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dc.contributor.authorAkin, Seckin
dc.contributor.authorAltintas, Yemliha
dc.contributor.authorMutlugun, Evren
dc.contributor.authorSonmezoglu, Savas
dc.descriptionEM acknowledges TUBA GEBIP award. EM and YA acknowledge Abdullah Gul University Scientific Research Project no: FAB-2015-10.en_US
dc.description.abstractDespite the excellent photovoltaic performances of perovskite solar cells (PSCs), the instability of PSCs under severe environment (e.g. humidity, light-induced, etc.) limits further commercialization of such devices. Therefore, in recent years, research on the long-term stability improvement of PSCs has been actively carried out in perovskite field. To address these issues, we demonstrated the incorporation of ultra-thin interfacial layer of inorganic CsPbBr1.85I1.15 perovskite quantum-dots (PQDs) that can effectively passivate defects at or near to the perovskite/hole transport material (HTM) interface, significantly suppressing interfacial recombination. This passivation layer increased the open circuit voltage (V-oc) of triple-cation perovskite cells by as much as 50 mV, with champion cells achieving V-oc similar to 1.14 V. As a result, we obtained hysteresis-free cells with the efficiency beyond 21%. More importantly, devices based on such architecture are capable of resisting humidity and light-induced. Remarkably, the device employing CsPbBr1.85I1.15 demonstrated a superb shelf-stability aganist to humidity under ambient conditions (R.H. >= 40%), retaining nearly 91% of initial efficiency after 30 days, while the efficiency of control device rapidly dropped to 45% from its initial value under the same conditions. Besides benefiting from the high moisture resistivity as well as supressed ion migration, PSC5 based on PQDs showed better operational stability (retaining 94% of their initial performance) than that of the PQDs-free one under continuous light irradiation over 400 h. In addition, a faster PL decay time of 4.66 ns was attained for perovskite/PQDs structure (5.77 ns for only PQDs structure) due to the favorable energy transfer at the interface, indicating a Forster resonance energy transfer (FRET) mechanism. This work indicates that inorganic PQDs are important materials as interlayer in PSC5 to supremely enhance the device stability and efficiency.en_US
dc.description.sponsorshipTurkish Academy of Sciences Abdullah Gul University FAB-2015-10en_US
dc.subjectPerovskite solar cellsen_US
dc.subjectInterfacial layeren_US
dc.subjectCsPbBrxI3-x inorganic perovskite quantum-dotsen_US
dc.titleCesium-lead based inorganic perovskite quantum-dots as interfacial layer for highly stable perovskite solar cells with exceeding 21% efficiencyen_US
dc.contributor.departmentAGÜ, Mühendislik Fakültesi, Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümüen_US
dc.identifier.volumeVolume: 60en_US
dc.relation.journalNANO ENERGYen_US
dc.relation.publicationcategoryMakale - Uluslararası - Editör Denetimli Dergien_US

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