Dibenzofuran-based iridium complexes as green emitters: Realizing PhOLEDs with high power efficiency and extremely low efficiency roll-off

Fang, Daqi; Sun, Yue; Chen, Youquan; Fu, Tianchen; Ali, Muhammad Umair; He, Yaowu; Miao, Jingsheng; Yan, Chaoyi; Meng, Hong

doi:10.1016/j.dyepig.2019.107990

Cited by 11 publications

(11 citation statements)

References 35 publications

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“…The channel length and width of the OFETs were 100 μ m and 1000 μ m, respectively. The green-color OLEDs were fabricated following a previous report [ 52 ]. The layer structure of the OLED was ITO/HATCN (5 nm)/ N , N ′-bis(naphthalen-1-yl)- N , N ′-bis(phenyl)-benzidine (30 nm)/ N , N -bis(4-(dibenzo[b,d]furan-4-yl)phenyl)[1,1′:4′,1 ″ -terphenyl]-4-amine (10 nm)/DMIC-CZ:DMIC-TRZ:Ir(ppy) 2 acac (40 nm)/ANT-BIZ (70 nm)/Liq (2.5 nm)/Al (100 nm), and the layers were sequentially deposited by thermal evaporation.…”

Section: Methodsmentioning

confidence: 99%

Hysteresis-Free, High-Performance Polymer-Dielectric Organic Field-Effect Transistors Enabled by Supercritical Fluid

et al. 2020

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Organic field-effect transistors (OFETs) are of the core units in organic electronic circuits, and the performance of OFETs replies critically on the properties of their dielectric layers. Owing to the intrinsic flexibility and natural compatibility with other organic components, organic polymers, such as poly(vinyl alcohol) (PVA), have emerged as highly interesting dielectric materials for OFETs. However, unsatisfactory issues, such as hysteresis, high subthreshold swing, and low effective carrier mobility, still considerably limit the practical applications of the polymer-dielectric OFETs for high-speed, low-voltage flexible organic circuits. This work develops a new approach of using supercritical CO2 fluid (SCCO2) treatment on PVA dielectrics to achieve remarkably high-performance polymer-dielectric OFETs. The SCCO2 treatment is able to completely eliminate the hysteresis in the transfer characteristics of OFETs, and it can also significantly reduce the device subthreshold slope to 0.25 V/dec and enhance the saturation regime carrier mobility to 30.2 cm2 V−1 s−1, of which both the numbers are remarkable for flexible polymer-dielectric OFETs. It is further demonstrated that, coupling with an organic light-emitting diode (OLED), the SCCO2-treated OFET is able to function very well under fast switching speed, which indicates that an excellent switching behavior of polymer-dielectric OFETs can be enabled by this SCCO2 approach. Considering the broad and essential applications of OFETs, we envision that this SCCO2 technology will have a very broad spectrum of applications for organic electronics, especially for high refresh rate and low-voltage flexible display devices.

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Section: Methodsmentioning

confidence: 99%

Hysteresis-Free, High-Performance Polymer-Dielectric Organic Field-Effect Transistors Enabled by Supercritical Fluid

et al. 2020

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“…11,12 OLEDs also possess numerous other advantages such as wide visual angle, color gamut, high contrast ratio, light weight, flexibility (enabling them to be rolled or bent), compatibility, fast response time and low driving voltage. [13][14][15][16] This makes OLEDs a potential candidate for next-generation displays. However, despite their diverse advantages, OLEDs suffer from crucial challenges such as limited choice of materials and complex fabrication of devices.…”

Section: Introductionmentioning

confidence: 99%

Computational aspects to design iridium complexes as emitters for OLEDs

Lakshmi

Mahalakshmi

2022

Mol. Syst. Des. Eng.

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“…As the most widely used luminescent guest material in practical organic light-emitting diodes (OLEDs), the iridium(III) complex has achieved great development in the past decades [1][2][3]. Until now, part of green, yellow and red iridium complexes have been used in commercial OLEDs [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Phenylpyrimidine-Based Iridium Complex for High-Performance Green-Yellow Phosphorescent Organic Light-Emitting Diodes

Zhang

Li³

et al. 2022

J. Phys.: Conf. Ser.

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In this work, a phenylpyrimidine-based green-yellow iridium complex, (bpp)2Ir(acac), is prepared. Tert-butyl group is introduced to weaken the intermolecular interaction and endow (bpp)2Ir(acac) with favorable physical properties. Phosphorescent device which utilizes (bpp)2Ir(acac) as the luminescent guest material displays high efficiencies (73.9 cd/A, 84.8 lm/W, 21.2%), low efficiency roll-off (from 100 to 10000 cd/m2: 5.1%), relatively low concentration sensitivity (from 5% to 12%) and very stable electroluminescent spectra (from 1 cd/m2 to maximum luminance). As a consequence of the results proved that (bpp)2Ir(acac) is a good phosphorescent material.

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Dibenzofuran-based iridium complexes as green emitters: Realizing PhOLEDs with high power efficiency and extremely low efficiency roll-off

Cited by 11 publications

References 35 publications

Hysteresis-Free, High-Performance Polymer-Dielectric Organic Field-Effect Transistors Enabled by Supercritical Fluid

Hysteresis-Free, High-Performance Polymer-Dielectric Organic Field-Effect Transistors Enabled by Supercritical Fluid

Computational aspects to design iridium complexes as emitters for OLEDs

Phenylpyrimidine-Based Iridium Complex for High-Performance Green-Yellow Phosphorescent Organic Light-Emitting Diodes

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