CHARACTERIZATION OF THE EMISSION FROM A CONJUGATED POLYMER MICROCAVITY

We report the results of a study on microcavity structures containing the conjugated polymer poly(2,5-dialkoxy-p-phenylenevinylene). Strong spectral narrowing, from a full width at half-maximum (FWHM) of 128 to 16 nm for photoluminescence (PL) and 112 to 35 nm for electroluminesc ence (EL) is observed. Modification of the cavity path length is used to produce a shift in the PL peak emission wavelength by 50 nm. in add ition, we show that the EL emission wavelength has a clear angular dep endence that can be described using a transfer-matrix reflectivity (TM R) model. These are characteristic signatures of the modification of s pontaneous emission properties through coupling to resonant cavity mod es.