Koc, FatihSahin, Mehmet2021-03-122021-03-1220191432-06300947-8396https://doi.org/10.1007/s00339-019-3000-3https://hdl.handle.net/20.500.12573/588This study was supported by TUBITAK TBAG with project number 109T729. One of the authors (MS) thanks Abdullah Gul University Foundation (AGUV) for their partial financial support.It has been recently reported that multi-shell type-II quantum dot nanocrystals (QDNCs) have higher quantum yields. Besides these higher quantum yields of multi-shell type-II QDNCs, additional second layer has been a critical influence on the formation mechanisms of the excitonic structures. Understanding of bound and unbound cases of the excitonic structures in multi-shell type-II QDNCs gives some important information for applications. In this study, we have investigated the electronic and optical properties of a single exciton (X), biexciton (XX), and positively and negatively charged excitons (X+ and X-) in CdSe/CdTe-based multi-shell type-II QDNCs. In the study, three different structure compositions, i.e., CdSe/ CdTe, CdSe/CdTe/CdS, and CdSe/CdTe/ZnTe, have been considered. We have observed that CdS and ZnTe materials have drastically changed the electronic and optical properties of the bare CdSe/CdTe type-II QDNCs.enginfo:eu-repo/semantics/closedAccessEMISSIONLIGHT-EMITTING DEVICESDIELECTRIC CONFINEMENTSEPARATIONarticleVolume: 12510