First Principles Investigations of Electronic, Photoluminescence and Charge Transfer Properties of the Naphtho(2,1-b:6,5-b')difuran and Its Derivatives for OFET (Prinsip Pertama Kajian Elektronik, Fotopendarkilau dan Ciri Pemindahan Cas Nafto (2,1-b :6,5-b ') difuran dan Terbitannya untuk OFET)