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Graphene-incorporated Photoelectrodes for Dye-sensitized Solar Cells#
Chuangye Ge,Mohammad Mahbubur Rahman,Narayan Chandra Deb Nath,주명종,노광모,이재준 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.3
Graphene, a single-atom-thick planar sheet of hexagonally arrayed sp2 carbon atoms has attracted significant interest in the last decade in material science and energy related research. In particular, graphene has attracted considerable attention for the development of photoelectrodes of dye-sensitized solar cells (DSSCs). The incorporation of graphene into DSSCs photoelectrodes induced lower recombination, increased electron transport kinetics, enhanced light scattering effect, and concurrently enhanced the power conversion efficiency (PCE). Graphene has been incorporated into the TiO2 either by mixing or as an interfacial layer between TCO|TiO2, TiO2|dye, and TiO2|TiO2. Few studies have demonstrated the incorporation of graphene into ZnO- and NiO-based DSSCs. In all cases, the graphene-incorporated DSSC showed improved PCE. This article reviews the recent advances in the use of graphene as a photoelectrode building material in dye-sensitized solar cells (DSSCs).
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Wang, Jia,Rahman, Md. Mahbubur,Ge, Chuangye,Lee, Jae-Joon Elsevier 2018 Journal of industrial and engineering chemistry Vol.62 No.-
<P><B>Abstract</B></P> <P>This study demonstrated a single-step potentiostatic method for the electrodeposition of copper (I) sulfide (Cu<SUB>2</SUB>S) nanoparticles onto fluorine-doped tin oxide (FTO) electrode from an aqueous solution of CuCl<SUB>2</SUB> and thiourea (TU) to develop counter electrodes (CEs) for quantum-dot sensitized solar cells (QDSSCs). The homogeneously distributed and optimized Cu<SUB>2</SUB>S–CE exhibited an improved catalytic activity in the reduction of polysulfide (S<SUP>2−</SUP>/S<SUB>n</SUB> <SUP>2−</SUP>) electrolyte, which resulted in a power conversion efficiency (PCE) of 4.24% with a short-circuit current density (<I>J<SUB>sc</SUB> </I>), open-circuit voltage (<I>V<SUB>oc</SUB> </I>), and fill factor (<I>FF</I>) of 19.60mA/cm<SUP>2</SUP>, 0.445V, and 48.62%, respectively, for PbS/CdS/ZnS QDs sensitized QDSSCs, while the Pt counterpart exhibited a PCE of 1.17%. The superior photovoltaic performance of this Cu<SUB>2</SUB>S–CEs based QDSSC compared to the Pt counterpart is due to its greater electrocatalytic activity and lower charge transfer resistance (<I>R<SUB>CT</SUB> </I>) at the Cu<SUB>2</SUB>S–CEs/(S<SUP>2−</SUP>/S<SUB>n</SUB> <SUP>2−</SUP>) interface. This strategy provides an effective, low-cost, and non-Pt electrode for QDSSCs, which is promising for other electrochemical applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cu<SUB>2</SUB>S was electrodeposited onto FTO by a single-step potentiostatic method. </LI> <LI> The Cu<SUB>2</SUB>S–CE showed excellent catalytic activity for the reduction of S<SUB>n</SUB> <SUP>2−</SUP>. </LI> <LI> This Cu<SUB>2</SUB>S–CE based QDSSC outperformed the PV performance of a Pt–CE based QDSSC. </LI> <LI> A maximum PCE of 4.24% was attained in a CdS/PbS/ZnS QD-sensitized cell. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Jia Wang,Md. Mahbubur Rahman,Chuangye Ge,이재준 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.62 No.-
This study demonstrated a single-step potentiostatic method for the electrodeposition of copper (I) sulfide (Cu2S) nanoparticles onto fluorine-doped tin oxide (FTO) electrode from an aqueous solution of CuCl2 and thiourea (TU) to develop counter electrodes (CEs) for quantum-dot sensitized solar cells (QDSSCs). The homogeneously distributed and optimized Cu2S–CE exhibited an improved catalytic activity in the reduction of polysulfide (S2−/Sn2−) electrolyte, which resulted in a power conversion efficiency (PCE) of 4.24% with a short-circuit current density (Jsc), open-circuit voltage (Voc), and fill factor (FF) of 19.60 mA/cm2, 0.445 V, and 48.62%, respectively, for PbS/CdS/ZnS QDs sensitized QDSSCs, while the Pt counterpart exhibited a PCE of 1.17%. The superior photovoltaic performance of this Cu2S–CEs based QDSSC compared to the Pt counterpart is due to its greater electrocatalytic activity and lower charge transfer resistance (RCT) at the Cu2S–CEs/(S2−/Sn2−) interface. This strategy provides an effective, low-cost, and non-Pt electrode for QDSSCs, which is promising for other electrochemical applications.
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