2018 Volume 59 Issue 9 Pages 1506-1512
The optical and electrical properties of MnTe films were investigated to ascertain the feasibility of their use in solar cell applications. Three α-MnTe thin films with different composition, i.e., Mn-47.9 at% Te, Mn-49.2 at% Te, and Mn-50.4 at% Te, were prepared using RF magnetron sputtering. All the films demonstrated a high light absorption coefficient (0.2 × 105–0.8 × 106 cm−1) and an optimal indirect band gap (1.37–1.52 eV) for solar cell applications. Furthermore, all of them exhibited p-type conductivity, with the Mn-47.9 at% Te film demonstrating three to four times higher carrier mobility (5.2 cm2·V−1·s−1) than the Mn-50.4 at% Te film (1.6 cm2·V−1·s−1).