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> (2018) Comprehensiv control of voltage loss enable, 11.7% efficient solid-state DSSC
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(2018) Comprehensive control of voltage loss enables 11.7% efficient solid-state dye-sensitized solar cells
Источники:
- https://pubs.rsc.org/en/content/articleland...#33;divAbstract
- http://photochemistry.epfl.ch/reprints/EES1101.pdf
- Energy Environ. Sci.,2018,11, 1779

DOI: 10.1039/c8ee00661j

Авторы: Weiwei Zhang,abYongzhen Wu,*aHee Won Bahng,cYiming Cao,bChenyi Yi,bYasemin Saygili,dJingshan Luo,bYuhang Liu,bLadislav Kavan,beJacques-E. Moser,cAnders Hagfeldt,dHe Tian,aShaik Mohammed Zakeeruddin,*bWei-Hong Zhu*aand Michael Gra ̈tzel*b

QUOTE
The relatively large voltage loss (Vloss) in excitonic type solar cells severely limits their power conversion efficiencies (PCEs). Here, we report a comprehensive control of Vloss through efficacious engineering of the sensitizer and redox mediator, making a breakthrough in the PCE of dye-sensitized solar cells (DSSCs). The targeted down-regulation of Vlossis successfully realized by three valid channels: (i) reducing the driving force of electron injection through dye molecular engineering, (ii) decreasing the dye regeneration over potential through redox mediator engineering, and (iii) suppressing interfacial electron recombination.Significantly, the ‘‘trade-off’’ effect between the dye optical band gap and the open-circuit voltage (VOC) is minimized to a great extent, achieving a distinct enhancement in photovoltaic performance (PCE4 11.5% with VOC up to 1.1 V) for liquid junction cells. The solidification of the best-performing device leads to a PCE of 11.7%, which is so far the highest efficiency obtained for solid-state DSSCs. Our work inspiresfurther development in highly efficient excitonic solar cells by comprehensive control of Vloss.


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