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Quasi-solid state electrolyte for semi-transparent bifacial dye-sensitized solar cell with over 10% power conversion efficiency

Title
Quasi-solid state electrolyte for semi-transparent bifacial dye-sensitized solar cell with over 10% power conversion efficiency
Authors
Hwang, Dae-KueNam, Jung EunJo, Hyo JeongSung, Shi-Joon
DGIST Authors
Hwang, Dae-Kue; Sung, Shi-Joon
Issue Date
2017
Citation
Journal of Power Sources, 361, 87-95
Type
Article
Article Type
Article
Keywords
Bifacial Solar CellDye Sensitized Solar CellPolymer Gel ElectrolyteQuasi Solid State Electrolyte
ISSN
0378-7753
Abstract
In traditional dye-sensitized solar cells (DSSCs), the liquid electrolyte (LE) presents a problem for long-term stability. Herein, we demonstrate a bifacial DSSC by combining a new metal-free organic dye and a quasi-solid state electrolyte (QSSE) that contains poly(vinylidenefluoride-co-hexafluoropropylene) (PVdF-HFP)-based polymer gel. The incident light irradiates the front side of the DSSC, and the transmitted light is reused after reflection on the back side. Owing to the semi-transparent DSSC electrode, the reflected light can penetrate and be absorbed by the dye molecules in the DSSC, thereby enhancing the short-circuit current density and thus the overall power conversion efficiency (PCE). The PCE for the DSSC device with QSSE from bifacial irradiation is 10.37%, a value that is comparable to that obtained with LE-based DSSC (9.89%). The stability of the device is enhanced when the polymer gel containing PVdF-HFP is mixed with the LE, and the effectiveness of PVdF-HFP as a gelator is attributed to its interaction with the Li+ ions. Based on our preliminary results, this architecture can lead to more stable bifacial QSSE-based DSSCs without sacrificing the photovoltaic performance. © 2017 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/5036
DOI
10.1016/j.jpowsour.2017.06.067
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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