Light emitting polymers linear absorption

We now turn to a description of the optical properties. Figures 11.1 and 11.2 show the characteristic linear absorption spectrum of the phenyl-based light emitting polymers. These are... 

The efficiency of PL polarizers is chiefly limited by the luminophore s quantum yield which, ultimately, can approach unity, but for PL polymers typically is up to 80 % (24,33). However, when used in a standard PL LCD configuration (see above), only 50 % of light incident from the light source is used, since the absorption of these PL polarizers is also anisotropic (74-25). We recently have demonstrated a new concept for polymer-based PL polarizers which overcome this limitation and can be used in PL LCDs with, in principle, an ultimate efficiency of unity (34,35). These PL polarizers comprise a nearly randomly oriented sensitizer that maximally harvests light by isotropic absorption, efficiently transfers the energy to a uniaxially oriented PL polymer which, subsequently, emits highly linearly polarized light. Key step is a... 

---