کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1550944 | 998112 | 2012 | 9 صفحه PDF | دانلود رایگان |

Stand-alone graphene-based films were prepared from graphene oxide (GO) nanoplatelets and their use as counter-electrodes (CEs) in dye-sensitized solar cells (DSCs) was investigated. The graphene-based CEs were produced by spray deposition of GO and chemically reduced GO, followed by thermal annealing under an inert atmosphere. These GO-based CEs were shown to have similar transparency as a reference CE made of Pt. Consistent with impedance data from symmetrical half-cells, DSCs assembled with such GO-based CEs exhibited relative efficiencies of ca. 75% comparatively to the reference Pt CE. The possibility of obtaining transparent (transmittance higher than 80%) and reasonable catalytic films for DSCs (energy conversion efficiency of 2.64%) from GO nanoplatelets was demonstrated. The need for reduction of the graphene oxide nanoplatelets prior to deposition was not observed, allowing for a simplified CE manufacturing process. However, further work is still needed to equal or surpass the performance of Pt CEs.
► We study graphene oxide (GO)-based materials as transparent counter electrodes for dye-sensitized solar cells.
► GO displays the same performance as chemically pre-reduced GO but ca. 25% less comparatively to Pt.
► As such, a cheaper and easier manufacturing process is demonstrated.
Journal: Solar Energy - Volume 86, Issue 2, February 2012, Pages 716–724