Visible to near-infrared light harvesting in Ag 2S nanoparticles/ZnO nanowire array photoanodes

Jih-Jen Wu, Ru Chun Chang, Dian Wei Chen, Chun Te Wu

研究成果: Article同行評審

39 引文 斯高帕斯(Scopus)

摘要

Pronounced absorption in the visible-NIR range of 400-1300 nm is demonstrated in the Ag 2S nanoparticles (NPs)/ZnO nanowire (NW) array. ZnO NW arrays are grown on indium tin oxide substrates using chemical bath deposition. The Ag 2S NPs are sequentially formed on the ZnO NWs through sonochemical synthesis. Structural characterizations indicate the slight deconstruction of surface of ZnO NWs during Ag 2S NPs formation. By employing polysulfide electrolyte, short-circuit current (J sc), open-circuit voltage and therefore the efficiency of the Ag 2S NP-sensitized ZnO NW solar cell are improved with increasing the initial sulfur concentration in the sulfur-polysulfide electrolyte. The Ag 2S NP-sensitized ZnO NW solar cell shows a conversion efficiency of 0.49% with a superior J sc of ∼13.7 mA cm -2 under AM 1.5 illumination at 100 mW cm -2. Incident photon conversion efficiency measurements reveal that Ag 2S NPs contribute to 33.4% and 65.2% of J sc in the wavelength ranges of 400-700 nm and 700-1300 nm, respectively.

原文English
頁(從 - 到)1368-1372
頁數5
期刊Nanoscale
4
發行號4
DOIs
出版狀態Published - 2012 二月 21

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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