Papers by Author: Hui Wen Liu

Abstract: Recently, dye-sensitized solar cell has become one of the hottest studies of solar cell due to it's higher efficiency on photoelectric transformation and lower cost. This article has introduced the preparation methods of dye-sensitized solar cell and other factors that can influence it's function, which has described the way of improving the performance of film electrode and increasing the efficiency on photoelectric transformation.

Abstract: Abstract. Using the radio frequency reactive magnetron sputtering technique, ZnO and Al-dopped ZnO thin films were fabricated on glass substrate by changing the Ar/O₂ ratio and substrate temperature. The film crystallinity、optical properties and surface morphology were investigated by X-ray diffraction、 UV - visible spectrophotometer and scanning electron microscopy (SEM). The XRD results showed that by changing the argon oxygen ratio, Al-dopped ZnO films deposited at sputtering power of 40W and room temperature for 1 hour sputtering time showed no significant peaks, suggesting that the film growth was amorphous. UV-Vis spectrophotometer at 400nm wavelength test showed less than 90% light transmission rate. When substrate temperature was increased to 200 ° C, significant (002) diffraction peak and transmittance of 88% or more in the 400 ~ 800nm wavelength range appeared. A minimum XRD diffraction peak FWHM was found at substrate temperature of 300 ° C. TEM showed well crystal growth with maximum grain size at 300 ° C, XRD showed that there are only (101) peaks ,no (002) peaks in Al- doped ZnO.

Abstract: To response the call of “constructing an economical society” and saving electricity consumption of public places, this paper designs an automatic control system of lumination in public places based on time, lighting intensity and personal distribution etc. It’s in low price that it is equivalent to a manual switch. Moreover, it’s low energy consumption, with steady performance, convenient installation without changing original line.