Effect of Natural Dye on the Spectral Response

Abstract

Zinc oxide and dye are utilized to absorb and convert incident photons to electric energy using a sandwich construction with an active area of 1.5 x 1.5 cm2, which improves the photodetector's performance as a light sensor. A variable of solution concentration according to the ratio of mass and volume was used to extract natural dye from Barago officinalis .The Barago officinalis absorbance was investigated by spectrophotometer at a wavelength of 200-1000 nm .this indicates that UV absorption has occurred ,and notice when an increasing in the spectral response at concentration of 0.1ml, appear an improvement in the infrared region with a wave length of 950 nm the enhanced sensitivity in the long wavelength region due to formation of dyes aggregates within the devices. which led to the highest value of qualitative detection up to 6.2x 1012W-1 cm. Hz 1/2 thus increasing quantum efficiency to (56.7%) at the wavelength (950nm).