Defect Chemistry

Defect Chemistry

The ionic point defects are the decisive ionic carriers in solids comparable to H+ and OH- in water or electrons and holes in semiconductors (see figures below). Their concentration and mobilities determine electrical and chemical transport properties as well as the kinetics of solid state reactions. For dilute defects, their concentrations can be quantitatively described by mass action laws.

<p>formation of point defects from J. Maier (1993)</p> Zoom Image

formation of point defects from J. Maier (1993)

defects as acid-base active centers from J. Maier (2001) Zoom Image
defects as acid-base active centers from J. Maier (2001)

Research areas:

Establishing of defect models (defect concentrations in dependence of control parameters such as temperature, partial pressures, doping concentrations, etc.)

  • Defect-defect interactions
  • Defect chemistry in boundary regions
  • Defect chemistry in frozen-in situations

Survey papers:

  • J. Maier: Defect Chemistry: Composition, Transport, and Reactions in the Solid State; Part I: Thermodynamics, Angewandte Chemie International Edition 32(3), 313–335 (1993). DOI: 10.1002/anie.199303133
  • J. Maier: Acid-Base Centers and Acid-Base Scales in Ionic Solids Chemistry — A European Journal 7(22), 4762–4770 (2001). DOI: 10.1002/1521-3765(20011119)7:22<4762::aid-chem4762>3.0.CO;2-F
  • J. Maier: Solid State Electrochemistry I: Thermodynamics and Kinetics of Charge Carriers in Solids, Modern Aspects of Electrochemistry, B. E. Conway, C. G. Vayenas, and R. E. White, eds., number 38, Kluwer Academic/Plenum Publishers, New York, 2005, pages 1–173. DOI: 10.1007/b106562
  • J. Maier: Solid State Electrochemistry II: Devices and Techniques, Modern Aspects of Electrochemistry, C. G. Vayenas, R. E. White, and M. E. Gamboa-Adelco, eds., number 41, Springer, New York, 2007, pages 1–138. DOI: 10.1007/978-0-387-46108-3

Current Projects:      

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