Emission color, fine-tuning

Blending with dialkoxy-PPV 14 in a device (ITO/PEDOT/polymer blend layer/LiF/Ca) substantially improved the EL efficiency (by about two orders of magnitude). A moderately efficient energy transfer from the higher band-gap PPV (AEL = 650 nm) to PT 468 (AEL = 830 nm) allowed fine-tuning of the emission color by changing the component ratio (Figure 2.32) [569],... 

Color. All colors are now available (Figs. 35 and 36). Fine adjustments are possible (see above). However, the emission spectra are broader than those defining the primary colors [258]. Narrower and more structured emission bands have now been obtained by fine tuning of the polymerization conditions [296] or processing conditions [108] (see Fig. 15), so there is hope that this problem can be solved. 

The ring-opening metathesis polymerization of side chain functionalized norbornene monomers was applied to obtain electroluminescent polymers (Scheme 38) [100,101]. Homo- and copolymers with 25 or 50 repeat units were prepared with ranging from 19,400-53,000Da and M jM = 1.02-1.04. The color of emission could be fine tuned by... 

Nanofluids can also be studied with these kinds of nsmothermometers. In Ref. [69] fine-tuning of the emission color as a function of the temperature, the OIH host, and the complex ligands has been demonstrated together with absolute measurements in the 293-320 K range. Moreover, authors also show the measurement of the heat propagation velocity in a nanofluid by using steady-state photoluminescence spectra. 

The outstanding optical activities of conjugate OPV rods can be upgraded by adopting supramolecular concepts. As described in Sect. 2.6, fibrous aggregates of OPV rod molecules were able to enhance light-harvesting behavior, and fmther fine-tune emissive colors via donor-acceptor complexes. 

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