Efficiency enhancement in blue organic light emitting diodes with a composite hole transport layer based on poly(ethylenedioxythiophene):poly(styrenesulfonate) doped with TiO2 nanoparticles

Effect of Humidity on the Electrical Properties of Poly (3, 4‐Ethylenedioxythiophene) – Poly (Styrenesulfonate) and its Carbon Nanotube Composites

“…Further, flexible thin films of conducting polymers can be easily deposited by various techniques, such as spin‐coating, dip coating, electrochemical deposition and polymerization. Thereafter, conducting polymers have widely been used in various device applications such as organic light emitting diode, [3–5] organic field effect transistors, [6,7] organic memory devices, [8,9] photovoltaic applications, [9–11] sensors, [12–18] etc.…”

“…Generally, the polymer electrolytes used in humidity sensors perform well at low humidity range, however, on exposure to high humidity these materials do not exhibit reversible change in their electrical properties and hence are not reusable [25,26] . Among the variety of conducting polymers poly (3, 4‐ethylenedioxythiophene) – poly (styrenesulfonate) (PEDOT : PSS) is well ‐known for its remarkable humidity sensing property apart from other vast applications in fabrication of a variety of optoelectronic and memory devices [3–5,8–11] . Recently it has been reported that PEDOT : PSS show high sensitivity and reversibility in electrical properties when exposed to humid environment and that the substantial change in the electrical properties of PEDOT : PSS films with slight change in humidity can be easily monitored [27,28] .…”

Solution-Processed Hybrid Light-Emitting Devices Comprising TiO 2 Nanorods and WO 3 Layers as Carrier-Transporting Layers

“…By changing the morphology of TiO 2 , it is expected that the optical and/or electrical transporting properties of TiO 2 are also modified. In fact, nanostructured TiO 2 have been applied in many areas, such as ultraviolet photodetectors [12], OLEDs [13], organic solar cells [14], and photocatalytic water-splitting technology [15]. Morii et al reported encapsulation-free hybrid organic/inorganic light-emitting diodes with the configuration of fluorinedoped tin oxide (FTO)/TiO 2 /F8BT/MoO 3 /Au [16], using TiO 2 as an electron injection layer (EIL) and MoO 3 as a hole injection layer (HIL).…”

Solution-Processed Hybrid Light-Emitting Devices Comprising TiO2 Nanorods and WO3 Layers as Carrier-Transporting Layers

“…By changing the morphology of TiO 2 , it is expected that the optical and/or electrical transporting properties of TiO 2 are also modified. In fact, nanostructured TiO 2 have been applied in many areas, such as ultraviolet photodetectors [12], OLEDs [13], organic solar cells [14], and photocatalytic water-splitting technology [15]. Morii et al reported encapsulation-free hybrid organic/inorganic light-emitting diodes with the configuration of fluorine-doped tin oxide (FTO)/TiO 2 /F8BT/MoO 3 /Au [16], using TiO 2 as an electron injection layer (EIL) and MoO 3 as a hole injection layer (HIL).…”