Stable organic dyes based on the benzo[1,2-b:4,5-b′]dithiophene donor for efficient dye-sensitized solar cells

Content Provider	Semantic Scholar
Author	Chen, Yi-Fan Liu, Jun-Min Huang, Jian-Feng Shen, Yong Xiao, Li-Min Kuang, Dai-Bin Su, Cheng-Yong
Copyright Year	2015
Abstract	Two novel arylamine-free organic compounds (CYF1 and CYF2) incorporating a substituted benzo[1,2-b:4,5-b′]dithiophene unit as the electron donor were synthesized and used as sensitizers for dye-sensitized solar cells (DSSCs). The relationship between the chemical structure and photovoltaic performance was investigated. A higher molar absorption coefficient, longer electron lifetime, and larger adsorption amount were observed for sensitizer CYF1, which contains a single π bridge and anchoring unit, compared with CYF2 with twin π bridges and anchoring units. As a result, under standard global AM 1.5 solar conditions, the device based on CYF1 sensitizer gave a higher conversion efficiency of 8.02% than that based on CYF2. This is the highest value for amine-free organic sensitizers with no strong donor units. Moreover, the CYF1- and CYF2-sensitized DSSCs exhibited excellent stability under 1000 W m2 light soaking at 60 °C for 600 h. This is the first example of organic sensitizers based on benzo[1,2-b:4,5-b′]dithiophene donors for efficient dye-sensitized solar cells.
Starting Page	8083
Ending Page	8090
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1039/C5TA00332F
Alternate Webpage(s)	http://www.rsc.org/suppdata/c5/ta/c5ta00332f/c5ta00332f1.pdf
Alternate Webpage(s)	https://pubs.rsc.org/en/content/getauthorversionpdf/C5TA00332F
Alternate Webpage(s)	https://doi.org/10.1039/C5TA00332F
Volume Number	3
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article