Enhanced Optoelectronic Properties of PFO/Fluorol 7GA Hybrid Light Emitting Diodes via Additions of TiO2 Nanoparticles
, Bandar Ali Al-Asbahi , Mohammad Hafizuddin Haji Jumali and Mohamad Saleh AlSalhi . 2016
The effect of TiO2 nanoparticle (NP) content on the improvement of poly(9,90-di-noctylfluorenyl-
2,7-diyl) (PFO)/Fluorol 7GA organic light emitting diode (OLED) performance is
demonstrated here. The PFO/Fluorol 7GA blend with specific ratios of TiO2 NPs was prepared via
a solution blending method before being spin-coated onto an indium tin oxide (ITO) substrate to
act as an emissive layer in OLEDs. A thin aluminum layer as top electrode was deposited onto the
emissive layer using the electron beam chamber. Improvement electron injection from the cathode
was achieved upon incorporation of TiO2 NPs into the PFO/Fluorol 7GA blend, thus producing
devices with intense luminance and lower turn-on voltage. The ITO/(PFO/Fluorol 7GA/TiO2)/Al
OLED device exhibited maximum electroluminescence intensity and luminance at 25 wt % of TiO2
NPs, while maximum luminance efficiency was achieved with 15 wt % TiO2 NP content. In addition,
this work proved that the performance of the devices was strongly affected by the surface morphology,
which in turn depended on the TiO2 NP content.
The tuning of photophysical properties of the poly[2-methoxy-5-(3,7-dimethyl-octyloxy)-1,4-phenylenevinylene]—end capped with dimethylphenyl (DMP), MDMO-PPV–DMP, was achieved
by…
The effect of TiO2 nanoparticles (NPs) on the energy transfer mechanism from poly(9,9-dioctylfluorene-2,7-diyl) (PFO) to poly(2-methoxy-5(2-ethylhexyl)1,4-phenylenevinylene (MEH-PPV) and to poly 9…
Perovskite quantum dots (PQDs) have emerged as promising competitive materials for optoelectronics and future energy applications. In this work, high-quality PQD thin films