Semiconductor Electrochemistry (Wiley-Vch)

By RĂ¼diger Memming

Semiconductor electrochemistry offers with many facets, starting from basic semiconductor physics to complicated results, reminiscent of cost move procedures at semiconductor-liquid surfaces or photoreactions at semiconductor debris. Its purposes conceal very important fields of current and destiny know-how together with solar power conversion or semiconductor machine expertise, micromachining, and nanotechnology.

Providing either an advent and an up to date survey to the entire box, this article captivates by means of its transparent kind and encouraging, but strong presentation. Rüdger Memming, an said specialist, basically addresses actual chemists
and electrochemists, yet fabrics scientists, physicists, and engineers facing semiconductor know-how and its purposes also will gain enormously from this article.

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Catalysis of Electrode Reactions . . . . . . . . . . . . . . . . . . . . . . 209 212 214 220 225 226 230 233 236 eight eight. 1 eight. 1. 1 eight. 1. 2 eight. 1. three eight. 1. four eight. 2 eight. three eight. four eight. five Electrochemical Decomposition of Semiconductors . . . . . . . . . . . Anodic Dissolution Reactions . . . . . . . . . . . . . . . . . . . . . . . . Germanium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Silicon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anodic Formation of Amorphous (Porous) Silicon . . . . . . . . . . . . Compound Semiconductors . . . . . . . . . . . . . . . . . . . . . . . . . Cathodic Decomposition . . . . . . . . . .

Floor Recombination . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 22 24 25 29 33 36 39 forty-one forty four three three. 1 three. 1. 1 three. 1. 2 three. 2 three. 2. 1 three. 2. 2 three. 2. three three. 2. four Electrochemical platforms . . . . . . . . . . . . . . . . . . . . . . . . . . . forty six Electrolytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . forty six Ion shipping in suggestions . . . . . . . . . . . . . . . . . . . . . . . . . . forty six interplay among Ions and Solvent . . . . . . . . . . . . . . . . . . . forty eight Potentials and Thermodynamics of Electrochemical Cells . . . . . . . . SO Chemical and Electrochemical Potentials . . . . . . . . . . . . . . . . . 50 mobile Voltages . . . . . . . . . . . . . .

Investigations of Redox Reactions by way of Linear Sweep Voltametry . . . . standards for Reversible and Irreversible Reactions . . . . . . . . . . . . Qualitative Description of Current-Potential Curves at Semiconductor Electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . One-step Redox Reactions . . . . . . . . . . . . . . . . . . . . . . . . . 151 151 151 159 163 164 7. 1 7. 1. 1 7. 1. 2 7. 1. three 7. 1. four 7. 2 7. three a hundred sixty five 167 Contents IX 7. four. four 7. five 7. 6 7. 7 7. 7. 1 7. 7. 2 7. eight 7. nine The Energetics of cost move tactics . . . . . . . . . . . . . . . Quantitative Derivation of Current-Potential Curves .

6. ninety seven) describes only a unmarried ordinary technique, while in an test the potential for electron move from one molecule to many different acceptors should be thought of and we need to combine over the total house. as a result, ket is a neighborhood cost consistent. this is often illustrated in Fig. 6. 18. Fig. 6. 18 Geometric concerns for the calculation of genuine price constants the speed consistent okay might be relating to ket through k(cm3s)-' = 1 ketFsphered r (6. 119) 148 6 Electron move Theories c5phcrr within which is the skin of the donor sphere.

Four. 2. this can be a hugely compatible reference electrode simply because its power is particularly consistent due to the low solubility of HgzC12. Its common capability is Uo(SCE) = zero. 27 V vs. NHE. one other virtue is its independence of pH. related stipulations are met for the couple AglAgCl with a typical strength of U" = zero. 23 V vs. NHE. relating to water-free natural electrolytes, usually an easy redox procedure of identified strength is used, that is additionally separated from the most answer through a salt bridge [ 1-51, to prevent artifacts in impedance measurements while modulating the enter voltage of the potentiostat at excessive frequencies ( > l o kHz), the reference electrode will be short-circuited through a capacitance of 10 nF and a Pt cord dipped into the answer often a part of the mobilephone (Fig.

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