High-efficiency of the devices of dye-sensitised solar cells from extracting three woods as a photosensitiser Achmad Nasyori1,3*, Iswadi Ibrahim Panturengi1, Ihsan1, and Fatimah Arofiati Noor2*
KOC University
Abstract
Dye-sensitised Solar Cells (DSSCs) are noticed as a tremendously promising technology of solar cells, thanks to their low cost of fabrications, simple manufactures, and ecofriendly technologies. Although the investigation of DSSCs is impressive, the performance of DSSCs based on natural or organic dyes as photosensitizer lags far behind of synthetic dye like ruthenium II complexes and Ru (acac)3 (ruthenium (III) acetylacetonate. Herein, we introduced a highly promising natural dye from three woods (Cinnamomun verum, Caesalpinia sappan L, and Tectona grandis) dominated by anthocyanin pigments as a photosensitizer with recording a high efficiency more that 3% which is unprecedented in the natural dye history. Based on the result of UV-Vis spectra, three woods turned up at 600^s nm, this indicates that the visible range is dominating. Furthermore, the photovoltaics measurement reveals the highest conversion efficiency is 3.7% from the wood of Caesalpinia sappan L by showing 1.399 mA cm-2 (JSC) and 0.528 V (VOC). This is an excellent yield because of so far, the conversion efficiency of DSSCs based on natural dye is less 1 %. Our findings indicates that three-wood extract as photosensitiser is strongly potential and even can rival with synthetic dye.
