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A Lasing Organic Light‐Emitting Diode
Author(s) -
Wallikewitz Bodo H.,
de la Rosa Matthias,
Kremer Jonas H.W. M.,
Hertel Dirk,
Meerholz Klaus
Publication year - 2010
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200902451
Subject(s) - lasing threshold , materials science , optoelectronics , laser , oled , holography , diode , lithography , optics , layer (electronics) , nanotechnology , physics , wavelength
Direct structuring of photocrosslinkable polyspirobifluorene copolymers by holographic lithography to yield insoluble, organic, distributed feedback (DFB) lasers with thresholds as low as 2 µJ 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 ∼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.