Efficient azobenzene co-sensitizer for wide spectral absorption of dye-sensitized solar cells. Issue 12 (7th February 2018)

• Record Type: Journal Article
• Authors: Zhang, L. Y.; Zou, S. J.; Sun, X. H.
• Is Part Of: RSC advances. Volume 8:Issue 12(2018)
• Page Start: 6212
• Page End: 6217
• Publication Date: 2018-02-07
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra12229b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The combination of two azobenzene dyes leads to a wide spectral absorption and overall light conversion efficiency of 7.1%. Abstract : Two azobenzene dyes, [Cu(azobenzene-4, 4′-dicarboxylate) diethylenediamine] n (ADD ), [Cd(4, 4′-diazenediyldibenzoato)(H2 O)] n (DDB ), have been designed, synthesized, and characterized as efficient co-sensitizers for dye-sensitized solar cells (DSSC). The optical, charge-transfer, electrochemical and photovoltaic properties ofADD andDDB are investigated by UV-visible spectroscopy, transient surface photovoltage measurement, cyclic voltammetry, and photocurrent–photovoltage measurement. The combination ofADD andDDB in DSSC leads to a wide spectral absorption over the whole visible range (350–700 nm). DSSC withADD andDDB exhibits a short-circuit photocurrent density as high as 16.96 mA cm −2, open-circuit photovoltage of 0.73 V, a fill factor of 0.57, and overall light conversion efficiency of 7.1% under standard global AM1.5 solar irradiation conditions.