Papers by Author: Yong Wen Zhang

Abstract: According to the engineering application of vibration stress relief (VSR) based on lateral and torsional coupling, the controlled single-phase series motor is used to create alternating electromagnetic torque, which excites the torsional vibration of the shaft. After adding the expression of the electromagnetic torque to the multi-dof dynamic equation of the lateral and torsional coupling, the dynamic response of lateral and torsional coupling can be calculated. The result has value in the application of VSR based on lateral and torsional coupling.

Abstract: Cu(In_0.8Al_0.2)(SSe)₂ (CIASSe) absorber layers of thin film solar cell were prepared by selenization of Cu(In_0.8Al_0.2)S₂(CIAS) nanocrystals. The CIAS nanocrystals were synthesized by a new solution-based technique and successfully deposited on Mo-coated glass substrates in a one-step process. The phase structure, optical and electrical properties of CIASSe thin films were characterized by power X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectrophotometer and the Hall Effect Measurement system. The results showed that single-phase CIASSe solid solution was successfully obtained for a selenization temperature of above 400oC. And the diffraction peaks shifted to the lower angle with an increase in selenization time and selenization temperature. The films selenized at 500oC were found to be p-type and the resistivity was only 0.9484×10^-4Ω cm. The optical band gap of the films is 1.508eV and the optical absorption coefficient is over 10⁴cm^-1.