8-10 June 2016
Asia/Bangkok timezone

Synthesis of Natural Dye Sensitizer Local for Dye-sensitized Solar Cell (DSSC) Application

Not scheduled
15m
Poster presentation Material Physics, Nanoscale Physics and Nanotechnology

Speaker

Wijit Choawunklang

Description

The DSSC has been the attractive for third generation of photovoltaic. Natural dyes were synthesized from the Turmeric, the saman bark, Bai-ya-nang, the Butterfly pea and Black rice, respectively. Molecules of natural dye were distilled from ethanol, butanol and acetonitite which are solvent. The concentration of natural dye were fixed by ratio of weight of natural dye powder: solvent volume (1 g:10 ml). Characteristic color and light absorption of natural dye were analyzed by digital camera and UV-vis spectroscopy (wavelength of 290 – 1100 nm). The complete cell was fabricated from the molecule of dye insert in porous TiO2 working electrode (P25), electrolyte (iodide/tri-iodie liquid) and platinum (Pt) counter electrode, respectively. The photon light conversion to photocurrent was measured by solar simulator (under light intensity of 100 mW/cm2, AM 1.5). Results, the characteristic color of natural dye show yellow, brown, green, light green and opaque white for the turmeric, saman bark, Bai-ya-nang, butterfly pea and black rice, respectively. Light absorption of Bai-ya-nang and the turmeric sensitizer can be seen higher than the saman bark, the Butterfly pea and Black rice, respectively for wavelengths of 500 – 700 nm. However, the maximum cell efficiency of 0.2% was achieved from the turmeric dye due to adhesion of turmeric dye with porous TiO2 occurred several more than other natural dye. Although, absorption spectra of Bai-ya-nang dye obtains the highest but molecule cannot adhered with porous TiO2. Our results show that this simple preparation of the natural dye local cab be applied as a dye sensitizer for DSSC.

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