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  4. Hydroxamic acid pre-adsorption raises the efficiency of cosensitized solar cells
 
research article

Hydroxamic acid pre-adsorption raises the efficiency of cosensitized solar cells

Ren, Yameng  
•
Zhang, Dan  
•
Suo, Jiajia  
Show more
2023
Nature

Dye-sensitized solar cells (DSCs) convert light into electricity by using photosensitizers adsorbed on the surface of nanocrystalline mesoporous titanium dioxide (TiO2) films along with electrolytes or solid charge-transport materials(1-3). They possess many features including transparency, multicolour and low-cost fabrication, and are being deployed in glass facades, skylights and greenhouses(4). Recent development of sensitizers(5-10), redox mediators(11-13) and device structures(14) has improved the performance of DSCs, particularly under ambient light conditions(14-17). To further enhance their efficiency, it is pivotal to control the assembly of dye molecules on the surface of TiO2 to favour charge generation. Here we report a route of pre-adsorbing a monolayer of a hydroxamic acid derivative on the surface of TiO2 to improve the dye molecular packing and photovoltaic performance of two newly designed co-adsorbed sensitizers that harvest light quantitatively across the entire visible domain. The best performing cosensitized solar cells exhibited a power conversion efficiency of 15.2% (which has been independently confirmed) under a standard air mass of 1.5 global simulated sunlight, and showed long-term operational stability (500 h). Devices with a larger active area of 2.8 cm(2) exhibited a power conversion efficiency of 28.4% to 30.2% over a wide range of ambient light intensities, along with high stability. Our findings pave the way for facile access to high-performance DSCs and offer promising prospects for applications as power supplies and battery replacements for low-power electronic devices(18-20) that use ambient light as their energy source.

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Type
research article
DOI
10.1038/s41586-022-05460-z
Web of Science ID

WOS:000895812700001

Author(s)
Ren, Yameng  
Zhang, Dan  
Suo, Jiajia  
Cao, Yiming  
Eickemeyer, Felix T.  
Vlachopoulos, Nick  
Zakeeruddin, Shaik M.  
Hagfeldt, Anders  
Graetzel, Michael  
Date Issued

2023

Publisher

NATURE PORTFOLIO

Published in
Nature
Volume

613

Start page

60

End page

65

Subjects

Multidisciplinary Sciences

•

Science & Technology - Other Topics

•

dye

•

tio2

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
Available on Infoscience
January 16, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/193790
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