Polyphenylene vinylene-based conjugated-nonconjugated alternating block copolymers form the active chromophores in a series of light emitting diodes (LEDs). The quantum efficiency and brightness of these devices can be improved by several orders of magnitude by incorporation of appropriate carrier transport layers and by rational choice of electrodes. Further improvements can be gained by blending of the active chromophores with high or low molecular weight species.
KARASZ, Frank E.; HU, Bin; and YANG, Zhou (1997) "Polymer Light Emitting Diodes," Turkish Journal of Chemistry: Vol. 21: No. 1, Article 1. Available at: https://journals.tubitak.gov.tr/chem/vol21/iss1/1