Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4520
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dc.contributor.authorAmelot, Dylanen_US
dc.contributor.authorGOYAL, MAYANKen_US
dc.contributor.authorNAG, ANGSHUMAN et al.en_US
dc.date.accessioned2020-03-31T07:17:41Z
dc.date.available2020-03-31T07:17:41Z
dc.date.issued2020-02en_US
dc.identifier.citationJournal of Physical Chemistry C, 124(6), 3873-3880.en_US
dc.identifier.issn1932-7447en_US
dc.identifier.issn1932-7455en_US
dc.identifier.urihttp://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4520
dc.identifier.urihttps://doi.org/10.1021/acs.jpcc.9b10946en_US
dc.description.abstractLead halide perovskite nanocrystals have attracted attention in the field of nanocrystal-based light-emitting diode and solar cells, because their devices showed high performances in only a few years. Among them, CsPbI3 is a promising candidate for solar cell design in spite of a too wide band gap and severe structural stability issue. Its hybrid organic–inorganic counterpart (NH2)2CHPbI3 (FAPI), where the Cs is replaced with formamidinium (FA), presents a smaller band gap and also an improved structural stability. Here, we have investigated the energy landscape of pristine FAPI, and the interface of FAPI with electron and hole selective layers using transport, photoemission, and noncontact surface photovoltage by means of time-resolved photoemission. We have found from transport and photoemission that its Fermi level is deeply positioned in the band gap, enabling the material to be almost intrinsic. Time-resolved photoemission has revealed that the interface of pristine FAPI is bended toward downward side, which is consistent with a p-type nature for the interface (i.e., hole as majority carrier). Using TiOx and MoOx contacts, as a model for the electron and hole transport layer, respectively, allows the electron transfer from the TiOx to the FAPI and from the FAPI to the MoOx. The latter is revealed by time-resolved photoemission showing inverted band bending for the two interfaces. From these results, we clearly present the energy landscape of FAPI and its interfaces with TiOx and MoOx in the dark and under illumination. These insights are of utmost interest for the future design of FAPI-based solar cell.en_US
dc.language.isoenen_US
dc.publisherAmerican Chemical Societyen_US
dc.subjectChemistryen_US
dc.subjectTOC-MAR-2020en_US
dc.subject2020en_US
dc.subject2020-MAR-WEEK5en_US
dc.titleRevealing the Band Structure of FAPI Quantum Dot Film and Its Interfaces with Electron and Hole Transport Layer Using Time Resolved Photoemissionen_US
dc.typeArticleen_US
dc.contributor.departmentDept. of Chemistryen_US
dc.identifier.sourcetitleJournal of Physical Chemistry Cen_US
dc.publication.originofpublisherForeignen_US
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