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Issue 25, 2017
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A colloidal quantum dot photonic crystal phosphor: nanostructural engineering of the phosphor for enhanced color conversion

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Abstract

Phosphors, long-known color-converting photonic agents, are gaining increasing attention owing to the interest in white LEDs and related applications. Conventional material-based approaches to phosphors focus on obtaining the desired absorption/emission wavelengths and/or improving quantum efficiency. Here, we report a novel approach for enhancing the performance of phosphors: structural modification of phosphors. We incorporated inorganic colloidal quantum dots (CQDs) into a lateral one-dimensional (1D) photonic crystal (PhC) thin-film structure, with its photonic band-edge (PBE) modes matching the energy of ‘excitation photons’ (rather than ‘emitted photons’, as in most other PBE application devices). At resonance, we observed an approximately 4-fold enhancement of fluorescence over the reference bulk phosphor, which reflects an improved absorption of the excitation photons. This nano-structural engineering approach is a paradigm shift in the phosphor research area and may help to develop next-generation higher efficiency phosphors with novel characteristics.

Graphical abstract: A colloidal quantum dot photonic crystal phosphor: nanostructural engineering of the phosphor for enhanced color conversion

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Publication details

The article was received on 13 Feb 2017, accepted on 21 May 2017 and first published on 23 May 2017


Article type: Paper
DOI: 10.1039/C7NR01055A
Citation: Nanoscale, 2017,9, 8703-8709
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    A colloidal quantum dot photonic crystal phosphor: nanostructural engineering of the phosphor for enhanced color conversion

    K. Min, H. Jung, Y. Park, K. Cho, Y. Roh, S. W. Hwang and H. Jeon, Nanoscale, 2017, 9, 8703
    DOI: 10.1039/C7NR01055A

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