Optical properties of natural dyes: prospect of application in dye sensitized solar cells (DSSCs) and organic light emitting diodes (OLEDs)
Journal Title: Food Research - Year 2018, Vol 2, Issue 5
Abstract
Optical properties (absorbance, fluorescence, and transmittance) of the natural dyes extracted from flower, leaf, bark and rhizome of some plant species available in Nepal have been explored, with the prospect of application in dye-sensitized solar cells (DSSCs) and organic light emitting diode (OLED) employing UV-Vis., Fluorescence and FTIR Spectroscopy. The extraction process was carried out using solvents with a varying polarity index of ca. 0 to 10: cyclohexane (CH), dichloromethane (DCM), acetone, ethanol (EtOH), methanol (MeOH) and double distilled water (DDW). The absorbance was found to depend on the nature of solvent used; the dye samples, A. vasica Nees (in DDW, acetone, DCM and CH), N. arbor-tristis L (in MeOH and CH), U. dioica L (in EtOH, acetone, DCM and cyclohexane), O. wightiana Wall (in acetone and CH), A. vulgaris L (in DCM and cyclohexane), C. coccinea Wall (in DCM), R. anthopogon D.Don (in DCM) and W. fruticosa L (in CH), showed good absorbance in the visible-region and blue shift in the absorbance maxima was noticed with increase of the polarity index of solvents. Some plant extracts showed intense fluorescence emission in the visible region, which hints at their prospect of application in the OLED devices.
Authors and Affiliations
P. N. Paudel, A. Pandey, R. R. Shrestha, P. Lamichhane, R. Adhikari, B. P. Kafle
Keywords
Related Articles
- EP ID EP489519
- DOI 10.26656/fr.2017.2(5),096
- Views 198
- Downloads 0
Effect of autoclaving on the formation of resistant starch from two Nigeria Cassava (Manihot esculenta) varieties
This study evaluated the effect of autoclaving process on the production of resistant starch (RS) from cassava starch. RS was prepared by debranching, autoclaving and storage of cassava starch from two Nigeria varieties...
Effect of adjunct inoculation of Lactobacillus plantarum BS and Pediococcus acidilactici 3G3 on the microbiological, physicochemical and sensory properties of fermented carabeef (pindang damulag)
Lactobacillus plantarum BS and Pediococcus acidilactici 3G3 were inoculated singly or jointly on carabeef (pindang damulag) and allowed to ferment at 10 and 32°C for five days, in comparison with uninoculated naturally f...
Microwave irradiated coconut shell-activated carbon for decolourisation of palm oil mill effluent (POME)
The study was based on the adsorption principle of colour removal from POME using natural bio-sorbents Coconut Shell activated carbon (CS-AC) pre-treated by microwave irradiation. The effect of operating parameters such...
Citrinin and color analysis of angkak collected from several regions in Indonesia
Angkak, a fermentation product of rice by Monascus sp., is used for natural food coloring, spices, and medicine by Indonesian people who believe in its pharmacological properties. However, Monascus sp. also produces a se...
Sensory evaluation of ice cream with hydrosoluble soy extract
Ice cream is a nutritious food because it contains ingredients responsible for supplying energy to the body. Soy has a high nutritional value and functional properties which make it to be an alternative ingredient to rep...