Synthesis and characterization of a new iridium(III) complex with bulky trimethylsilylxylene and applications for efficient yellow-green emitting phosphorescent organic light emitting diodes

So, Ki Ho; Kim, Ran; Park, Hyuntae; Kang, Il‐Suk; Thangaraju, K.; Kim, Jang‐Joo; Kwon, Soon‐Ki; Kim, Yun‐Hi

doi:10.1016/j.dyepig.2011.04.017

Cited by 28 publications

(9 citation statements)

References 24 publications

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“…Ki. H. So et al ., designed and synthesized a new iridium(III) complex with phenyl pyridine ligands containing a bulky trimethylsilylxylene, 5‐(2,5‐dimethyl‐4‐(trimethylsilyl)phenyl)‐2‐phenylpyridine [Ir(dmtppy)3] (complex‐60, Figure ) . In absorption spectra, spin‐allowed transitiones absorved below 320 nm and MLCT transitions absorved below 500 nm.…”

Section: Homoleptic Ir(ppy)3 Complexesmentioning

confidence: 99%

Structural Mimics of Phenyl Pyridine (ppy) – Substituted, Phosphorescent Cyclometalated Homo and Heteroleptic Iridium(III) Complexes for Organic Light Emitting Diodes – An Overview

Kajjam

Vaidyanathan

2017

The Chemical Record

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Today organic light emitting diodes are a topic of significant academic and industrial research interest. OLED technology is used in commercially available displays, and efforts have been directed to improve this technology. Design and synthesis of phosphorescent based transition metals are capable of harvesting both singlet and triplet excitons and achieve 100 % internal quantum efficiency is an active area of research. Among all the transition metals, iridium is considered a prime candidate for OLEDs due to its prominent photophysical characteristics. In the present review, we have concentrated on the Iridium based homo and heteroleptic complexes that have dissimilar substitutions on phenylpyridine ligands, different ancillary ligands and the effect of substitution on HOMO/LUMO energies and a brief discussion and correlation on the photophysical, electrochemical and device performances of the different complexes have been reviewed for organic light emitting diodes.

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Section: Homoleptic Ir(ppy)3 Complexesmentioning

confidence: 99%

Structural Mimics of Phenyl Pyridine (ppy) – Substituted, Phosphorescent Cyclometalated Homo and Heteroleptic Iridium(III) Complexes for Organic Light Emitting Diodes – An Overview

Kajjam

Vaidyanathan

2017

The Chemical Record

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“…Moreover, the multi-functional groups (branches) endow dendrimers with special properties. Dendrimers are used in drugs delivery and carriers [3][4][5][6] , fuel cells 7 , light-emitting diodes 8,9 , liquid crystals 10 and chemical modifications 11,12 , membrane separation 13 . In nowadays, most investigators have focused their attentions on the free dendrimers, while the properties and applications of other kinds of supported dendrimers are seldom reported.…”

Section: Introductionmentioning

confidence: 99%

Investigation about the copper adsorption on the chloropropylsilica gel surface modified with a nanostructured dendrimer DAB-Am-16: an analytical application for determination of copper in different samples

Carmo

Paim

2012

Mat. Res.

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The third generation (G-3) poly(propyleneimine)hexadecaamine dendrimer (DAB-Am-16) was grafted onto the chloropropylsilica gel surface (DPPIPS). The modified silica (DPPIPS) was characterized by Electronic (Uv-Vis), vibrational and Electron Paramagnetic Resonance (EPR), spectrocopies, surface area (331.07 m 2 .g -1) and porosity analyses (pore diameter of 41.9 nm) and cyclic voltammetry technique. The copper adsorption studies were performed using a batchwise process and the DPPIPS showed adsorption capacities of 16.3, 47.8 and 659.5 mol.g -1 in aqueous, ethanol and acetone medium, respectively, with recoveries close to 100% after percolation with HCl 1.0 mol.L -1 . The results suggest that the sorption of copper ions on DPPIPS occurs mainly by surface complexation and a Langmuir model allowed describing the sorption of the metal ions on DPPIPS. As an application of this chemically modified material, copper was determined in real samples of distilled spirits and fuel alcohol.

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“…recombination takes place) on the doped regions of CBP by the GY emitter. After performance optimization as shown in Figure 1c, we have achieved a decent CE (EQE) of ∼53.6 cd/A (15.2%) at a luminance of 1,000 cd/m 2 with a emissive layer thickness of 15 nm and a GY doping level of 8% in CBP, which is among the best greenish‐yellow PHOLED performances reported to date 22, 26–28…”

Section: Resultsmentioning

confidence: 83%

“…Unfortunately, there are relatively few reports on greenish‐yellow emitters for PHOLEDs 22–29. As a result, the performance of greenish‐yellow emitters is significantly behind those emitting in the three primary colors, which are driven by the display industry.…”

Section: Introductionmentioning

confidence: 99%

“…Hudson et al26, 27 demonstrated a triarylboron‐functionalized Pt(II) complex greenish‐yellow emitter with a peak emission at 538 nm, that exhibits device external quantum efficiency (EQE) of 16.5%, current efficiency (CE) of 53.0 cd/A, and power efficiency (PE) of 45.0 lm/W at 1000 cd/m 2 . So et al28 synthesized a trimethylsilylxylene‐based greenish‐yellow Ir(III) emitter with a peak wavelength at 532 nm, and demonstrated PHOLEDs with maximum EQE and CE of 12.7% and 45.7 cd/A, respectively, at ∼10 cd/m 2 . More recently, Chen et al .…”

Section: Introductionmentioning

confidence: 99%

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Highly Efficient Greenish‐Yellow Phosphorescent Organic Light‐Emitting Diodes Based on Interzone Exciton Transfer

Chang

Kamino

Wang

et al. 2013

Adv Funct Materials

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Phosphorescent organic light emitting diodes (PHOLEDs) have undergone tremendous growth over the past two decades. Indeed, they are already prevalent in the form of mobile displays, and are expected to be used in large‐area flat panels recently. To become a viable technology for next generation solid‐state light source however, PHOLEDs face the challenge of achieving concurrently a high color rendering index (CRI) and a high efficiency at high luminance. To improve the CRI of a standard three color white PHOLED, one can use a greenish‐yellow emitter to replace the green emitter such that the gap in emission wavelength between standard green and red emitters is eliminated. However, there are relatively few studies on greenish‐yellow emitters for PHOLEDs, and as a result, the performance of greenish‐yellow PHOLEDs is significantly inferior to those emitting in the three primary colors, which are driven strongly by the display industry. Herein, a newly synthesized greenish‐yellow emitter is synthesized and a novel device concept is introduced featuring interzone exciton transfer to considerably enhance the device efficiency. In particular, high external quantum efficiencies (current efficiencies) of 21.5% (77.4 cd/A) and 20.2% (72.8 cd/A) at a luminance of 1000 cd/m2 and 5000 cd/m2, respectively, have been achieved. These efficiencies are the highest reported to date for greenish‐yellow emitting PHOLEDs. A model for this unique design is also proposed. This design could potentially be applied to enhance the efficiency of even longer wavelength yellow and red emitters, thereby paving the way for a new avenue of tandem white PHOLEDs for solid‐state lighting.

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Synthesis and characterization of a new iridium(III) complex with bulky trimethylsilylxylene and applications for efficient yellow-green emitting phosphorescent organic light emitting diodes

Cited by 28 publications

References 24 publications

Structural Mimics of Phenyl Pyridine (ppy) – Substituted, Phosphorescent Cyclometalated Homo and Heteroleptic Iridium(III) Complexes for Organic Light Emitting Diodes – An Overview

Structural Mimics of Phenyl Pyridine (ppy) – Substituted, Phosphorescent Cyclometalated Homo and Heteroleptic Iridium(III) Complexes for Organic Light Emitting Diodes – An Overview

Investigation about the copper adsorption on the chloropropylsilica gel surface modified with a nanostructured dendrimer DAB-Am-16: an analytical application for determination of copper in different samples

Highly Efficient Greenish‐Yellow Phosphorescent Organic Light‐Emitting Diodes Based on Interzone Exciton Transfer

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