Optimal series-parallel connection method of dye-sensitized solar cell for Pt thin film deposition using a radio frequency sputter system

• Published in: Thin solid films 2008-11, Vol.517 (2), p.963-966
• Main Authors: Choi, Jin-Young, Hong, Ji-Tae, Seo, Hyunwoong, Kim, Mijeong, Son, Min-Kyu, Lee, Kyoung-Jun, Lee, Dong-Yoon, Kim, Hee-Je
• Format: Article
• Language: English
• Subjects: Applied sciences; Catalysis; Catalysts: preparations and properties; Chemistry; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Dye-sensitized solar cell; Electron and ion emission by liquids and solids; impact phenomena; Energy; Exact sciences and technology; Field emission, ionization, evaporation, and desorption; General and physical chemistry; Natural energy; Photovoltaic conversion; Physics; Platinum counter electrode; Radio frequency sputtering; Series-parallel connection; Solar cells. Photoelectrochemical cells; Solar energy; Structure and morphology; thickness; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Thin film structure and morphology
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2008.08.159

The counter electrode widely used in DSC (Dye-sensitized solar cells) is constructed of a conducting glass substrate coated with a Pt film, in which the platinum acts as a catalyst. The characteristics of the platinum electrode depend strongly on the fabrication process and the electrode's surface condition. In this study, Pt counter electrodes were deposited by radio frequency (RF) sputtering with 6.7 × 10 − 1  Pa Ar, RF power of 120 W and substrate temperature of 100 °C. The surface morphology of Pt electrodes was investigated using field emission scanning electron microscopy and atomic force microscopy. Comparison of samples prepared by RF sputtering and RF magnetron sputtering showed that the surface of the RF sputter deposited electrode had a larger surface area resulting in more effective catalytic characteristics. Finally, an open voltage of 4.8 V, a short circuit current of 569 mA and a photoelectric conversion efficiency of approximately 3.6% were achieved for cells composed of 30 DSC units of 6 cm × 4 cm DSC units with 6 cells in series and 5 cells in parallel.