Influence of SiO2/TiO2 Nanocomposite on the Optoelectronic Properties of PFO/MEH-PPV-Based OLED Devices
Al-Asbahi, Bandar . 2018
The influence of SiO2/TiO2 nanocomposites on the performance of organic light-emitting
diodes (OLEDs) based on poly(9,90-di-n-octylfluorenyl-2,7-diyl) (PFO) and various amounts of
poly(2-methoxy-5-(2-ethyl-hexyloxy)-1,4-phenylene-vinylene) (MEH-PPV) was investigated. Prior to
the fabrication of the OLEDs on indium-tin oxide (ITO) substrates, the hybrids of PFO/MEH-PPV,
in the presence and absence of the SiO2/TiO2 nanocomposites, were prepared via the solution
blending technique. Improvement of the performances of the devices in the presence of the SiO2/TiO2
nanocomposites was detected. The existence of the SiO2/TiO2 nanocomposites led to better
charge carrier injection and, thus, a significant reduction in the turn-on voltage of the devices.
The enhancement of MEH-PPV electroluminescence peaks in the hybrids in the presence of
SiO2/TiO2 nanocomposites is not only a result of the Förster resonance energy transfer, but also of
hole-electron recombination, which is of greater significance. Moreover, the existence of the SiO2/TiO2
nanocomposites led to a shift of the CIE chromaticity coordinates of the devices.
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