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We propose effective charge balance CdSe/ZnS quantum dots-based light-emitting devices (QLEDs) using polyvinyl pyrrolidone (PVP)-capped ZnO nanoparticles (NPs) synthesized by sol-gel process as electron transport layer. In general, ZnO NPs have a trap-site induced from oxygen vacancies. An oxygen vacancy captures electrons and reduces the performance of QLEDs. In order to reduce the oxygen vacancies...
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