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Bridging the Efficiency Gap: Fully Bridged Dinuclear Cu(I)‐Complexes for Singlet Harvesting in High‐Efficiency OLEDs
Author(s) -
Volz Daniel,
Chen Ying,
Wallesch Manuela,
Liu Rui,
Fléchon Charlotte,
Zink Daniel M.,
Friedrichs Jana,
Flügge Harald,
Steininger Ralph,
Göttlicher Jörg,
Heske Clemens,
Weinhardt Lothar,
Bräse Stefan,
So Franky,
Baumann Thomas
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201405897
Subject(s) - oled , materials science , iridium , quantum yield , quantum efficiency , bridging (networking) , optoelectronics , diode , yield (engineering) , platinum , singlet state , photochemistry , nanotechnology , optics , fluorescence , catalysis , atomic physics , organic chemistry , chemistry , computer network , physics , layer (electronics) , computer science , metallurgy , excited state
The substitution of rare metals such as iridium and platinum in light‐emitting materials is a key step to enable low‐cost mass‐production of organic light‐emitting diodes (OLEDs). Here, it is demonstrated that using a solution‐processed, fully bridged dinuclear Cu(I)‐complex can yield very high efficiencies. An optimized device gives a maximum external quantum efficiency of 23 ± 1% (73 ± 2 cd A −1 ).