Novel extended π-conjugated Zn(II)-porphyrin derivatives bearing pendant triphenylamine moiety for dye-sensitized solar cell: synthesis and characterization

Abstract

We have designed and synthesized novel Zn(II)-porphyrin derivatives for dye-sensitized solar cells. The derivatives incorporate the electron-donating group of a pendant triphenylamine into cyano-substituted ([TPA]Zn-Por-CN1) or non-substituted stilbene moiety ([TPA]Zn-Por1) in the 5,10,15-meso-position and carboxylic acid group in the 20-meso-position in a porphyrin derivative. Their chemical structures were characterized by 1 H NMR, FT-IR, UV-vis absorption, EI-mass, and MALDI-TOF mass spectroscopies. Their electrochemical properties were studied by cyclic voltammetry measurement. These Zn(II)-porphyrin derivatives have been used to fabricate dye-sensitized solar cells based on I -/I 2 liquid electrolytes as dye sensitizers and their device performances were evaluated by comparing with that of a standard Ru(II) complex dye.[TPA]Zn-Por-CN1 showed higher power conversion effi ciency than that of [TPA]Zn-Por1, due to a broader absorption band around 435 nm. Short-circuit photocurrent density (J sc ), open-circuit voltage (V oc ), fi ll factor (FF), and power conversion effi ciency (η) of DSSC for [TPA]Zn-Por-CN1 were evaluated to be J sc = 6.3 mA.cm -2 , V oc = 0.737 V, FF = 0.683, and η = 3.1%, respectively.

A simple triaryl amine-based dual functioned co-adsorbent for highly efficient dye-sensitized solar cells

“…Dye-sensitized solar cells (DSSCs), 1 mainly composed of dyesensitizer, wide band gap semiconductor oxide, redox electrolyte and counter electrode, have been intensively studied and developed because of their relatively high solar-to-electricity conversion efficiency and low cost. [2][3][4][5][6][7][8][9][10][11] DSSCs employing Ru-sensitizers have shown the highest h value of over 11%. 12 However, in view of the cost and environmental demand, organic dyes have attracted much attention due to their many advantages over Rudyes, such as diversity of molecular structures, high molar extinction coefficient, and simple synthesis.…”