摘要:
This invention relates to organic light emitting diodes (OLEDs) and to methods for their manufacture. The invention provides an OLED element or display which enables contrast to be produced in an image. In accordance with the invention a layer of ink is patterned as a blocking layer between two OLED layers. The ink reduces or prevents conduction, i.e. movement of charge, between the two OLED layers in that area of the device. The ink may be dark in color, e.g. black, to increase the contrast ratio of the OLED. The blocking layer is provided between any two layers in the OLED and blocks the charge movement in these areas. The blocking layer may comprise a multiplicity of ink dots, the density of which determines the extent to which conduction is hindered. The blocking layer may be produced as a “grey-scale” pattern wherein the density of dots is varied across the pattern.
摘要:
A method for forming an organic electronic device, which method comprises the steps of: a) forming a negative image of a desired pattern on a substrate or device layer with a lift-off ink; b) coating a first device layer to be patterned on top of the negative image; c) coating one or more further device layers to be patterned on top of the first device layer to be patterned; and d) removing the lift-off ink and unwanted portions of the device layers above it, thereby leaving the desired pattern of device layers. The method allows the formation of a device structure wherein the device layers to be patterned are self-aligned. The method enables a multiplicity of layers to be patterned in a single set of printing and lift-off steps using one pattern which ensures the excellent vertical alignment of edges, which would be difficult to achieve by direct printing. Horizontal alignment can also be achieved. The size of the device features can be reduced below the actual printing resolution. Examples of organic electronic devices include OFETs, OLEDs, memory, sensing elements, solar cells, photo-sensors, photoreceptors for electrophotography and the like.
摘要:
The invention relates to an improved electronic device, like an organic field emission transistor (OFET), which has a short source to drain channel length and contains an organic semiconducting formulation comprising a semiconducting binder.
摘要:
An organic semiconducting layer formulation containing an organic binder which has a permittivity, ∈, at 1,000 Hz of 3.3 or less and a polyacene compound of Formula A: and processes for the preparation thereof and uses thereof in various electronic devices.
摘要:
An organic semiconducting layer formulation containing an organic binder which has a permittivity, ε, at 1,000 Hz of 3.3 or less and a polyacene compound of Formula A: and processes for the preparation thereof and uses thereof in various electronic devices.
摘要:
The present invention relates to a process for reducing the mobility of an semiconductor (OSC) layer in an electronic device, which has a semiconducting channel area, in specific areas outside said channel area by applying an oxidzing agent to the OSC layer.
摘要:
An organic semiconducting layer formulation containing an organic binder which has a permittivity, ∈, at 1,000 Hz of 3.3 or less and a polyacene compound of Formula A: and processes for the preparation thereof and uses thereof in various electronic devices.
摘要:
A compound of formula 9 and uses thereof in various electronic devices and in a formulation for ink jet printing and in an organic semiconducting layer formulation.
摘要:
A compound of formula 8 and uses thereof in various electronic devices and in a formulation for ink jet printing and in an organic semiconducting layer formulation.
摘要:
A composition for use as an organic semiconducting (OSC) material, the composition comprising: (i) at least one higher molecular weight organic semiconducting compound having a number average molecular weight (Mn) of at least 5000, and (ii) at least one lower molecular weight organic semiconducting compound having a number average molecular weight (Mn) of 1000 or less. Use of the composition in an electronic device, e.g. FET or OLED.