Volume : 2, Issue : 2, JAN 2018

OPTOELECTRONIC AND STRUCTURAL EFFECT OF NANO-PARTICLES ON CERIUM TITANIUM TRIOXIDE THICK FILMS

Cliff Orori Mosiori, Duke Ateyh Oeba

Abstract

Light sensing forms a basis of fabricating solar cells which in turn promise to avail clean and sustainable electrical suitable to make worthwhile contributions to solving global renewable-energy challenges. Current solar cell technology heavily relies on crystalline silicon wafers.Due to its challenges, great research interest is now directed towards thin-film solar cells. An attempt on organic semiconductors materials has presented much poorer charge transports and shorter exciton diffusion lengths than inorganic ones do. These has greatly limit the thickness of the photoactive layer in case of organic materials. Theoretically, materials with high electrical conductivity such as metal nanoparticles are opaque. They also offer lower optical transparency. Therefore, finding materials that are both transparent to visible light and electrically conductive is a continues study so that today’s popular devices such as liquid-crystal displays and organic light-emitting diodes in televisions, touch screens in phones or tablet computers, electrophoretic displays in e-readers, or solar cells are visible.in this work, silver nanoparticles were used to dope cerium titanium dioxide by using a laser source at low pressure oxygen atmosphere irradiations. It was found that this proceedure generated CexAg0.02xTiO2 composite when pure cerium oxide, silver metal and titanium dioxide composites were used. The resulting thin films were found to possess higher absorption coefficients in the UV-visible spectral region accompanied with a tunable optical band gap varying between 3.42 eV to 3.78 eV. It was proposed to be suitable for wind band gap optical applications like in lasers design and applications.

Keywords

CeTiO2, Composite, CexAg0.02xTiO2 thin films, laser radiation

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