Frontside illuminated TiO2 nanotube dye-sensitized solar cells using multifunctional microchannel array electrodes

Yong Liu; Hai Wang; Ming Li; Ruijiang Hong; Qihong Ye; Jiemin Zheng; Hui Shen
December 2009
Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p233505
Academic Journal
Here we report a frontside illuminated TiO2 nanotube based dye-sensitized solar cell (DSSC). The photoanode with inclined microchannels (IMCs) formed by laser drilling acted as a multifunctional role for enhancing the cell’s efficiency; light trapping, pathway for transporting electrolyte, and extra surface area for dye loading. The amount of N719 dye absorbed on IMCs photoanode was measured to be 3.83×10-7 mol/cm2, which was almost 1.82 times as high as that of the flat photoanode. The frontside illuminated DSSC showed an energy conversion efficiency of 4.1% under AM1.5 condition, which was much higher compared to that (3.1%) of the backside illuminated DSSC.


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