期刊
ADVANCED ENERGY MATERIALS
卷 4, 期 9, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201301564
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资金
- National Natural Science Foundation of China [51072170, 21021002]
- National Basic Research Program of China [2012CB932900]
Hierarchical Cu2S microspheres wrapped by reduced graphene oxide (RGO) nanosheets are prepared via a one-step solvothermal process. The amount of graphene oxide used in the synthesis process has a remarkable effect on the features of Cu2S microspheres. Compared to Pt and Cu2S electrodes, RGO-Cu2S electrodes show better electrocatalytic activity, greater stability, lower charge-transfer resistance, and higher exchange current density. As expected, RGO-Cu2S electrodes exhibit superior performance when functioning as counter electrodes in CdS/CdSe quantum-dot sensitized solar cells (QDSSCs) using a polysulfide electrolyte. A power conversion efficiency up to 3.85% is achieved for the QDSSC employing an optimized RGO-Cu2S counter electrode, which is higher than those of the QDSSCs featuring Pt (2.14%) and Cu2S (3.39%) counter electrodes.
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