Comparative Study of Thermoelectric Behavior in NiO Thin Films Deposited at Varying Pressures
摘要
Nickel oxide and aluminum-doped zinc oxide thin films were successfully deposited using pulsed laser deposition. Two nickel oxide thin films were grown at deposition pressure of 10 mTorr (≈ 1.33 Pa) and 20 mTorr (≈ 2.66 Pa). The prepared NiO thin film was successfully characterized using x-ray diffraction, ultraviolet (UV) spectroscopy, and Hall measurement techniques. The thermoelectric measurements were carried out using an in-house-developed thermoelectric setup. The Seebeck coefficient values for the nickel oxide thin films prepared at 20 mTorr and 10 mTorr were found to be nearly the same, at approximately 0.018 mV/K. The power factors at 20 mTorr and 10 mTorr for the nickel oxide thin films were estimated to be 0.00008424 mW cm−1 K−2 and 0.0000312 mW cm−1 K−2, and the figure of merit was estimated as 0.125 and 0.046, respectively.
Graphical abstract