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Enhancing the device performance of a blue light-emitting copolymer using CdSe/ZnS quantum dots

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ABSTRACT

An alternating triarylamine-functionalized fluorene-based copolymer synthesized using a Suzuki–Miyaura cross-coupling procedure is used as blue emitting layer in polymer light-emitting diodes (PLEDs). Subsequently, the effects of CdSe/ZnS quantum dots (QDs) on the optoelectronic properties of the copolymer are investigated. Therefore, CdSe/ZnS QDs are embedded into the copolymer matrix and hybrid PLEDs are fabricated. The devices comprised of CdSe/ZnS QDs reveal enhanced performances, yielding about 3.4 times more luminous efficiency than that of the device without QDs. Further enhancement is achieved by using electron transport layer; the luminous efficiency rose from 0.065 to 1.740 cd A−1 for the hybrid PLEDs, corresponding to a superb 27-fold intensification of the efficiency. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014, 52, 147–156

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