Discover, Connect & Collaborate at TECHINNOVATION 2021
Organic Molecular Materials For Optoelectronic Devices
The employment of thermally activated delayed fluorescence (TADF) in the active layers of organic light emitting diodes (OLEDs) has opened wide possibilities in the search for new efficient OLED materials. The external quantum efficiency (EQE) of OLEDs based on organic small molecules are improving steadily in recent years. However, the demand of flexible molecular design, good morphological and electrochemical stabilities and well-controlled photophysical characteristics of organic emissive compounds remains relevant. Despite significant research efforts devoted to find easily synthesized and efficient organic materials, molecular design still consists of complex synthesis pathways that are technologically complicated to implement. The synthesis process is usually lengthy, multi-step, time-consuming and expensive.
This technology offer is a bipolar organic light-emitting compound containing benzanthrone according to general formula (I). The purpose of this technology is to provide new emissive organic compounds, which have novel acceptor unit benzanthrone in their structure. This technology offer enables new emissive materials with effective emission properties and with suitable energy levels.
Technology Features, Specifications and Advantages
This technology offer is a bipolar organic light-emitting compound containing benzanthrone according to general formula (I). It has been proven that the compounds of the formula (I) are of potential properties for use in optoelectronic components, precisely as emitter, host, sensing, imaging material or other various optical probes depending on further embodiments of the benzanthrone-based compounds of general formula (I). The compounds of the formula (I) are prominent for their hole and electron transport and long-lived emission in infrared region. Long-lived infrared emission of the compounds of the formula (I) result from reverse intersystem crossing between excited triplet energy levels to the excited singlet energy levels. This process can induce the energy conversion in electroluminescent devices theoretically up to 100 %. Long-lived infrared emission of the benzanthrone-based compounds of the formula (I) may be sensitive to external stimulus making them suitable for optical sensor applications. The benzanthrone-based compounds of the formula (I) with high charge mobilities and absorption covering optical and/or near infrared regions may be used for diode-based and/or transistor-based photodetectors or organic or hybrid solar cells.
This technology offer relates to organic bipolar light-emitting compounds of the general formula (I) based on benzanthrone moiety. It relates to organic bipolar light-emitting benzanthrone-based compounds for optoelectronic devices, organic light-emitting diodes (OLED), light-emitting field-effect transistors (FET), light-emitting vertical transistors (VOLET), optical sensors, memory devices, data storage devices, external stress responsive probes, bio- surface-imaging probes, etc.
- The proposed organic compounds are obtained from commercial reagents by a simple one-step synthesis method.
- The present technology offer provides novel radiant materials that have efficient emission properties and adequate energy levels.
- These are new organic materials with high luminescence quantum efficiency values, well-matched energy levels, and good film-forming properties. The use of these materials in the active emission layer of organic light emitting diodes makes it possible to obtain efficient devices.