{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Kim TJ"],"funding":["Korean government","National Research Foundation"],"pagination":["e2207653"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC10190583"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["10(14)"],"pubmed_abstract":["Interlayer excitons (IXs) at the interface of heterostructures (HSs) with a staggered band alignment are fascinating quantum quasi-particles with light-emitting and long-lifetime characteristics. In this study, the energy band alignments (EBAs) of the HS of MAPbI<sub>3</sub> perovskite thin sheets with CdSe-ZnS core-shell quantum dot (QD) layers are modulated by using different diameters of the QDs. Far-red IX emission is observed at 1.42 eV from the HS of MAPbI<sub>3</sub> /CdSe-ZnS-QD (λ<sub>em</sub>  = 645 nm) with type-II EBA owing to charge transfer. The lifetime of the far-red IXs is estimated to be 5.68 µs, which is considerably longer than that (0.715 ns) of the intralayer excitons from CdSe-ZnS-QD. With increasing incident excitation power, the PL peak and its intensity of IXs are blue-shifted and linearly increased, respectively, indicating a strong dipole alignment of far-red IXs at the heterojunction. Back focal plane imaging suggests that the directions of dipole moments of the IXs are relatively out-of-plane compared to those of the intralayer excitons (MAPbI<sub>3</sub> and CdSe-ZnS-QD). Notably, the abnormal behavior of the optical characteristics is observed near the phase transition temperature (90 K) of MAPbI<sub>3</sub> . MAPbI<sub>3</sub> /CdSe-ZnS-QD HS photodetectors show the increase in photocurrent and detectivity compared to MAPbI<sub>3</sub> at IX excitation."],"journal":["Advanced science (Weinheim, Baden-Wurttemberg, Germany)"],"pubmed_title":["Far-Red Interlayer Excitons of Perovskite/Quantum-Dot Heterostructures."],"pmcid":["PMC10190583"],"funding_grant_id":["2022R1A2C2009412","2021R1A2C2005885"],"pubmed_authors":["Seo C","Kim TJ","Joo J","Lee SH","Kim J","Lee E"],"additional_accession":[]},"is_claimable":false,"name":"Far-Red Interlayer Excitons of Perovskite/Quantum-Dot Heterostructures.","description":"Interlayer excitons (IXs) at the interface of heterostructures (HSs) with a staggered band alignment are fascinating quantum quasi-particles with light-emitting and long-lifetime characteristics. In this study, the energy band alignments (EBAs) of the HS of MAPbI<sub>3</sub> perovskite thin sheets with CdSe-ZnS core-shell quantum dot (QD) layers are modulated by using different diameters of the QDs. Far-red IX emission is observed at 1.42 eV from the HS of MAPbI<sub>3</sub> /CdSe-ZnS-QD (λ<sub>em</sub>  = 645 nm) with type-II EBA owing to charge transfer. The lifetime of the far-red IXs is estimated to be 5.68 µs, which is considerably longer than that (0.715 ns) of the intralayer excitons from CdSe-ZnS-QD. With increasing incident excitation power, the PL peak and its intensity of IXs are blue-shifted and linearly increased, respectively, indicating a strong dipole alignment of far-red IXs at the heterojunction. Back focal plane imaging suggests that the directions of dipole moments of the IXs are relatively out-of-plane compared to those of the intralayer excitons (MAPbI<sub>3</sub> and CdSe-ZnS-QD). Notably, the abnormal behavior of the optical characteristics is observed near the phase transition temperature (90 K) of MAPbI<sub>3</sub> . MAPbI<sub>3</sub> /CdSe-ZnS-QD HS photodetectors show the increase in photocurrent and detectivity compared to MAPbI<sub>3</sub> at IX excitation.","dates":{"release":"2023-01-01T00:00:00Z","publication":"2023 May","modification":"2025-04-25T22:28:13.921Z","creation":"2025-04-06T09:06:13.848Z"},"accession":"S-EPMC10190583","cross_references":{"pubmed":["36938849"],"doi":["10.1002/advs.202207653"]}}