Photophysically Innocent Boron Cluster Ligand Scaffolds For Organic Light Emitting Diode Materials
Blue emission is achieved with a fluoride-free framework 1,1’-bis-o-carborane (bc) boron derivative:Boron cluster ligand scaffoldLight emitting propertiesBlue wavelength (maximum emission at 463 nm)Decreased degradationIncreases OLED efficiency and lifetimeIncreased Blue OLED efficiencyBulky Pt(II) platformStrong ligand fieldLarge band gap for blue emissionIncreased transition state stability yielding greater color purity and rangeThis innovation decreases undesired Pt···Pt interactions yielding more Pt available in bulk
OLEDSolid state applicationsLuminescent materialsTV ScreensCell Phone ScreensElectronic devices with displaysCar screensGPSGaming consolesMonitorsLightingCar tail lights and interior lighting
Synthesis and characterization of a new complex that uses a carborane 1,1’-bis-o-carborane (bc) boron derivativeUsing bc in place of the commonly used biphenyl layer in OLED applicationsReduce Pt···Pt interaction and aggregationCan increase bulk and more stable and tunable transition phase stability
Background An organic light- emitting diode (OLED) is aLED in which the emissive electroluminescent layer is a film of organic compound that emits light in response to an electric current. OLEDs have shortened lifetimes due to reasons such as ligand aggregation and lack of steric bulk. blue OLEDs have short lifetimes vs red and green partly because the higher energy blue light makes it difficult to design stable deep-blue emitters. Intermolecular aggregation and a lack of steric bulk are fundamental issues that must be addressed with the Pt(II) phosphorescent emitters. Tech ID/UC Case 26035/2016-573-0 Related Cases 2016-573-0
This innovation is the synthesis and characterization of a new complex that reduces these undesired intermolecular (Pt···Pt) interactions. Blue emission is achieved with a fluoride-free framework. No technology exists that uses Boron Clusters with 1,1’-bis-o-carborane (bc) in OLED and photoemission applications. By decreasing the undesired interactions the result is for increased bulk and more stable and tunable transition phase stability.
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