Enhancing the Efficiency of DSSCs by the Modification of TiO2 Photoanodes using N, F and S, co-doped Graphene Quantum Dots
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Enhancing the Efficiency of DSSCs by the Modification of TiO2 Photoanodes using N, F and S, co-doped Graphene Quantum Dots
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| Creator |
Kundu, S.
Sarojinijeeva, P. Karthick, R. Anantharaj, G. Bera, R. Anandan, S. Patra, A. Ragupathy, P. Selvaraj, M. Jeyakumar, D. Vijayamohanan, K. Pillai |
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| Subject |
Solar Energy
Electrochemical Materials Science Electrochemical Power Sources |
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| Description |
We report an enhanced power conversion efficiency (PCE) of 11.7%�0.2 and a fill factor (FF) of 71% for dye-sensitized solar cells (DSSC) with an active area of 0.16 cm2 after modifying the TiO2photoanode with
size-selective (ca. 2 nm) N,F,S-codoped graphene quantum dots (NFS-GQDs) that exhibit a photo-
luminescence quantum yield (PLQY) of 70%. An upward shift in the Fermi level has been observed,
perhaps responsible for the improved performance along with the possibility of preventing the back
electron transfer from TiO2. Mott Schottky analysis indicates a shift (52 mV)in the flat band potential,
which is directly related to the Voc of the system. Detailed characterization (IPCE, TCSPC etc) indicates the
important role of hetero atoms in facilitating the enhanced performance. Thus, our results suggest that
the incorporation of size controlled, hetero atom doped GQDs can enhance the efficiency of DSSCs
enabling more opto-electronic applications.
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| Publisher |
Elsevier B.V.
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| Date |
2017-05-08
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3227/1/061-2017.pdf
Kundu, S. and Sarojinijeeva, P. and Karthick, R. and Anantharaj, G. and Bera, R. and Anandan, S. and Patra, A. and Ragupathy, P. and Selvaraj, M. and Jeyakumar, D. and Vijayamohanan, K. Pillai (2017) Enhancing the Efficiency of DSSCs by the Modification of TiO2 Photoanodes using N, F and S, co-doped Graphene Quantum Dots. Electrochim Acta, 242. pp. 337-343. ISSN 0013-4686 |
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| Relation |
http://www.elsevier.com/locate/electacta
http://cecri.csircentral.net/3227/ |
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