  BDMO-PPV is a photoluminescent semiconducting polymer related to others in
the well-studied polyphenylene vinylene family such as MEH-PPV. These materials
are known for their instability, degradation, and low efficiency in device
operations. We report increased internal and external quantum yield in BDMO-PPV
during continuous illumination photodegradation through variations in
absorbance, scattering, reflectance, and transmittance of the BDMO-PPV
solution. We propose the creation of a highly emissive intermediate
photoluminescent state responsible for these increased quantum yields.
