (λ > 590 nm) illumination in a dye-sensitized TiO2 solar cell. We report the synthesis, spectral, and electrochemical properties of the sensitizers. Despite slow recombination of photoinjected electrons with oxidized porphyrins, photocurrents are low because of low injection yields and slow electron self-exchange between oxidized porphyrins. The free-base porphyrins are stable under conditions of water photoelectrolysis and in some cases photovoltages in excess of 1 V are observed.

scholarly journals Correction: Design and development of photoanodes for water-splitting dye-sensitized photoelectrochemical cells

2017 ◽  
Vol 46 (2) ◽  
pp. 559-559 ◽  
Author(s):  
John R. Swierk ◽  
Thomas E. Mallouk
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Cells ◽  
Design And Development ◽  
Dye Sensitized

Correction for ‘Design and development of photoanodes for water-splitting dye-sensitized photoelectrochemical cells’ by John R. Swierk et al., Chem. Soc. Rev., 2013, 42, 2357–2387.

scholarly journals Photo-induced charge transfer dynamics in the dye-sensitized solar cells based on the gel electrolytes

2017 ◽  
Vol 48 (1) ◽  
pp. 74-84
Author(s):  
Danni Zhang ◽  
Jie Liu ◽  
Wangnan Li ◽  
Meihua Chen ◽  
Jingyang Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Gel Electrolytes ◽  
Induced Charge ◽  
Charge Transfer Dynamics ◽  
Sensitized Solar Cells

scholarly journals Considerations for the Accurate Measurement of Incident Photon to Current Efficiency in Photoelectrochemical Cells

2022 ◽  
Vol 9 ◽  
Author(s):  
David S. Ellis ◽  
Yifat Piekner ◽  
Daniel A. Grave ◽  
Patrick Schnell ◽  
Avner Rothschild
Keyword(s):  
Charge Transfer ◽  
Current Efficiency ◽  
White Light ◽  
Photoelectrochemical Cells ◽  
Mirror Stage ◽  
Incident Photon ◽  
State Response ◽  
Pec Cells ◽  
Charge Transfer Dynamics ◽  
Composition Changes

In this paper we review some of the considerations and potential sources of error when conducting Incident Photon to Current Efficiency (IPCE) measurements, with focus on photoelectrochemical (PEC) cells for water splitting. The PEC aspect introduces challenges for accurate measurements often not encountered in dry PV cells. These can include slow charge transfer dynamics and, depending on conditions (such as a white light bias, which is important for samples with non-linear response to light intensity), possible composition changes, mostly at the surface, that a sample may gradually undergo as a result of chemical interactions with the aqueous electrolyte. These can introduce often-overlooked dependencies related to the timing of the measurement, such as a slower measurement requirement in the case of slow charge transfer dynamics, to accurately capture the steady-state response of the system. Fluctuations of the probe beam can be particularly acute when a Xe lamp with monochromator is used, and longer scanning times also allow for appreciable changes in the sample environment, especially when the sample is under realistically strong white light bias. The IPCE measurement system and procedure need to be capable of providing accurate measurements under specific conditions, according to sample and operating requirements. To illustrate these issues, complications, and solution options, we present example measurements of hematite photoanodes, leading to the use of a motorized rotating mirror stage to solve the inherent fluctuation and drift-related problems. For an example of potential pitfalls in IPCE measurements of metastable samples, we present measurements of BiVO4 photoanodes, which had changing IPCE spectral shapes under white-light bias.

scholarly journals Charge Transfer Dynamics at Dye-Sensitized ZnO and TiO2 Interfaces Studied by Ultrafast XUV Photoelectron Spectroscopy

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Mario Borgwardt ◽  
Martin Wilke ◽  
Thorsten Kampen ◽  
Sven Mähl ◽  
Manda Xiao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Photoelectron Spectroscopy ◽  
Dye Sensitized ◽  
Charge Transfer Dynamics
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