The electrolyte is one of the crucial components in dye sensitized solar cells (DSSCs), allowing for fast diffusion of charge carriers between the electrodes and directly affecting photocurrent density (JSC), photovoltage (VOC), and fill factor (FF). Quasi-solid state DSSC electrolytes typically ensure mechanical properties of a solid and diffusive property of a liquid, circumventing practical problems such as solvent volatility, leakage, photodegradation and corrosion of counter electrode. In this study, a polyethylene glycol dimethyl ether (PEGDME, Mw = 150 g mol-1) based I-/I3- electrolyte containing mesoporous SiO2 particles (MSU-H, 15 nm pores) is investigated in terms of ionic conduction and DSSC performance. Similarly as in “soggy sand” electrolytes, preferential adsorption of anions is observed by Zeta potential measurements and ionic conductivity of the liquid electrolyte can be enhanced. High values of photovoltaic parameters at 1 sun irradiation (JSC = 11.5 mA cm‒2, VOC = 0.69 V, FF = 0.47, 6.3% efficiency) at 3.8 vol % SiO2 suggests an improved regeneration kinetics of the dye molecules. Transient photocurrent experiments confirmed favorable mass transport. A remarkably high 14.3% efficiency was measured under 0.2 sun irradiation.

Interfacial effects in solid-liquid glyme electrolytes for improved performance of DSSCs / Bella, Federico; Popovic, J.; Maier, J.; Gerbaldi, Claudio. - STAMPA. - (2017), pp. 591-591. (Intervento presentato al convegno 21st International Conference of Solid State Ionics (SSI-21) tenutosi a Padua (Italy) nel June 18-23 2017).

Interfacial effects in solid-liquid glyme electrolytes for improved performance of DSSCs

BELLA, FEDERICO;GERBALDI, CLAUDIO
2017

Abstract

The electrolyte is one of the crucial components in dye sensitized solar cells (DSSCs), allowing for fast diffusion of charge carriers between the electrodes and directly affecting photocurrent density (JSC), photovoltage (VOC), and fill factor (FF). Quasi-solid state DSSC electrolytes typically ensure mechanical properties of a solid and diffusive property of a liquid, circumventing practical problems such as solvent volatility, leakage, photodegradation and corrosion of counter electrode. In this study, a polyethylene glycol dimethyl ether (PEGDME, Mw = 150 g mol-1) based I-/I3- electrolyte containing mesoporous SiO2 particles (MSU-H, 15 nm pores) is investigated in terms of ionic conduction and DSSC performance. Similarly as in “soggy sand” electrolytes, preferential adsorption of anions is observed by Zeta potential measurements and ionic conductivity of the liquid electrolyte can be enhanced. High values of photovoltaic parameters at 1 sun irradiation (JSC = 11.5 mA cm‒2, VOC = 0.69 V, FF = 0.47, 6.3% efficiency) at 3.8 vol % SiO2 suggests an improved regeneration kinetics of the dye molecules. Transient photocurrent experiments confirmed favorable mass transport. A remarkably high 14.3% efficiency was measured under 0.2 sun irradiation.
2017
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2677847
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