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Bis[2-(2-hydroxyphenyl)-pyridine] beryllium, known as Bepp2, belonging to the beryllium complex family, is a blue fluorescence emitter with excellent charge transport ability. Due to its high electron mobility and high triplet energy level, Bepp2 has been used as an electron-transporting and hole/exciton-blocking layer material in OLEDs. High-efficiency blue OLEDs by using Bepp2 as the emitting layer material and high efficiency white OLEDs using Bepp2 as host material have been achieved [1-8].
Bepp2 can be also used as host material to fabricate orange, green, red EL devices.
General Information
| CAS number | 220694-90-6 |
|---|---|
| Chemical formula | C22H16BeN2O2 |
| Molecular weight | 349.39 g/mol |
| Absorption | λmax 329 nm, 361 nm (chloroform) |
| Fluorescence | λem 440 nm (chlorofom); 450 nm (film) |
| HOMO/LUMO | HOMO = 5.7 eV, LUMO = 2.6 eV [1] |
| Synonyms |
|
| Classification / Family | Blue emitter, Fluorescence host materials, Electron-transport layer (ETL), Hole-blocking layer (HBL), Sublimed materials |
* Measurable with an optical spectrometer
Product Details
| Purity | Sublimed* > 99% |
|---|---|
| Melting point |
TGA 365 °C (5% weight loss) DSC 314 °C (onset) |
| Color | Light yellow powder/crystals |
* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials.