Park Kyung-Hee, Kim Tae-Young, Han Shin, Ko Hyun-Seok, Lee Suk-Ho, Song Yong-Min, Kim Jung-Hun, Lee Jae-Wook
Research Institute of Advanced Engineering Technology, Chosun University, Gwangju 501-759, Republic of Korea.
Department of Environmental Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Jul 15;128:868-73. doi: 10.1016/j.saa.2014.03.016. Epub 2014 Mar 24.
Two natural dyes extracted from gardenia yellow (Gardenia jasminoides) and cochineal (Dactylopius coccus) were used as sensitizers in the assembly of dye-sensitized solar cells (DSSCs) to harvest light over a wide range of wavelengths. The adsorption characteristics, electrochemical properties and photovoltaic efficiencies of the natural DSSCs were investigated. The adsorption kinetics data of the dyes were obtained in a small adsorption chamber and fitted with a pseudo-second-order model. The photovoltaic performance of a photo-electrode adsorbed with single-dye (gardenia or cochineal) or the mixture or successive adsorption of the two dyes, was evaluated from current-voltage measurements. The energy conversion efficiency of the TiO2 electrode with the successive adsorption of cochineal and gardenia dyes was 0.48%, which was enhanced compared to single-dye adsorption. Overall, a double layer of the two natural dyes as sensitizers was successfully formulated on the nanoporous TiO2 surface based on the differences in their adsorption affinities of gardenia and cochineal.
从栀子黄（栀子）和胭脂虫（胭脂虫）中提取的两种天然染料被用作染料敏化太阳能电池（DSSC）组装中的敏化剂，以在很宽的波长范围内捕获光。研究了天然染料敏化太阳能电池的吸附特性、电化学性质和光伏效率。染料的吸附动力学数据在一个小吸附室中获得，并采用准二级模型进行拟合。通过电流-电压测量评估了吸附单一染料（栀子或胭脂虫）、两种染料混合物或连续吸附两种染料的光电极的光伏性能。依次吸附胭脂虫和栀子染料的TiO2电极的能量转换效率为0.48%，与单一染料吸附相比有所提高。总体而言，基于栀子和胭脂虫吸附亲和力的差异，成功地在纳米多孔TiO2表面配制了两层天然染料作为敏化剂。
