Invited PaperStudy on blue organic light-emitting diodes doped with 4,4’‐bis (9‐ethyl‐3carbazovinylene)‐1,1’‐biphenyl in various host materials

Add time:09/26/2019    Source:sciencedirect.com

We have fabricated efficient blue organic light-emitting devices (OLEDs) with 4,4′-bis (9-ethyl-3carbazovinylene)-1,1′-biphenyl(BCzVBi) as the fluorescent emitter doped into 4,4′-bis(carbazol-9-yl)biphenyl(CBP) and 1,3,5-Tris(1-phenyl-1H-benzimidazol-2-yl)benzene (TPBi), respectively, and the results show that luminance and luminous efficiency are greatly enhanced in the doped devices. Particularly, the optimized blue CBP-host device with a well-designed structure has a significantly higher luminous efficiency of 4.45 cd/A. The energy level structure of the BCzVBi molecules is obtained, which yields useful information on the light emission processes. We carry out a spectroscopic analysis based on Gaussian multi-peak fit for the electroluminescence (EL) emission spectra and present a theoretical explanation of the energy transfer mechanism in the host–guest system. These are expected to provide an effective strategy in enhancing high-efficiency blue OLEDs.

We also recommend Trading Suppliers and Manufacturers of (E)-4,4'-ethylenebis(1,1'-biphenyl) (cas 1657-71-2). Pls Click Website Link as below: cas 1657-71-2 suppliers

Prev:Selective arylation of 1,1-disubstituted olefins using a biphenyl-based phosphine in Heck coupling reactions
Next:Density functional theory molecular modeling and antimicrobial behaviour of selected 1,2,3,4,5,6,7,8-OCTAHYDROACRIDINE (cas 1658-08-8)-N(10)-oxides)