Reversible and irreversible redox series as probes of fundamental aspects of charge transfer across InP, WSe/sub 2/, and SnS/sub 2//acetonitrile interfaces: Progress report, May 15, 1986-May 14, 1987
Kinetics at metal electrode/solution interfaces has been studied for decades and the understanding of electron transfer processes is relatively mature. Despite numerous experimental studies during the past 10 years, many fundamental questions regarding redox processes at semiconductor/liquid junctions, even in the absence of light, remain unanswered. We have attempted to resolve some of these questions by making measurements that are analogous to those that were crucial for detailed understanding of electrochemistry at metals. The key aspects of our semiconductor studies are: (1) use of semiconducting materials and surface preparations that result in reproducible and stable interfacial energetics; (2) using both p- and n-type electrodes with a wide range of doping densities; (3) use of nonaqueous solvents to minimize surface corrosion processes; (4) thorough characterization of the interfacial energetics by measuring the capacitance of the space charge region over the same regions of electrode potential used in voltammetric experiments; and (5) use of substituted metallocenes as solution redox probes in order to insure 1e/sup -/, outer-sphere reactions with varying reduction potentials yet constant reorganization energies. 22 refs., 3 figs., 2 tabs.
- Research Organization:
- Colorado Univ., Boulder (USA)
- DOE Contract Number:
- FG02-84ER13247
- OSTI ID:
- 6836288
- Report Number(s):
- DOE/ER/13247-3; ON: DE87003994
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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