원문정보
초록
영어
Dye-sensitized solar cells (DSSCs) were assembled using natural biomass extracted from Gardenia Jasminoide Ellis and Monascus as sensitizers. Different mixtures of natural dyes (i.e., gardenia yellow (GY), gardenia blue (GB), and Monscus (Mo)) extracted from the natural flower of Gardenia Jasminoide Ellis and Monascus were used to produce photosensitivity by interaction between the chemisorption and physisorption of the dyes and the surface of porous TiO2 film. In this study, the adsorption characteristics for harvesting sunlight and the electrochemical behavior of electron transfer using GY, GB, Mo and also a mixture of both dyes were investigated. The light absorption spectrum of the mixed extract contained peaks corresponding to the contributions from both gardenia yellow and gardenia blue extracts. Adsorption and electrochemical properties of three dyes (i.e, Gardenia yellow, Gardenia blue and Monascus) were evaluated using incident photon to current conversion efficiency (IPCE), intensity-modulated photocurrent spectroscopy (IMPS) and intensity-modulated photovoltage spectroscopy (IMVS) from electron harvesting and transport viewpoints.The energy conversion efficiency of the TiO2 electrode with successive adsorptions of GY and GB dye (S-GYB) was 0.59%, which is enhanced compared to the cases of single-dye adsorption.