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SUMMARY:Deep Blue Organic TADF Emitters for Electroluminescent Devices - P
 rof Eli Zysman-Colman (University of St Andrews)
DTSTART:20190226T143000Z
DTEND:20190226T153000Z
UID:TALK120742@talks.cam.ac.uk
CONTACT:Emrys Evans
DESCRIPTION:The first generation OLEDs were based on organic fluorescent e
 mitters. Their efficiency was intrinsically capped at 25% due to only bein
 g able to recruit singlet excitons. The second generation OLEDs have emplo
 yed organometallic phosphorescent emitters\, which harvest both singlet an
 d triplet excitons for emission due to the enhanced intersystem crossing m
 ediated by the heavy metals such as iridium(III) and platinum(II). These m
 etal complexes possess very desirable optoelectronic properties and lead t
 o very efficient OLED devices.  However\, the rarity of these metals\, the
 ir high cost and their toxicity are important detracting features that inh
 ibit large-scale\, worldwide adoption of OLED technology\, particularly fo
 r lighting where\, unlike displays\, low cost devices are crucial to marke
 t growth. The third generation OLEDs are based on small organic compounds 
 that emit via a thermally activated delayed fluorescence (TADF) mechanism.
   As with phosphorescent emitters\, OLEDs using these emitters can recruit
  100% of the excitons.  In this presentation\, we present our recent effor
 ts towards blue emitter in electroluminescent devices.
LOCATION:Rayleigh Seminar Room\, Maxwell Centre\, Cavendish Laboratory
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