Dye-sensitized Solar Cell utilizing Gold Doped Reduced Graphene Oxide Films Counter Electrode

2018 ◽  
Vol 21 (2) ◽  
pp. 113-117 ◽  
Author(s):  
M. Y.A. Rahman ◽  
A. S. Sulaiman ◽  
A. A. Umar
Keyword(s):  
Graphene Oxide ◽  
Solar Cell ◽  
Reduced Graphene Oxide ◽  
Counter Electrode ◽  
Short Circuit ◽  
Dye Sensitized Solar Cell ◽  
Gold Content ◽  
Transfer Resistance ◽  
Dye Sensitized ◽  
Reduced Graphene

This work is concerned with the use of gold doped reduced graphene oxide (rGO) films as counter electrode in a dye-sensitized solar cell (DSSC). The effect of gold content on the photovoltaic parameters of the device has been studied. The samples are crystalline, indicated by the presence of rGO phase. It was found that the short-circuit current density (JSC) decreases with the increase in gold content. The DSSC utilizing the sample prepared using 2.0 wt.% gold demonstrated the highest JSC, Voc and η of 0.989 mA cm-2, 0.692 V and 0.175%, respectively. The highest efficiency (η) of the device is due to the lowest leak current and charge transfer resistance (Rct).

Investigation on the Performance of Reduced Graphene Oxide as Counter Electrode in Dye Sensitized Solar Cell Applications

2018 ◽  
pp. 1800298 ◽  
Author(s):  
Vijayakumar Paranthaman ◽  
Kannadhasan Sundaramoorthy ◽  
Balaji Chandra ◽  
Senthil Pandian Muthu ◽  
Pandikumar Alagarsamy ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solar Cell ◽  
Reduced Graphene Oxide ◽  
Counter Electrode ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Reduced Graphene

scholarly journals Dye sensitized solar cell (DSC) based on reduced graphene oxide (rGO)-TiO2 nanocomposite photoelectrode and polyaniline (PANI) counter electrode

2020 ◽  
Vol 71 (7) ◽  
pp. 789-801
Author(s):  
T.O. Ahmed ◽  
O.O. Ogunleye ◽  
A.Y. Abdulrahaman ◽  
N. Alu
Keyword(s):  
Graphene Oxide ◽  
Solar Cell ◽  
Current Density ◽  
Counter Electrode ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Reduced Graphene

We report the successful application of reduced graphene oxide–titania (rGO–TiO2) nanocomposite as an efficient photoelectrode and an inexpensive polyaniline (PANI) synthesized by in-situ polymerization on graphite foam as a platinum substitute for tri-iodide reduction for dye‐sensitized solar cell (DSC). The bulk carrier concentration and conductivity of the PANI was measured to be 3.02x1017cm-3 and 4.89x10-1 W-1cm-1 respectively. Subsequently, three DSCs were assembled with rGO–TiO2 nanocomposite photoelectrode and PANI as counter electrode for one and the other two assembled using unmodified TiO2 photoelectrode with PANI and platinum as counter electrodes, respectively. The rGO loading allows more dye to be adsorbed due its large surface area thus improving the light harvesting efficiency (LHE). This improvement in LHE increases the short circuit current density (JSC). The JSC increase is more substantial compared to the reduction in VOC; thus, the increase in the efficiency of the cell with rGO-TiO2 nanocomposite electrode. The short circuit current density for the rGO-TiO2 DSC with PANI counter electrode is 0.45mAcm-2 while that for the unmodified TiO2 DSCs with PANI counter electrode and platinum counter electrode are 0.11mAcm-2 and 0.10 mAcm-2 respectively. This corresponds to 76% increase in the current density and it increases collection rate at the photoelectrode leading to enhanced power conversion efficiency of 0.13% compared with 0.04% and 0.02% for the DSCs assembled with unmodified TiO2 under full sunlight illumination (100 mW/cm2, AM 1.5G) as a result of the better charge collection efficiency of rGO, which reduces the back electron transfer process. This represent 69% enhancement of energy conversion efficiency in the DSC consisting of rGO modified TiO2

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