Novel Organic Sensitizers Containing 2,6-Difunctionalized Anthracene Unit for Dye Sensitized Solar Cells

Abstract

A series of new organic dyes comprising different amines as electron donors, 2-(6-substituted-anthracen-2-yl)-thiophene as the π-conjugated bridge, and cyanoacrylic acid group as an electron acceptor and anchoring group, have been synthesized. There exists charge transfer transition from arylamine and anthracene to the acceptor in these compounds, as evidenced from the photophysical measurements and the computational results. Under one sun (AM 1.5) illumination, dye-sensitized solar cells (DSSCs) using these dyes as the sensitizers exhibited efficiencies ranging from 1.62% to 2.88%, surpassing that using 9,10-difunctionalized anthracene-based sensitizer.

Cosensitization of Structurally Simple Porphyrin and Anthracene-Based Dye for Dye-Sensitized Solar Cells

“…These two dyes can be synthesized in four steps at gram scale. In general, zinc porphyrin dyes show a dip in absorption between Soret and Q-bands, which approximately fall at around 500–560 nm, whereas typical anthracene-based D-π-A dyes show strong absorption between 450 and 580 nm. ,− Therefore, a cosensitization of SK6 with CW10 was expected to fill up the absorption dip of SK6 . − Three kinds of devices were fabricated using SK6 , CW10 , and SK6 + CW10 and soaked under AM 1.5G and ambient light (T5 and LED light). The device fabricated using SK6 + CW10 (1:1 ratio) shows PCE of ca.…”

Triple bond-modified anthracene sensitizers for dye-sensitized solar cells: a computational study

“…However, substitution at the 2,6-positions on anthracene is less thermodynamically favorable compared to 9,10-disubstitution, and there are few reports on the incorporation of substituents at the 2,6positions. [21][22][23] Nonetheless, substitution at the 2,6-positions offers lower steric congestion than that seen for 9,10-disubstitution, and generally maintains better planarity with the rest of the conjugated system. A planar structure can provide a broader absorption spectrum, leading to better light harvesting performance.…”

Elucidating the Efficiency of Polymer Solar Cells Based on Dicyano-Substituted Vinylene–Thienothiophenylene–Vinylene–Benzodithiophenylene Copolymers: β-Isomers Outperform α-Isomers

“…The DFT theoretical study not only provides the molecular energy levels but also reveals the dihedral angle and charge distribution , of pBαCN and pBβCN . From the calculated results, both di-BαCN and di-BβCN (see chemical structures displayed under Table ), simulated models of pBαCN and pBβCN , respectively, exhibit similar dihedral angles (Figure center).…”