Title :
Analysis of carrier transport in dye sensitized solar cells using temperature dependent dark I–V measurements
Author :
Shanmugam, Mariyappan ; Bills, Braden ; Baroughi, Mhadi Farrokh ; Galipeau, David
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., South Dakota State Univ., Brookings, SD, USA
Abstract :
This paper presents carrier transport in dye sensitized solar cell (DSSC) using dark current-voltage-temperature (I-V-T) measurements. Dark I-V measurements were performed in 30°C to 85°C range and the dark saturation current of the DSSC was extracted. The measurements revealed that the activation energy of the dark current lies in 1.18-1.27 eV range. This suggests that the charge injection from TiO2 into liquid electrolyte is dominated by electron capture process from TiO2 conduction band into the surface states with energy levels close to the electrolytes redox potential.
Keywords :
charge injection; conduction bands; dark conductivity; dyes; electrolytes; electron capture; liquids; oxidation; reduction (chemical); solar cells; surface states; titanium compounds; TiO2; activation energy; carrier transport; charge injection; conduction band; dark current-voltage-temperature measurements; dark l-V measurements; dark saturation current; dye sensitized solar cell; electron capture; energy levels; liquid electrolyte; redox potential; surface states; temperature 30 degC to 85 degC; Current measurement; Dark current; Decision support systems; Energy measurement; Energy states; Performance evaluation; Photovoltaic cells; Radioactive decay; Temperature dependence; Temperature sensors;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2009 34th IEEE
Conference_Location :
Philadelphia, PA
Print_ISBN :
978-1-4244-2949-3
Electronic_ISBN :
0160-8371
DOI :
10.1109/PVSC.2009.5411512
