Journal
ADVANCED MATERIALS
Volume 22, Issue 4, Pages 531-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200902451
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Funding
- BMBF [FKZ 13N8167]
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Direct structuring of photocrosslinkable polyspirobifluorene copolymers by holographic lithography to yield insoluble, organic, distributed feedback (DFB) lasers with thresholds as low as 2 mu J cm(-2) is reported (see figure). These DFB lasers (X-LEP layer in figure) are embedded in the first optimized, multilayered slab-waveguide organic light-emitting diode with good luminance efficiency of similar to 6 cd A(-1) and concomitant low laser thresholds. The effect of electrical excitation on the optically pumped laser is investigated for the first time.
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