A series of push-pull triarylamine organic dyes containing the benzo[1,2-b:4,5-b′]dithiophene unit as a spacer and bearing alkyl chains in different positions of the molecule were synthesized. The new dyes 1-4 were characterized by optical and electrochemical measurements and density functional theory calculations and used as sensitizers in liquid dye-sensitized solar cells. The effect of alkyl chain position on dye properties and performances was investigated and dye 1, bearing two 3,7-dimethyloctyl groups on the benzodithiophene core, exhibited the best behaviour in term of light absorption and cell performance (PCE of 6.6%, to be compared with a PCE of 8.1% for N719-based device). The efficiency of the DSSC was highly dependent on the solvent used for the dye-sensitizing bath, which affects the position of the COOH/COO- equilibrium.

Baldoli, C., Bertuolo, S., Licandro, E., Viglianti, L., Mussini, P., Marotta, G., et al. (2015). Benzodithiophene based organic dyes for DSSC: Effect of alkyl chain substitution on dye efficiency. DYES AND PIGMENTS, 121, 351-362 [10.1016/j.dyepig.2015.04.028].

Benzodithiophene based organic dyes for DSSC: Effect of alkyl chain substitution on dye efficiency

MANCA, PAOLA;MANFREDI, NORBERTO
Penultimo
;
ABBOTTO, ALESSANDRO
Ultimo
2015

Abstract

A series of push-pull triarylamine organic dyes containing the benzo[1,2-b:4,5-b′]dithiophene unit as a spacer and bearing alkyl chains in different positions of the molecule were synthesized. The new dyes 1-4 were characterized by optical and electrochemical measurements and density functional theory calculations and used as sensitizers in liquid dye-sensitized solar cells. The effect of alkyl chain position on dye properties and performances was investigated and dye 1, bearing two 3,7-dimethyloctyl groups on the benzodithiophene core, exhibited the best behaviour in term of light absorption and cell performance (PCE of 6.6%, to be compared with a PCE of 8.1% for N719-based device). The efficiency of the DSSC was highly dependent on the solvent used for the dye-sensitizing bath, which affects the position of the COOH/COO- equilibrium.
Articolo in rivista - Articolo scientifico
Benzodithiophene; Cyclic voltammetry; DFT-TDDFT; Dye sensitized solar cells; Push-pull dyes; Solvent effects;
English
ott-2015
2015
121
351
362
partially_open
Baldoli, C., Bertuolo, S., Licandro, E., Viglianti, L., Mussini, P., Marotta, G., et al. (2015). Benzodithiophene based organic dyes for DSSC: Effect of alkyl chain substitution on dye efficiency. DYES AND PIGMENTS, 121, 351-362 [10.1016/j.dyepig.2015.04.028].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/94682
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