Photoelectrochemical solar cell using extract of Eugenia jambolana Lam as a natural sensitizer

Abstract

The extract of Jambol o (java plum), Eugenia jambolana Lam, was used as a natural sensitizer of a wide band-gap semiconductor (TiO2) in photoelectrochemical solar cells. The natural dye, adsorbed onto the semiconductor surface, absorbs visible light and promotes electron transfer across the dye/semiconductor interface. Photogenerated current and voltage as high as 2.3 mA and 711 mV, respectively, were obtained and effective conversion of visible light into electricity was achieved. The use of a natural product as the semiconductor sensitizer enables a faster and simpler production of cheaper and environmentally friendly solar cells.

Influence of the Sol-Gel pH Process and Compact Film on the Efficiency of -Based Dye-Sensitized Solar Cells

“…Photoelectrochemical characterization of DSCs was carried out by current-potential measurements using a PAR 270 galvanostat/potentiostat (EG&G Instruments) system at simulated AM 1.5 solar radiation (100 mW cm −2 ) provided by a solar simulator (Newport/Oriel), as previously described [24,27]. Photocurrent action spectra were obtained by using an Oriel system comprised by a 400 W Xe lamp coupled to a 0.25 m Czerny-Turner monochromator as described earlier [28].…”

XPS characterization of sensitized n-TiO2 thin films for dye-sensitized solar cell applications

“…Absorption spectra were recorded on a 8453 UV-vis spectrophotometer (Hewlett Packard), as previously described [28,29]. The SEM images were obtained in a JSM5500 microscope (JEOL) at 22 kV accelerating voltage.…”

“…1a, were 8 AE 1 and 9 AE 2 mm, respectively, for TiO 2 sol prepared by sol-gel method and directly from Degussa P25. The thickness of films is mainly dependent on the deposition technique [28], which is also responsible for microscopic elevations and irregularities on the surface of films as can be seen in Fig. 1b.…”

In Vivo Effects of Cagaita (Eugenia dysenterica, DC.) Leaf Extracts on Diarrhea Treatment

“…The regional Western Pacific Office of the WHO included diarrhea as a target disease [10]. Currently, screening of biological products and phytochemical extracts has been encouraged to obtain isolated plant biomolecules with antidiarrheal activity, including various plant families such as Liliaceae [11], Rubiaceae [12], Meliaceae [13], Fabaceae [14], Myrtaceae [15], and several others. …”