ae9b02406_si_001.pdf (2.72 MB)
Efficient Anthryl Dye Enhanced by an Additional Ethynyl Bridge for Dye-Sensitized Module with Large Active Area to Drive Indoor Appliances
journal contribution
posted on 2020-03-06, 15:37 authored by Ming-Chi Tsai, Yi-Chieh Chiu, Ming-De Lu, Yung-Liang Tung, Hung-Cheng Tsai, Jia-Ren Chang Chien, Ching-Yao LinFor
applications, having efficient modules with a large active
area is paramount. In this work, two series of anthryl dyes were synthesized
to study their fundamental properties and photovoltaic performance
in dye-sensitized cells. After screening and optimization, a module
sensitized with one of the dyes exhibits an overall efficiency of
13.48%, and it is capable of driving prototype application devices
under indoor conditions. Chemical structures of the dyes are based
on our previous champion anthryl dye (N,N-dioctyl-anilinyl-ethynyl-anthryl-ethynyl-benzothiodiazoyl-benzoic
acid or AN-11, 11.94%). The first series consists of AN-11 as a reference
and two other dyes bearing either an isophthalic acid (AN-11D) or
a hydroxamic acid (AN-11H). For the second series of the dyes, their
chemical structures differ from the first series counterparts in an
additional ethynyl bridge between the benzothiadiazole acceptor and
the anchoring group. As expected, the second series of the dyes give
rise to red-shifted UV–visible absorptions, fluorescence emissions,
and positively shifted reduction potentials. Significantly, the AN-21
module outperforms others with an overall efficiency of 13.48% under
1000 lx of T5 fluorescent light. Appearance-wise, the color of the
AN-21 module is darker than that of the already very dark AN-11 module,
owing to its broader and more intense incident photon-to-current conversion
efficiency (IPCE) spectrum. Finally, we prepared three prototype appliances
to showcase the AN-21 module’s ability of driving/powering
real-life indoor applications.