High performance organic photosensitizers for dye-sensitized solar cells

Abstract

We report highly efficient organic photosensitizers containing pi-conjugated alkoxy-substituted oligophenylenevinylene linkers with electron donor-acceptor units for dye-sensitized solar cells. TA-DM-CA showed an overall solar-to-energy conversion efficiency of 9.67% at AM 1.5 illumination (100 mW cm(-2)).

A perspective on using experiment and theory to identify design principles in dye-sensitized solar cells

“…The combination of these factors makes these dyes less desirable for the industrial production of DSC devices [24]. These problems have led to the development of many new organic dyes including triarylamines [25–27], coumarins [28], cyanines [29], indolines [30,31], squaraines [32–34], quinoxalines [35] and natural dyes [36]. These organic dyes are designed with a donor-ᴨ-linker-acceptor (D-π-A) structural arrangement, and absorb in the same region as Ru-by dyes.…”

Efficient dye-sensitized solar cells with triarylamine organic dyes featuring functionalized-truxene unit

“…Various kinds of metal-free organic dyes with D--A structure such as coumarin [6], indoline [7], triphenylamine [8], dialkylaniline [9], bis(dimethylfluorenyl) aminophenyl [10], merocyanine [11], hemicyanine [12], and carbazole [13] have been investigated as sensitizers for DSSCs. And impressive device efficiencies of 9.7-10.3% have been achieved based on organic dyes [14,15]. However, it is still needed to optimize the chemical structures of organic dyes for further improvement on performances in the DSSCs.…”

Organic Sensitizers with Bridged Triphenylamine Donor Units for Efficient Dye‐Sensitized Solar Cells

“…[ 16 ] Among various organic dyes, triphenylamine (TPA) is one of the most popular donor moieties as it is able to restrict recombination between photoelectrons and the oxidized sensitizer. [ 17 ] Recently, chemical modifi cations of TPA units have been employed to further fi ne-tune the physical and optical properties of sensitizers. Introduction of alkoxy and aromatic groups to TPA units was reported to fi ne tune energy levels, red-shift the absorption spectra of sensitizers and enhance their light harvesting effi ciency, resulting in improved photocurrent and device effi ciencies.…”