| Title |
A Study of Photo-electric Efficiency Improvement using Ultrasonic and Thermal Treatment on Photo-electrode of DSC |
| Authors |
김희제(Kim, Hee-Je) ; 김용철(Kim, Yong-Chul) ; 최진영(Choi, Jin-Young) ; 김호성(Kim, Ho-Sung) ; 이동길(Lee, Dong-Gil) ; 홍지태(Hong, Ji-Tae) |
| Keywords |
Dye sensitized solar cell ; Photovoltaic ; Ultra sonic ; Thermal ; Surface treatment |
| Abstract |
A making process of DSC(dye sensitized solar cell) was presented. In general, Photo electrodes of DSC was made by using colloid paste of nano TiO_2 and processing of Doctor-blade printing and high temperature sintering for porous structure. These methods lead to cracks on TiO_2 surface and ununiform of TiO_2 thickness. This phenomenon is one factor that makes low efficiency to cells. After TiO_2 printing on TCO glass, a physical vibration was adapted for reducing ununiform of TiO_2 thickness. And a thermal treatment at low temperature(under 75°C) was adapted for reducing cracks on TiO_2 surface. In this paper, we have designed and manufactured an ultrasonic circuit (100W, frequency and duty variable) and a thermal equipment. Then, we have optimized forcing time, frequency and duty of ultrasonic irradiation and thermal heating for surface treatment of photo-electrode of DSC. In I-V characteristic test of DSC, ultrasonic and thermal treated DSC shows 19% improved its efficiency against monolithic DSC. And it shows stability of light-harvesting from drastically change of light irradiation test. |