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  • Circularly polarised phosphorescent photoluminescence and electroluminescence of iridium complexes

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    Author(s)
    Li, Tian-Yi
    Jing, Yi-Ming
    Liu, Xuan
    Zhao, Yue
    Shi, Lin
    Tang, Zhiyong
    Zheng, You-Xuan
    Zuo, Jing-Lin
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2015
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    Abstract
    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 ...
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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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    Journal Title
    Scientific Reports
    Volume
    5
    DOI
    https://doi.org/10.1038/srep14912
    Copyright Statement
    © The Author(s) 2015. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
    Subject
    Biochemistry and cell biology not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/172635
    Collection
    • Journal articles

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