The design of multi-functional probe for determining the P-N electrical conductivity type of thermoelectric semiconductors

In this study, a multi-functional probe was designed and implemented to determine P-N electrical conductivity type of thermoelectric (TE) semiconductors according to Hot-Probe method based on the Seebeck effect. The type determination operation is performed according to the positive or negative amplitude of the Seebeck voltage (thermoemf) produced by forming the temperature difference (DT) between the surfaces of the TE semiconductors. Using the developed probe it is possible to provide both necessary heating and measurement of the thermoemf voltage and temperature. As a result of experimental studies; it has been shown that the thermoemf measurements can be made in ± 0.1 mV accuracy in 0-30 mV range and the temperature measurements can be ± 1°C in 0-75°C range. In conclusion, with the developed multifunctional probe, electrical conductivity type of TE semiconductors can be determined as P or N practically, quickly and reliably