Efficient white organic light-emitting diodes based on an orange iridium phosphorescent complex

A phosphorescent rhenium emitter with minimal fluorescent component induced by heavy atom: Synthetic procedure, molecular structure, photophysical feature and optoelectronic application

“…This value is underdeveloped when compared with those of other superior emitters reported by literatures [18,19].…”

“…The highest efficiency value of 5.6 cd/A is obtained by the 10 wt% doped device under current density of 0.5 mA/cm 2 . Those EL parameters of Re(CO) 3 (BrPO)Br doped devices, however, are not satisfactory enough compared with literature values based on superior emitters [19][20][21]. It is expected that although the fluorescent LLCT has been transferred into phosphorescent one, the long excited state lifetime of Re(CO) 3 (-BrPO)Br greatly limits its EL performance by suffering serious efficiency roll-off.…”

Spectral characterizations and photophysical properties of one-step synthesized blue fluorescent 4′-aryl substituted 2,2′:6′,2′′-terpyridine for OLEDs application

“…Additionally, P. Chen et al have demonstrated remarkably high efficient WOLEDs that are fabricated by mixing the blue fluorescence and orange phosphorescence compounds [21]. However, the blue emission OLED is still dimmer than that of green and red emitting OLEDs, because the deep-blue emitting materials have its intrinsic wide band gap, so it is slightly difficult task to prepare materials with blue-emitting regime [22].…”

Highly efficient orange and white phosphorescent organic light-emitting devices with simplified structure

“…Another potential application for OLEDs is to be introduced for solid-state lighting in the near future [1][2][3][4][5][6][7]. In the past two decades, tremendous efforts have been spent to improve the performance of OLEDs such as developing efficient phosphorescent materials which can harvest both singlet and triplet excitons [8][9][10][11][12][13], exploiting various device configurations to efficiently utilize excitons [2][3][4]14]. Generally speaking, in order to obtain high efficiency, OLEDs always adopt multilayer structure including electron or hole/exciton blocking layer to avoid exciton quenching.…”