Analyzing nanostructures in mesogenic host–guest systems for polarized phosphorescence

Tsai, Yu Tang; Chen, Chien‐Yu; Chen, Li Yin; Liu, Su Hao; Wu, Chung Chih; Chi, Yun; Chen, Shaw H.; Hsu, Hsiu‐Fu; Lee, Jey Jau

doi:10.1016/j.orgel.2013.11.025

Cited by 17 publications

(12 citation statements)

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“…To date, most platinum-based luminescent metallomesogens employed nitrogen-containing heteroaromatic derivatives (2-phenylpyridine/2-phenylpyrimidine) or Schiff-base derivatives as the cyclometalated ligands and acetylacetonate derivatives as the ancillary ligands. [87][88][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104] In these complexes, the cyclometalated ligand, platinum ion and auxiliary ligand constitute the rigid core while the aliphatic chains are regarded as the flexible moiety. Generally speaking, the rigid core plays a critical role in the structural order and luminescence while the flexible parts induce the mesogenic properties.…”

Section: Platinum-based Luminescent Metallomesogensmentioning

confidence: 99%

“…Liu et al reported the first example of polarised OLEDs adopting a mesogenic platinum complex (20, n = 6). 95,96 In this contribution, aligned films of 20 were prepared by directly rubbing the surface of the cast film, followed by thermal annealing at 150 1C. The polarised PL emission of the film was measured at about 660 nm with a dichroic ratio (PL > /PL || ) of 2.…”

Section: Platinum-based Luminescent Metallomesogensmentioning

confidence: 99%

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Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

et al. 2015

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Luminescent liquid crystals (LCs) materials have attracted significant interests for organic optoelectronic applications, especially for linearly polarised emission, becaused of their combination of ordered alignment and luminescence property. Since the first polarised organic light-emitting diodes (OLEDs) demonstration in 1995, remarkable progress has been done with polarised electroluminescence because of continuous advances with the design of suitable LC materials. In this Review, we summarize luminescent LC materials with representative examples based on fluorescent materials, phosphorescent materials, and lanthanide complexes. The structure-property relationships for polarised emission and, when available, electroluminescence of these materials are presented and discussed, with a focus on phosphorescent metallomesogens. We also present the rational behind the design and development of luminescent LCs materials for high efficiency polarised OLEDs, along with the challenges ahead to achieve efficient devices.

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Section: Platinum-based Luminescent Metallomesogensmentioning

confidence: 99%

Section: Platinum-based Luminescent Metallomesogensmentioning

confidence: 99%

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

et al. 2015

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“…However, for such fluorescence emitters, the internal quantum efficiency of the OLEDs is limited to 25% according to the spin statistics because only singlet excitons can emit light. Recently, phosphorescent polarized OLEDs are reported based on Pt(II) phosphors in mesogenic host-gest systems with well-designed nanostructures and linearly polarized phosphorescence was achieved with a quarter-wave plate 15 16 .…”

mentioning

confidence: 99%

Circularly polarised phosphorescent photoluminescence and electroluminescence of iridium complexes

Jing

Liu

et al. 2015

Sci Rep

174

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Nearly all the neutral iridium complexes widely used as dopants in PhOLEDs are racemic mixtures; however, this study observed that these complexes can be separated into stable optically active Λ and ∆ isomers and that their chirality is an intrinsic property. The circularly polarised phosphorescent photoluminescence (CPPPL) signals of Λ/Δ isomers are perfect mirror images with opposite polarisation and equal intensity exhibiting a “handedness” for the polarisation. For the first time, we applied the Λ/Δ iridium isomers as emitters in OLEDs, and the circularly polarised phosphorescent electroluminescence (CPPEL) spectra reveal completely positive or negative broad peaks consistent with the CPPPL spectra. The results demonstrate that the Λ/Δ isomers have potential application for 3D OLEDs because they can exhibit high efficiency and luminance, and 3D display technology based on circularly polarised light is the most comfortable for the eyes.

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“…[24][25][26][27][28][29][30][31][32] Liu et al have reported linearly polarized EL based on a liquid-crystalline platinum complex doped into an oligofluorene matrix. 33,34 The device displayed current efficiency up to 2.4 cd A -1 with maximum luminance exceeding 2000 cd m -2 but with a polarization ratio of only ~2.…”

Section: Introductionmentioning

confidence: 99%

Linearly polarized electroluminescence from ionic iridium complex-based metallomesogens: the effect of aliphatic-chain on their photophysical properties

Xie

Cabry

et al. 2018

J. Mater. Chem. C

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Analyzing nanostructures in mesogenic host–guest systems for polarized phosphorescence

Cited by 17 publications

References 50 publications

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

Circularly polarised phosphorescent photoluminescence and electroluminescence of iridium complexes

Linearly polarized electroluminescence from ionic iridium complex-based metallomesogens: the effect of aliphatic-chain on their photophysical properties

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