[Show abstract][Hide abstract] ABSTRACT: This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: h i g h l i g h t s " The efficiency of Kerria japonica and Rosa chinensis dye is 0.22%, 0.29% respectively. " In the presence of sugar molecule, it was increased to 0.29% for K. japonica and decreased to 0.27% for R. chinensis. " Implementation of natural dye in DSSC is cost effective compared to the metal based dyes. g r a p h i c a l a b s t r a c t a r t i c l e i n f o a b s t r a c t The natural dyes carotenoid and anthocyanin were extracted from Kerria japonica and Rosa chinensis, respectively, using a simple extraction technique without any further purification. They were then used as sensitizers in dye-sensitized solar cells (DSSCs), and their characteristics were studied. The ranges of short-circuit current (J SC) from 0.559 to 0.801 (mA/cm 2), open-circuit voltage (V OC) from 0.537 to 0.584 V, and fill factor from 0.676 to 0.705 were obtained for the DSSCs made using the extracted dyes. Sugar mol-ecules were added externally to the dye for stabilization and to increase the conversion efficiency. The efficiencies of the K. japonica and R. chinensis dyes were 0.22% and 0.29%, respectively; after the addition of sugar, the efficiency increased to 0.29% for K. japonica and decreased to 0.27% for R. chinensis. Thus, the addition of sugar molecules increased the conversion efficiency slightly with the carotenoid dye of K. japonica, while there was no considerable change with the anthocyanin of R. chinensis. This paper briefly discusses the simple extraction technique of these natural dyes and their performance in DSSCs. Ó 2012 Elsevier B.V. All rights reserved.
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 06/2012; 96:305-309. · 1.98 Impact Factor