Figure 4 | Scientific Reports

Figure 4

From: Energy barrier at the N719-dye/CsSnI3 interface for photogenerated holes in dye-sensitized solar cells

Figure 4

Experimental determination of the HOMO and LUMO energy levels of the N719 dye.

(a) UPS pattern of N719 indicating the HOMO energy level of −5.34 eV below the vacuum level, (b) Normalized UV-visible absorption spectrum of N719 in ethanol which provides an estimation of the band gap of N719 and (c) Cyclic voltammograms of the N719 dye in DMF measured at a scan rate of 50 mV/s.

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