Study of Nanostructured Polymeric Composites Used for Organic Light Emitting Diodes and Organic Solar Cells

Abstract

Polymeric nanocomposite films from PEDOT and MEH‐PPV embedded with surface modified TiO 2 nanoparticles for the hole transport layer and emission layer were prepared, respectively, for organic emitting diodes (OLEDs). The composite of MEH‐PPV+nc‐TiO 2 was used for organic solar cells (OSCs). The characterization of these nanocomposites and devices showed that electrical ( I ‐ V characteristics) and spectroscopic (photoluminescent) properties of conjugate polymers were enhanced by the incorporation of nc‐TiO 2 in the polymers. The organic light emitting diodes made from the nanocomposite films would exhibit a larger photonic efficiency and a longer lasting life. For the organic solar cells made from MEH‐PPV+nc‐TiO 2 composite, a fill factor reached a value of about 0.34. Under illumination by light with a power density of 50 mW/cm 2 , the photoelectrical conversion efficiency was about 0.15% corresponding to an open circuit voltage V oc = 0.126 V and a shortcut circuit current density J sc = 1.18 mA/cm 2 .