Phosphine oxide functionalized pyrenes as efficient blue light emitting multifunctional materials for organic light emitting diodes

Godumala, Mallesham; Swetha, Chidirala; Niveditha, Surukonti; Mohanty, Maneesha Esther; Babu, N. Jagadeesh; Kumar, Arunandan; Bhanuprakash, K.; Rao, V. Jayathirtha

doi:10.1039/c4tc01753f

Cited by 93 publications

(52 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12 Pyrene-based materials have also 35 been produced by electropolymerization of pyrene, 14,15 polymerization of a suitable polymerizable moiety covalently linked to pyrene 16 or electropolymerization of pyrene-based copolymers. 17 These materials find applications in organic electronics such as organic photovoltaic cells, 18 organic light- 40 emitting diodes, 19 organic field-effect transistors 20 and organic lasers. 21 All these tremendous physico-chemical properties initially lie on the remarkable progresses achieved on pyrene functionalization.…”

Section: Introductionmentioning

confidence: 99%

Towards sustainable synthesis of pyren-1-yl azoliums via electrochemical oxidative C–N coupling

et al. 2015

View full text Add to dashboard Cite

Electrosynthesis of 1-methyl-3-(pyren-1-yl)-1H-imidazol-3-ium tetrafluoroborate via oxidative C-N coupling of pyrene with methylimidazole is optimized with the aim to reduce waste and simplify the experimental setup. Several parameters are tested such as cell configuration (number of compartments), pyrene concentration, amount of nucleophile, electrosynthetic method (potentiostatic/galvanostatic), 10 amount of electrons, atmosphere (Ar/air), solvent quality and presence/absence of supporting electrolyte. The optimized conditions are successfully applied to the synthesis of 1-methyl-3-(pyren-1-yl)-1Hbenzimidazol-3-ium tetrafluoroborate, 1-methyl-4-(pyren-1-yl)-1H-1,2,4-triazol-4-ium tetrafluoroborate and 3-(pyren-1-yl)-benzothiazol-3-ium tetrafluoroborate. These four pyren-1yl-azolium salts are characterized by NMR, MS, elemental analysis, UV-Vis. absorption and emission spectroscopies. The X-15 ray crystallographic structures of 1-methyl-3-(pyren-1-yl)-1H-imidazol-3-ium tetrafluoroborate and 1methyl-3-(pyren-1-yl)-1H-benzimidazol-3-ium tetrafluoroborate are presented.

show abstract

Section: Introductionmentioning

confidence: 99%

Towards sustainable synthesis of pyren-1-yl azoliums via electrochemical oxidative C–N coupling

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The introduction of phosphoryl (P = O)moiety will improve the coordination fields of the ancillary ligand to make a hypsochromic shift. More importantly, P = O is a strong electron-withdrawing group capable of polarizing the molecule, which has been widely used in bipolar host materials and electron transport materials based on its excellent electron transport property52535455565758596061. In our former publications, we also reported some efficient OLEDs with Ir(III) complexes containing the electron transport P = O moiety386263.…”

mentioning

confidence: 91%

Novel Design of Iridium Phosphors with Pyridinylphosphinate Ligands for High-Efficiency Blue Organic Light-emitting Diodes

Jing

et al. 2016

Sci Rep

View full text Add to dashboard Cite

Due to the high quantum efficiency and wide scope of emission colors, iridium (Ir) (III) complexes have been widely applied as guest materials for OLEDs (organic light-emitting diodes). Contrary to well-developed Ir(III)-based red and green phosphorescent complexes, the efficient blue emitters are rare reported. Like the development of the LED, the absence of efficient and stable blue materials hinders the widely practical application of the OLEDs. Inspired by this, we designed two novel ancillary ligands of phenyl(pyridin-2-yl)phosphinate (ppp) and dipyridinylphosphinate (dpp) for efficient blue phosphorescent iridium complexes (dfppy)2Ir(ppp) and (dfppy)2Ir(dpp) (dfppy = 2-(2,4-difluorophenyl)pyridine) with good electron transport property. The devices using the new iridium phosphors display excellent electroluminescence (EL) performances with a peak current efficiency of 58.78 cd/A, a maximum external quantum efficiency of 28.3%, a peak power efficiency of 52.74 lm/W and negligible efficiency roll-off ratios. The results demonstrated that iridium complexes with pyridinylphosphinate ligands are potential blue phosphorescent materials for OLEDs.

show abstract

“…[57][58][59][60] As a result, even in very dilute solution poly (1-vinylpyrene) (P(VPy), Fig. 18) shows an exclusively green emission with k PL at 491 nm and a low U PL of 13% due to excimer emission of pyrene moieties brought into a close distance by the polymer side chain.…”

Section: Fluorescent Polymersmentioning

confidence: 99%

Recent Advances in Polymer Organic Light-Emitting Diodes (PLED) Using Non-conjugated Polymers as the Emitting Layer and Contrasting Them with Conjugated Counterparts

Wong

2017

Journal of Elec Materi

View full text Add to dashboard Cite

Polymer organic light-emitting diodes (PLED) are one of the most studied subjects in flexible electronics thanks to their economical wet fabrication procedure for enhanced price advantage of the product device. In order to optimize PLED efficiency, correlating the polymer structure with the device performance is essential. An important question for the researchers in this field is whether the polymer backbone is conjugated or not as it affects the device performance. In this review, recent advances in non-conjugated polymers employed as the emitting layer in PLED devices are first discussed, followed by their contrast with the conjugated counterparts in terms of polymer synthesis, sample quality, physical properties and device performances. Such comparison between conjugated and non-conjugated polymers for PLED applications is rarely attempted, and; hence, this review shall provide a useful insight of emitting polymers employed in PLEDs.

show abstract

Phosphine oxide functionalized pyrenes as efficient blue light emitting multifunctional materials for organic light emitting diodes

Abstract: Efficient electron transporting blue emitting materials obtained from excimer emission assisted by thermally activated delayed fluorescence.

Cited by 93 publications

References 108 publications

Towards sustainable synthesis of pyren-1-yl azoliums via electrochemical oxidative C–N coupling

Towards sustainable synthesis of pyren-1-yl azoliums via electrochemical oxidative C–N coupling

Novel Design of Iridium Phosphors with Pyridinylphosphinate Ligands for High-Efficiency Blue Organic Light-emitting Diodes

Recent Advances in Polymer Organic Light-Emitting Diodes (PLED) Using Non-conjugated Polymers as the Emitting Layer and Contrasting Them with Conjugated Counterparts

Contact Info

Product

Resources

About