Photogalvanic cells

Albery, W. John; Bartlett, Philip N.; Bowen, W. Richard; Fisher, F. Stephen; Foulds, Andrew W.

doi:10.1016/s0022-0728(79)80004-2

Cited by 19 publications

(8 citation statements)

References 16 publications

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“…For n = 1 S~ = 1/1(1 + A) and hence Eq. [12] holds for all values of n. We therefore obtain the gratifyingly simple result that JJJo = n/(1 + ko'/k,') [14] This equation has exactly the same form as the current voltage curve for a single-electron transfer. This is because in our model each electron has the chance kl'/(k,' + kD') of being transferred at the electrode.…”

Section: S+= 1+--(1+s) [13] N+lmentioning

confidence: 96%

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The Electrochemistry of Colloidal Semiconductor Particles: Theory

Albery

Bartlett

Porter

1984

J. Electrochem. Soc.

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The distribution of majority carriers in a collection of colloidal semiconductor particles is calculated. The kinetics of electron transfer from such particles to a macroscopic electrode are considered. Although each particle may have hundreds of electrons, the kinetics are shown to obey the simple equations of classical electrochemistry, such as the Tafel relation. The effect of illuminating the particles and photogenerating majority carriers is also considered. Again, the classical results for the photoelectrochemistry on a transparent rotating disk electrode are obtained, providing that account is taken of the much slower diffusion of the particles.

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Section: S+= 1+--(1+s) [13] N+lmentioning

confidence: 96%

“…The series may be summed up by the method of induction. We assume that the sum S,, is given by S,, = n/(1 + X) [12] Then A )-1…”

Section: I=0mentioning

confidence: 99%

The Electrochemistry of Colloidal Semiconductor Particles: Theory

Albery

Bartlett

Porter

1984

J. Electrochem. Soc.

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“…2, giving distribution functions shown in Fig. 4. Despite the complex behavior in conclusions (1) and (2), providing that the electrochemical rate constant is independent of the number of electrons in the conduction band, the Tafel relation will be obeyed.…”

mentioning

confidence: 95%

“…These results were obtained using the optical rotating disk electrode (ORDE) (2)(3)(4). In this paper, we report experimental results designed to test the model presented and the relations derived.…”

mentioning

confidence: 99%

The Electrochemistry of Colloidal Semiconductor Particles: Experiments on and

Albery

Bartlett

Porter

1984

J. Electrochem. Soc.

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Results are presented for the dark electrochemistry and photoelectrochemistry of CdS and TiO2 colloidal particles studied with the optical rotating disk electrode (ORDE). The electron-transfer reactions between the particles and the electrode are found to be irreversible. However, in agreement with theoretical predictions, the kinetics obey both the Tafel and Levich relations. Several hundred electrons may be transferred on each encounter between a particle and the ORDE. Added halide ions are shown to be good scavengers for photogenerated holes. Results for the quantum efficiencies for the photogeneration of majority carriers are reported.

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“…semithionine in Scheme 4, and 4, is the fraction of semithionine that is converted to leucothionine ; with no added [FeIII] $, = $. 6 Typical results are plotted according to equation (4) in Figure 6.…”

Section: Ementioning

confidence: 99%

Photogalvanic cells. Part 14. The synthesis and characterization of disulphonated thionines

Albery¹,

Bartlett²,

Foulds³

et al. 1981

J. Chem. Soc., Perkin Trans. 2

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Two reasons for the poor performance of the iron-thionine photogalvanic cell are first the low solubility of thionine, which means that the incident solar radiation is absorbed too far from the illuminated electrode, and secondly the formation of dimers which do not undergo the desired photoredox reaction. The synthesis and photoelectrochemical characterization of several isomeric disulphonated thionines are reported. All the isomers examined are sufficiently soluble to absorb solar radiation close to the illuminated electrode of a photogalvanic cell and show no evidence of dimerization via stacking interactions a t concentrations up to 1 O-3M. Using the following techniques, the transparent disc electrode, flash photoelectrolysis, and stopped flow, the kinetic parameters have been determined to see how well the conditions needed for an efficient photogalvanic system are met. The 4,6-isomer of disulphonated thionine is the only isomer that fulfills the required kinetic constraints.

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Photogalvanic cells

Cited by 19 publications

References 16 publications

The Electrochemistry of Colloidal Semiconductor Particles: Theory

The Electrochemistry of Colloidal Semiconductor Particles: Theory

The Electrochemistry of Colloidal Semiconductor Particles: Experiments on and

Photogalvanic cells. Part 14. The synthesis and characterization of disulphonated thionines

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