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ABSTRACT Semiconductor quantum dots (QDs) can be used as alternative for transition metal complexes to harvest the nonemissive triplet excitons in organic light-emitting diodes (OLEDs). In search for a QD-based OLED material generating blue emission, poly(9-vinylcarbazole) (PVK) and poly(9-(2,3-epoxypropyl) carbazole) (PEPK) are chosen as host for blue-emitting CdSe/ZnS core/shell QDs. The QDs are encapsulated with 16-( N-carbazolyl) hexadecanoic acid (C16), a ligand terminated by a carbazole moiety. As alternative for PVK, PEPK, where the lower molecular weight and less extensive excimer formation could promise a better film formation and more extensive exciton hopping, is explored. The efficiencies of singlet ( [ABSTRACT FROM AUTHOR]