iO2 纳米线/Sb2S3/CuI/Au 太阳能电池的制备及光电转换性质研究

Sb2S3 is one of the most promising semiconductor materials for photovlotaic cells because of its high absorption coefficient and optimum bandgap. In this paper, we investigated the preparation and performance of TiO2 nanowires/Sb2S3/CuI/Au solar cell。 For the growth of TiO2 nanowires, the titanate nanosheet was employed as seed layer via electrophoretically deposited on FTO substrate. Sb2S3 was deposited on TiO2 nanowires via chemical bath deposition method, and CuI was used as a hole conductor in a TiO2/Sb2S3/CuI/Au solar cell. The TiO2 photoanode was characterized with scanning electron microscopy; The Incident-photon-to-electron conversion efficiency (IPCE) of the solar cell was measured with a monochromator and a Keithley 2400 source meter under monochromatic light irradiation; Current-voltage (I-V) characteristics was measured with the Keithley 2400 source meter under AM 1.5G simulated solar irradiation, giving an overall conversion efficiency of 0.475%. These results indicated that Sb2S3 is an efficient semiconductor sensitizer, and the interfacial charge separation and transfer among the TiO2/Sb2S3/CuI interfaces is capable.