Tzenka Miteva et al 2008 New J. Phys. 10 103002 doi:10.1088/1367-2630/10/10/103002
Annihilation assisted upconversion: all-organic, flexible and transparent multicolour display
Tzenka Miteva1,3, Vladimir Yakutkin2, Gabriele Nelles1 and Stanislav Baluschev2,3
Show affiliationsIn 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
- Subjects
- Dates
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Issue 10 (October 2008)
Received 3 June 2008
Published 2 October 2008
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Annihilation assisted upconversion: all-organic, flexible and transparent multicolour display
Tzenka Miteva et al 2008 New J. Phys. 10 103002
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