Energy Level Alignment at Interfaces in Metal Halide Perovskite Solar Cells

Adv. Mater. Interfaces 2018, 5, 1800260 In the initially published version of this article, one word on the second page was wrong, the positions of the symbols “HOMO” and “LUMO” were misplaced in Figure 2 and the subparts in caption of figure 20 weren't identified correctly. Please find the correct sentence, Figure 2 and the caption of figure 20 below. The authors apologize for any inconvenience or misunderstanding this may have caused. The third sentence in paragraph 2 on page 2 is corrected as follows: When an organic layer contacts with metal, if vacuum level aligns, one can estimate the energy offsets at the organic/metal interface (e.g., the energy offset between the HOMO of spiro-OMeTAD and the Fermi level of Au) by simply comparing the ionization potential of bulk organic material and the work function (WF) of metal (as shown in the subpanel (i) of Figure 2b). Figure 20. UPS results of the as-prepared doped spiro-MeOTAD films and the films exposed to a) only H2O vapor (a relative humidity of 90%; which is generated by letting a stream of dry N2 gas flow through an H2O bubbler), b) only O2 (>99.5 of purity), and c) ambient air (a relative humidity of 50%) for 0, 3, 6, 18, and 39 h. The UPS spectra are shown in (i) and the corresponding energy level diagrams of them are shown in (ii), respectively. The substrate for UPS measurements is Si/Au. a,b) Reproduced with permission.[54] Copyright 2016, Wiley-VCH Verlag GmbH & Co. KGaA (c) Reproduced with permission.[88] Copyright 2015, Royal Society of Chemistry.