TSDC is a high-resolution technique to investigate the electrical properties of high-resistivity materials by studying the thermal relaxations and the transport processes.
Apply a DC electric field E
p at a temperature T p for a time t p. With the electric field still applied, the temperature is quickly dropped to below T
p. Once the temperature is stabilized, the electric field is turned off and the temperature is increased at a selected rate b while the depolarization current is recorded.
Processes captured by TSCD strongly depend on:
Tested sample properties: textural, morphological, and chemical.
Experimental conditions: E
p, T p, t p and b
Examples of processes studied by TSDC technique:
Ageing (Polymers and ceramics)
Charge carriers trapping, density and mobility
Bulk thermal relaxations
Instruments and Specifications
In-house built system: pA meter, amplifier and oven/furnace combinations allow a wide range of voltage and temperature.
Voltage range: +- 5kV
Temperature range: -150 to 700 °C
Current range: 1 pA – 1mA
LatinAm. Metal. Mat. 2016; 36 (1) J. Electron. Mater. 2016; 45 (8) Thermally Stimulated Discharge Current Analysis of Polymers, Carr, S. H., (1982)