Effects of Taiwan Roselle anthocyanin treatment and single-walled carbon nanotube addition on the performance of dye-sensitized solar cells

2014 International Conference on Science & Engineering in Mathematics, Chemistry and Physics

数学;化学;物理学

Chou, C.S.^1 ; Tsai, P.J.^2 ; Wu, P.^3 ; Shu, G.G.^4 ; Huang, Y.H.^1 ; Chen, Y.S.^1

Department of Mechanical Engineering, National Pingtung University of Science and Technology, Pingtung 912, Taiwan^1

Department of Food Science, National Pingtung University of Science and Technology, Pingtung 912, Taiwan^2

Engineering Product Development, Singapore University of Technology and Design, 20 Dover Drive, 138682 Singapore, Singapore^3

Nuclear Materials Joint Lab, Tsinghua University Graduate School, Tsinghua University City Park (518055), Shenzhen, China^4

关键词: Fabrication process;    Natural Sensitizer;    Performance improvements;    Power conversion efficiencies;    Roselle;    Singlewalled carbon nanotube (SWCNT);    Soaking temperature;    Systematic experiment;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/495/1/012020/pdf
DOI  :  10.1088/1742-6596/495/1/012020

来源: IOP

【 摘 要 】

This study investigates the relationship between the performance of a dye-sensitized solar cell (DSSC) sensitized by a natural sensitizer of Taiwan Roselle anthocyanin (TRA) and fabrication process conditions of the DSSC. A set of systematic experiments has been carried out at various soaking temperatures, soaking periods, sensitizer concentrations, pH values, and additions of single-walled carbon nanotube (SWCNT). An absorption peak (520 nm) is found for TRA, and it is close to that of the N719 dye (518 nm). At a fixed concentration of TRA and a fixed soaking period, a lower pH of the extract or a lower soaking temperature is found favorable to the formation of pigment cations, which leads to an enhanced power conversion efficiency (η) of DSSC. For instance, by applying 17.53 mg/100ml TRA at 30 for 10 h, as the pH of the extract decreases to 2.00 from 2.33 (the original pH of TRA), the η of DSSC with TiO2+SWCNT electrode increases to 0.67% from 0.11% of a traditional DSSC with TiO2electrode. This performance improvement can be explained by the combined effect of the pH of sensitizer and the additions of SWCNT, a first investigation in DSSC using the natural sensitizer with SWCNT.