Luminescent Properties of Semiconductor Photoelectrodes

Ellis, Arthur B.; Karas, Bradley R.

doi:10.1021/ba-1980-0184.ch011

Cited by 6 publications

(7 citation statements)

References 15 publications

(18 reference statements)

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“…The recombination current consists os a radiationless part and a radiative part, the latter being exceedingly small, however (21). essarily equal to 1 in this case, as surface recombination still might occur, as suggested by the quantum efficiencies in Fig.…”

Section: Correlation Between Quantum Yield and Output Stability--a Mo...mentioning

confidence: 74%

The Relation Between Performance and Stability of Cd‐Chalcogenide/Polysulfide Photoelectrochemical Cells: I . Model and the Effect of Photoetching

Tenne

Müller

Mirovsky

et al. 1983

J. Electrochem. Soc.

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tion of performance under both conditions, which are possibly already cathodic to VFB. Hence, the corrosion at --0.5V vs. SCE is not really meaningful or unique to acidic solution conditions.With regard to the open-circuit dissolution, we have found a typical rate of dissolution under open circuit of 3-7 ~m in 24 hr. Hardee and Bard's films varying in thickness from 1-6 ~m should, therefore, exhibit short life. The stable photocurrent observed in this work clearly shows the advantages of using thick electrodes. However, the observed stable performance also means that the new surface exposed to the electrolyte as the electrode dissolved was not significantly different from the initial outer surface. If the stability that was observed in this work for over 80 hr continues, inexpensive sintered polycrystalline electrodes could last for several years while photoelectrolyzing water in acidic merdia.

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Section: Correlation Between Quantum Yield and Output Stability--a Mo...mentioning

confidence: 74%

The Relation Between Performance and Stability of Cd‐Chalcogenide/Polysulfide Photoelectrochemical Cells: I . Model and the Effect of Photoetching

Tenne

Müller

Mirovsky

et al. 1983

J. Electrochem. Soc.

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show abstract

“…Our early studies examined many of the phenomena observed for n-ZnO using n-CdS:Te electrodes (36)(37)(38). The selection of CdS:Te was made with the expectation that its PEC properties would mimic those for CdS, from which stable PEC's had been constructed, and that it would be very emissive at room temperature (39)(40)(41)(42)(43)(44).…”

Section: B N-cds:tementioning

confidence: 99%

Luminescent Properties of Semiconductor Electrodes.

Ellis¹

1985

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“…Parallel shifts have also been reported for CdS:Te absorption and excitation spectra over subambient temperature ranges (13). These spectra incorporate a low-energy band which distinguishes CdS:Te from CdS and, in fact, masks the exact position of the CdS:Te band gap (7,8,11,12,13). Several other features of the CdS:Te emission spectrum are particularly relevant in the context of PEC experiments.…”

Section: '4mentioning

confidence: 99%

“…The photocurrent enhancement for 514.5 nm excitation is a predictable consequence of an absorption edge which red shifts with te.=perature: As the absorptivity for 514.5 nm light increases with temperature, progressively larger fractions of light will be absorbed in the depletion region. In this sense the accelerated decline in emission intensity observed for 514.5 n= relative to 501.7 nm excitation (Figure 1) may include a contribution reflecting decreasing optical penetration depth; weaker emission would be expected as 514.5 nm light acquires status as an ultraband gap wavelength, since near-surface nonradiative recombination sites could play a more significant role in excited-state deactivation (7,8).…”

Section: '4mentioning

confidence: 99%