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Natural photosensitizers for dye sensitized solar cells

Al-Bat’hi1, Souad A. M. and Sopyan, Iis and Alaei, Iraj (2013) Natural photosensitizers for dye sensitized solar cells. In: European conference and workshop on Renewable Energy Systems (EWRES), 17-28 September 2012, Alanya / Antalya, Turkey.

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Dye-sensitized solar cells (DSSCs) were constructed by using the Lawsonia inermis leaves, Sumac/Rhus fruits, and Curcuma longa roots as natural sensitizers of anatase-based nanostructure TiO2 thin film Paint-coated on ITO conducting glass. The orange-red Lawsone, red purple anthocyanin and yellow Curcumin are the main components in the natural dyes obtained from these natural products. A blend of 50 wt% chitosan and 50 wt% polyethylene oxide (PEO) was used as a solid state thin film electrolyte. The polymer blend was complexed with ammonium iodide (NH4I) and some iodine crystals were added to the polymer–NH4I solution to provide I-/I3- redox couple. The ionic conductivity of the polymer electrolyte is 1.18x10-5 S cm-1 at room temperature. Structural and optical properties of the semiconductor thin films were characterized by X-ray diffractometer and UV-VIS spectrophotometer. The XRD shows nanocrystalline structures for TiO2 thin films (D=13nm). The photovoltaic properties of the cell have been studied and the best overall solar energy conversion efficiency of 1.75% was obtained, under AM 1.5 irradiation, with the red purple Sumac/Rhus extract, that showed a reasonable current density (Jsc = 0.93 mA/cm2).

Item Type: Conference or Workshop Item (Invited Papers)
Uncontrolled Keywords: photosensitizers, DSSCS, solid state electrolyte, photovoltaic;solar energy
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2896 Production of electricity by direct energy conversion
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Dr. Souad Al-Bat'hi
Date Deposited: 12 Jan 2017 17:13
Last Modified: 24 Jan 2017 09:15
URI: http://irep.iium.edu.my/id/eprint/54041

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