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44.5L: Late‐News Paper : All‐organic, Transparent Up‐conversion Displays with Tailored Excitation and Emission Wavelengths
Author(s) -
Miteva Tzenka,
Roberts Anthony,
Nelles Gabriele,
Yakutkin Vladimir,
Baluschev Stanislav
Publication year - 2008
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3069752
Subject(s) - excitation , optoelectronics , transmittance , materials science , oled , wavelength , laser , diode , annihilation , fabrication , optics , quantum yield , fluorescence , physics , nanotechnology , medicine , alternative medicine , layer (electronics) , quantum mechanics , pathology
In this paper we describe the World's first all‐organic, transparent, flexible, versatile color displays based upon triplet‐triplet annihilation assisted photon up‐conversion. The devices work with ultra‐low excitation intensities down to 10 mWcm −2 red/near‐IR light. The displays are based on metallated‐porphyrin sensitizers in combination with emitters in a transparent matrix and are driven by galvano‐scanned laser diodes. The displays have external quantum yield as high as 3.2%. The response time can be adjusted to specific application requirements — from a few μs to few 100 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 multicolor emission, using only one excitation source. There are practically no display size limitations and it is a very simple, cost‐effective fabrication.