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- W4234311100 abstract "Interfacial electronic structure at the perovskite CH3NH3PbI3/TiO2 or MAPbI3/TiO2 interface has been investigated using a high-resolution synchrotron photoemission spectroscopy. The core levels and valence band spectra of our solution-processed MAPbI3 layers spin-coated on a mesoporous TiO2 substrate are consistent with a pure iodide perovskite (MAPbI3) with residual methylammonium (CH3NH3+) trapped within the perovskite crystal lattice, which is in contact with TiO2. In addition, we show spectroscopic evidence for the presence of PbI2 and methylamine (CH3NH2) at the MAPbI3/TiO2 interface. Interestingly, the Fermi level (EF) aligned to the conduction band minimum (CBM) of both layers is found to be lifted via a band bending which may be attributed to characteristic chemical bonding structures at the interface. The band bending may act as an electron transfer barrier between MAPbI3 and TiO2. Thus, our findings in interfacial electronic structure of MAPbI3 layers on TiO2 will be crucial in understanding its photovoltaic performance." @default.
- W4234311100 created "2022-05-12" @default.
- W4234311100 creator A5007112043 @default.
- W4234311100 creator A5034565742 @default.
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- W4234311100 date "2016-09-26" @default.
- W4234311100 modified "2023-09-27" @default.
- W4234311100 title "Interfacial Electronic Structure of Methylammonium Lead Iodide Grown on a Mesoporous TiO<sub>2</sub> Layer on F-Doped Tin Oxide Substrate" @default.
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- W4234311100 doi "https://doi.org/10.1021/acs.jpcc.6b07476" @default.
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