کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1254587 | 971381 | 2016 | 8 صفحه PDF | دانلود رایگان |
A pyridine-anchor co-adsorbent of N,N’-bis((pyridin-2-yl)(methyl) methylene)-o-phenylenediamine (named BPPI) is prepared and employed as co-adsorbent in dye-sensitized solar cells (DSSCs). The prepared co-adsorbent could overcome the deficiency of N719 absorption in the low wavelength region of visible spectrum, offset competitive visible light absorption of I3−, enhance the spectral responses of the co-adsorbed TiO2 film in region from 300 nm to 750 nm, suppress charge recombination, prolong electron lifetime, and decrease the total resistance of DSSCs. The optimized cell device co-sensitized by BPPI/N719 dye gives a short circuit current density of 12.98 mA cm−2, an open circuit voltage of 0.73 V, and a fill factor of 0.66 corresponding to an overall conversion efficiency of 6.22% under standard global AM 1.5 solar irradiation, which is much higher than that of device solely sensitized by N719 (5.29%) under the same conditions. Mechanistic investigations are carried out by various spectral and electrochemical characterizations.
Prepared organic co-adsorbent could notably enhance the overall conversion efficiency of N719 sensitized DSSCs under AM 1.5G solar irradiation.Figure optionsDownload as PowerPoint slide
Journal: Chinese Chemical Letters - Volume 27, Issue 1, January 2016, Pages 127–134