Article (Scientific journals)
Remarkable 8.3% efficiency and extended electron lifetime towards highly stable semi-transparent iodine-free DSSCs by mitigating the in-situ triiodide generation
Bharwal, Anil Kumar; Manceriu, Laura; Olivier, Celine et al.
2022In Chemical Engineering Journal, 446, p. 136777
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Keywords :
Enhanced electron lifetime; I2-free quasi-solid-state DSSCs; In-situ tri-iodide generation; Long-term stability; Semi-transparency; Dye- sensitized solar cells; Electron lifetime; Ethylene carbonate; Highly stables; I2-free quasi-solid-state dye-sensitized solar cell; Long term stability; Quasi-Solid-State dye-sensitized solar cells; Semi transparencies; Chemistry (all); Environmental Chemistry; Chemical Engineering (all); Industrial and Manufacturing Engineering; General Chemical Engineering; General Chemistry
Abstract :
[en] Achieving highly stable and efficient dye-sensitized solar cells (DSSCs) remains a major challenge for future industrial development. In the present work, a series of ionic conductors, such as ionic liquids (ILs), polysiloxane-based poly(ionic liquid)s (PILs), and their blends are employed as electrolytes in quasi-solid-state DSSCs. In particular, we study the effect of PILs ionic functionality interaction with the ILs and ethylene carbonate (EC) on the photovoltaic performance of DSSCs with and without iodine (I2). Omitting I2 from the electrolytes in fabricated DSSCs enhances both Voc and Jsc due to the reduced charge recombination and extended effective electron lifetime. We confirm through Raman spectroscopy that in I2-free DSSCs, the in-situ generated tri-iodides (I3−) ions are sufficient enough to complete the reaction mechanism. Additionally, the I2-free DSSCs exhibit enhanced transparency, encouraging our efforts towards BIPV suitable applications. When plasticized with EC, the ionic conductivities of the highly functionalized I2-free PIL-based DSSCs exceeds 10−3 S cm−1 at 30 °C, giving record PCE of 8.3% and 9.1% under standard (1 sun) and modest (0.3 sun) illumination, respectively. These devices also show excellent long-term stability, retaining about 84% of their initial efficiency after 26 months.
Disciplines :
Chemistry
Author, co-author :
Bharwal, Anil Kumar;  GREENMAT, CESAM Research Unit, University of Liège, Department of Chemistry, Liège, Belgium ; Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, Grenoble, France ; Aix-Marseille Université, Université de Toulon, IM2NP, UMR 7334 CNRS, Marseille, France
Manceriu, Laura  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale et Chimie des matériaux inorganiques (LCIS-GreenMAT)
Olivier, Celine ;  Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, Cédex, France
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale et Chimie des matériaux inorganiques (LCIS-GreenMAT)
Iojoiu, Cristina ;  Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, Grenoble, France
Toupance, Thierry;  Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, Cédex, France
Ruiz, Carmen M.;  Aix-Marseille Université, Université de Toulon, IM2NP, UMR 7334 CNRS, Marseille, France
Pasquinelli, Marcel;  Aix-Marseille Université, Université de Toulon, IM2NP, UMR 7334 CNRS, Marseille, France
Duché, David;  Aix-Marseille Université, Université de Toulon, IM2NP, UMR 7334 CNRS, Marseille, France
Simon, Jean-Jacques;  Aix-Marseille Université, Université de Toulon, IM2NP, UMR 7334 CNRS, Marseille, France
Henrist, Catherine ;  Université de Liège - ULiège > Département de chimie (sciences)
Alloin, Fannie;  Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, Grenoble, France
Language :
English
Title :
Remarkable 8.3% efficiency and extended electron lifetime towards highly stable semi-transparent iodine-free DSSCs by mitigating the in-situ triiodide generation
Publication date :
15 October 2022
Journal title :
Chemical Engineering Journal
ISSN :
1385-8947
eISSN :
1873-3212
Publisher :
Elsevier B.V.
Volume :
446
Pages :
136777
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
The research was supported by ARC4-Énergies Région, Rhône-Alpes. The authors would also like to acknowledge IDS FunMAT (International Doctorate School in Functional Materials) and the Centre of Excellence of Multifunctional Architectured Materials “CEMAM” n° AN-10-LABX-44-01 for financial support. Electron microscopy studies were performed at the CAREM facility (Celluled'Appui à la Recherche et à l'Enseignement en Microscopie -ULiège).
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