A study of DSC using ultrasonic and thermal treatment on nano-crystalline TIO₂ surface

Recently, there were many researches for efficiency improvement of DSC. Among of these works, research of surface treatment is still a prerequisite things for electron diffusion, light-harvesting and surface state of DSC[1]. Using of the surface treatment, it can be raise up porosity of TiO₂ nano-crystalline structure on photo-electrode[2-5]. There are many ways to raise up its porosity such as chemical, physical, electrical and optical methods[7-9]. In this paper, we have designed and manufactured MOPA-PLL type ultrasonic circuit (100W, frequency and duty variable). Manufactured ultrasonic circuit to use to force physical vibration into TiO₂ paste. Then, we have optimized forcing time, frequency and duty of ultrasonic irradiation for surface treatment of DSC photo-electrodes. In I-V characteristic test of DSC, ultrasonic and thermal treated DSC shows 19% improved its efficiency comparing with established DSC.