Synthesis of carboxylated graphene oxide-CdS nanocomposite and its application on photovoltaic devices

چکیده مقاله

Carboxylated graphene oxideCdS nanocomposite (GO-COOH-CdS) was successfully prepared by a facile mixing method in tetrahydrofuran (THF) and used to fabricate photovoltaic devices. The as-prepared nanocomposite was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD analysis further confirmed that CdS nanoparticles have been effectively intercalated into the GO-COOH stacks. The prepared GO-COOH-CdS nanocomposite has been applied for fabrication of hybrid bulk heterojunction photovoltaic devices by using the poly[2-methoxy-5-(2¤-ethylhexyloxy)-1,4-phenylenevinylene] (MEHPPV) as an electron donor in two different weight ratios with GO-COOH-CdS nanocomposite, as an electron acceptor. The effective electron transfer from MEH-PPV to GO-COOH-CdS was confirmed by the significant photoluminescence (PL) quenching of MEH-PPV. According to the obtained results, the photovoltaic devices based on conjugated polymer- GO-COOH-CdS have the potential to open up new production technologies for hybrid bulk heterojunction solar cells based on GOsemiconductor composites.