The fifth talk was given by Dr. Dler A. Jameel from Zakho university. The title of his talk was: Nanotechnology and enhancement of Solar Efficiency and the Electrical Properties of Conducting Polymers. As it is known the solar cells are considered as one of the key technologies towards the available and sustainable energy resource. Also, solar cell has demonstrated a promising impact in delivering clean energy worldwide.  Dr. Dler talked about their investigation on the effect of thickness of polymer (Sulfonated polyaniline) and the type of substrate orientations (Gallium arsenide) on the proposed solar cell efficiency.