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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Annihilation assisted upconversion: all-organic, flexible and transparent multicolour display

Tzenka Miteva1,3, Vladimir Yakutkin2, Gabriele Nelles1 and Stanislav Baluschev2,3

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In this paper, we demonstrate the first all-organic, transparent, flexible, versatile colour displays based upon triplet–triplet annihilation assisted photon energy upconversion in viscous polymeric matrix. The devices work with ultra-low excitation intensities down to 20 mW cm−2 red or near-IR light. The displays are based on metallated-porphyrin sensitizers in combination with emitters dispersed in a transparent polymeric matrix and are driven by galvo-scanned laser diodes. The displays have external quantum yield as high as 3.2%. The response time can be adjusted to specific application requirements—up to 80 μs allowing kHz-refreshment rate of the displayed information. It is possible to easily tune the optical density of the screens in order to obtain a desired transmittance for the excitation beam. We demonstrate the ability to achieve multicolour emission, using only one excitation source. There are practically no display size limitations.


PACS

85.60.Pg Display systems

42.79.Kr Display devices, liquid-crystal devices

Subjects

Electronics and devices

Optics, quantum optics and lasers

Dates

Issue 10 (October 2008)

Received 3 June 2008

Published 2 October 2008



  1. Annihilation assisted upconversion: all-organic, flexible and transparent multicolour display

    Tzenka Miteva et al 2008 New J. Phys. 10 103002

  2. Observation of a kilogram-scale oscillator near its quantum ground state

    B Abbott et al 2009 New J. Phys. 11 073032

  3. Atomic time-keeping from 1955 to the present

    Bernard Guinot and Elisa Felicitas Arias 2005 Metrologia 42 S20

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