Improved efficiency roll-off at high brightness in simplified phosphorescent organic light emitting diodes with a crossfading-host

Highly Conductive and Uniform Alginate/Silver Nanowire Composite Transparent Electrode by Room Temperature Solution Processing for Organic Light Emitting Diode

“…Then the films were transferred into a high-vacuum chamber (operating pressure below 5 × 10 –6 Torr) to deposit the following organic and metal materials. The OLED used 1-nm-thick molybdenum trioxide (MoO 3 ) as a second HIL, 80-nm-thick N , N -dicarbazolyl-3,5-benzene (mCP) as the hole transporting layer (HTL), 0.2-nm-thick iridium­(III) bis­(2-(4-trifluoromethylphenyl)­pyridine) tetraphenylimidodiphosphinate (Ir­(tfmppy) 2 (tpip)) as the emitting layer (EML), − 57.5-nm-thick 1,3,5-tris­(1-phenyl-1 H -benzimidazol-2-yl)­benzene (TPBi) as the electron transporting layer (ETL), 1-nm-thick lithium fluoride (LiF) as the electron injection layer (EIL), and 80-nm-thick aluminum (Al) as the cathode. A quartz-crystal monitor was used to monitor the deposition rate.…”

33‐4: Enhanced Adhesion and Stability of Silver Nanowire Transparent Electrode for OLED by Compositing with a Biocompatible Polymer without High Temperature Treatment

“…twice on the ITO and AgNW/alginate electrodes to form a 60 nm thick film as hole-injection layer (HIL), and then annealed at 120 °C for 10 min. The following deposition of organic and metal materials was operated in a high-vacuum chamber with an base pressure below 5×10 -6 Torr: 1 nm-thick molybdenum trioxide (MoO 3 ) (second HIL), 80 nm-thick N,N-dicarbazolyl-3,5benzene (mCP) (hole transporting layer), 0.2 nm-thick iridium(III) bis(2-(4-trifluoromethylphenyl) pyridine) tetraphenylimidodiphosphinate (Ir(tfmppy) 2 (tpip)) (emitting layer) [6], 57.5 nm-thick 1,3,5-tris(1-phenyl-1H-benzimidazol-2yl)benzene (TPBi) (electron transporting layer), 1 nm-thick lithium fluoride (LiF) (electron injection layer), and 80 nm-thick aluminum (Al) (cathode). The active area of the device was 3 × 3 mm 2 .…”

Non-interlayer and color stable WOLEDs with mixed host and incorporating a new orange phosphorescent iridium complex

“…However, efficiency roll-off needs to be sincerely considered mainly because triplet exciton has long life time, causing severe exciton quenching at high exciton density with the increase of driving voltages. In this aspect, cohost for phosphor was proved to be an effective way not only for reducing roll-off, but also for high device-efficiency, mainly because of the expansion of recombination zone [8][9][10].…”