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HgCr2Se4(p) as a new semiconducting photoelectrode in aqueous solution

✍ Scribed by A.M. Redon

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
238 KB
Volume
29
Category
Article
ISSN
0013-4686

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✦ Synopsis

In this preliminary work we were interested in a new semiconducting material, HgCrzSe,, which, doped with Al, presents a p-type behaviour. It was used as a photoelectrode in a classical cell. In this work, experiments werecarriedout in0.t N H,SO,andO.l N NaOH media. Thefaceexposedto theelectrolytewas the growing face (111). The photocurrent shape presents unusual peaks and hysteresis. The evolution of the photocurrent was then tested in the presence of LiCIO, and CsI. We observed a shift of the photocurrent peak which could bc due to a shift ofthe flat-band potential. Also, an oxidation peak on the dark current was observed at +0.8 mV (sme) in the presence of Csl. When the redox couple I-/I, is introduced in the solution. we obtain a cathodic photocurrent peak at + 0.100 mV (sme)

πŸ“œ SIMILAR VOLUMES

The Crystal Structure of Bi2PbMnO4(PO4)2
The Crystal Structure of Bi2PbMnO4(PO4)2, a Member of a New Solid Solution Series in the Bi–Pb–Mn–P Oxide System
✍ Olivier Cousin; Marielle Huve; Pascal Roussel; Olivier Perez; Hugo Steinfink πŸ“‚ Article πŸ“… 2002 πŸ› Elsevier Science 🌐 English βš– 604 KB

Single crystals of a new oxyphosphate were found while exploring the Bi+Pb+Mn+P oxide phase diagram. The reaction product from a mixture of Bi 2 O 3 , PbO, MnO 2 , and (NH 4 ) 2 HPO 4 in the ratio 1:1:2:2 displayed several phases including a Bi-rich phase with the approximate composition (Bi 3؊x Pb