Cyanomethylbenzoic Acid: An Acceptor for Donor–π–Acceptor Chromophores Used in Dye‐Sensitized Solar Cells

Abstract

Sensing the sun: Incorporation of a cyanomethyl benzoic acid electron acceptor into donor-π-acceptor sensitizers for dye-sensitized-solar cell is shown to lead to devices with improved conversion efficiency when compared with more widely used cyanoacetic acid acceptor.

Conjoint use of Dibenzosilole and Indan‐1,3‐dione Functionalities to Prepare an Efficient Non‐Fullerene Acceptor for Solution‐Processable Bulk‐Heterojunction Solar Cells

“…This slight bathochromic shift can be attributed to either uneven surface morphology or film thickness at an incident point on the blend surface. Such divergent variations in solution‐processable thin film devices are also common in similar types of photochemical cells where multiple conducting surfaces are coated on top of each other . However, in view of this broad IPCE, good optical profile, and appropriately positioned energy levels, it is anticipated that N5 can also be a suitable acceptor for other electron‐donating, low‐band gap, conjugated polymers and small‐molecule solids.…”

Small molecules containing rigidified thiophenes and a cyanopyridone acceptor unit for solution-processable bulk-heterojunction solar cells

“…Knoevenagel condensation of the aldehyde groups present on the oligothiophenes is an efficient way of generating a double bond between the π-bridge and an acceptor unit. The use of such condensations is a common strategy to generate metal-free organic dyes for dye-sensitized solar cells [33]. However, the use of the same strategy to develop materials for BHJ photovoltaic devices has been limited [9,10].…”

Insertion of a naphthalenediimide unit in a metal-free donor–acceptor organic sensitizer for efficiency enhancement of a dye-sensitized solar cell

“…Others [6] and we [30] have demonstrated that DSSCs based on such electrolyte systems can reach high conversion efficiencies, especially when used in-conjunction with organic sensitizers. Keeping this criterion in mind and to show the suitability of our new sensitizer with a variety of redox shuttles, we further used cobalt-mediated electrolyte (CE) to construct DSSC devices.…”

“…The details of working and counter electrodes preparation, cell assembly, DSSC device fabrication and characterization, and IMVS and IMPS experimental have been reported previously [22,23,30].…”

“…Research concerning organic D-π-A dyes has M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT customarily focused on the π-conjugated spacer units which can facilitate charge transfer and can increase light absorption over the visible range, in some cases into the near infra-red (IR) region. Therefore, several kinds of electron-rich functionalities have been used into the π-linkers, such as thiophene [25][26][27], thienothiophene [28][29], 3,4-ethylenedioxythiophene [8], dithienosilole [30], and dithienopyrrole [31] to name a few. While this progress is encouraging, ample scope still exists to develop new organic sensitizers that possess broad and efficient optical absorption, narrow band-gaps and adequate solubility for DSSC fabrication.…”