Fig. 1: Characterization and VOC of TiO2/CdS. | Nature Communications

Fig. 1: Characterization and VOC of TiO2/CdS.

From: Faradaic junction and isoenergetic charge transfer mechanism on semiconductor/semiconductor interfaces

Fig. 1

a A TEM image of TiO2/CdS, (b) XPS spectra of O 1 s of TiO2/CdS, (c) Mott–Schottky plots of TiO2 and CdS in 1 M Na2S aqueous solution, (d) band positions of a TiO2/CdS heterojunction and redox potential of S2−/S, (e) a schematic diagram of a TiO2/CdS quantum-dot-sensitized solar cell, and (f) I–V curves of TiO2/CdS quantum-dot-sensitized solar cells under illumination and in the dark. Electrolyte: 0.5 M Na2S, 2 M S, and 0.2 M KCl in water/methanol (3:7 by volume). Light source: a Xe lamp with an AM 1.5 sunlight-simulator filter, light intensity: 100 mW/cm2.

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