Electrical properties of two-source evaporated polycrystalline films

Abstract

The compositional dependence of electrical properties such as thermoelectric power, carrier concentration and conductivity, of two-source vacuum evaporated Cd 1−x Zn x Te polycrystalline thin films (0 ≤ x ≤ 1) were investigated. The temperature dependence of conductivity was studied in the range 100-400 K and the films were found to exhibit two activation energies. Analysis of the activation energy in the low-temperature region led to the conclusion that the electrical conduction might be due to charge carriers in fully ionized trap states of the partially depleted grains, while the conduction in the high-temperature region might be due to thermionic emission of charge carriers from grains.

Optimization of structural, optical and electrical properties of CdZnTe thin films with the application of thermal treatment

“…The electrical conductivity is observed to increase with annealing which may be due to change in carrier concentration, mobility and recrystallization of grains during thermal annealing process. The results are consistent with the earlier reported work [4,18].…”

The synthesis of CdZnTe semiconductor thin films for tandem solar cells

“…A variety of techniques have been adopted to grow II–VI compound semiconductor thin films, like e-beam evaporation, 1 high vacuum thermal evaporation, 2,3 molecular beam epitaxy, MBE, 4 electro-deposition, 5 spray pyrolysis and solution growth, 6,7 chemical vapor deposition 8 and close spaced sublimation. 10–16 …”