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  4. A Blue Photosensitizer Realizing Efficient and Stable Green Solar Cells via Color Tuning by the Electrolyte
 
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research article

A Blue Photosensitizer Realizing Efficient and Stable Green Solar Cells via Color Tuning by the Electrolyte

Ren, Yameng  
•
Cao, Yiming  
•
Zhang, Dan  
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April 1, 2020
Advanced Materials

Semitransparent dye-sensitized solar cells (DSCs) are appealing as aesthetically pleasing and colorful see-through photovoltaics. Green semitransparent DSCs have been presented, but the best ones rely on green zinc porphyrin photosensitizers and high volatile electrolytes. For potential outdoor applications, the zinc porphyrin DSCs employing ionic liquid electrolytes merely reached a power conversion efficiency (PCE) of 6.3% even with opaque mesoporous TiO2 films. Herein, the new green DSC is realized by using a blue organic photosensitizer in conjunction with an orange ionic-liquid-based electrolyte, presenting a simple and an effective path for color tuning of photovoltaics. The new approach allows for broadly modulating the color from spring green to cyan by tuning the contributions of the light absorption by the dye-sensitized TiO2 film and the electrolyte layer. The new semitransparent DSCs with spring green to cyan colors have PCEs ranging from 6.7% to 8.1% and show stability for 1000 h under accelerated ageing test at 80 degrees C, superior to the zinc porphyrin DSCs. The findings pave a new way to achieve efficient and stable colorful solar cells.

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Type
research article
DOI
10.1002/adma.202000193
Web of Science ID

WOS:000530300000008

Author(s)
Ren, Yameng  
•
Cao, Yiming  
•
Zhang, Dan  
•
Zakeeruddin, Shaik Mohammed  
•
Hagfeldt, Anders  
•
Wang, Peng
•
Graetzel, Michael  
Date Issued

2020-04-01

Publisher

Wiley-V C H Verlag Gmbh

Published in
Advanced Materials
Volume

32

Issue

17

Article Number

2000193

Subjects

Chemistry, Multidisciplinary

•

Chemistry, Physical

•

Nanoscience & Nanotechnology

•

Materials Science, Multidisciplinary

•

Physics, Applied

•

Physics, Condensed Matter

•

Chemistry

•

Science & Technology - Other Topics

•

Materials Science

•

Physics

•

blue dyes

•

dye-sensitized solar cells

•

ionic liquid electrolytes

•

porphyrin dyes

•

semitransparent solar cells

•

organic-dyes

•

sensitizers

•

stability

•

polymer

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
LSPM  
Available on Infoscience
May 17, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/168788
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