Enhancing the open circuit voltage of dye sensitized solar cells by surface engineering of silica particles in a gel electrolyte

Lioz Etgar*, Guillaume Schuchardt, Daniele Costenaro, Fabio Carniato, Chiara Bisio, Shaik M. Zakeeruddin, Mohammad K. Nazeeruddin, Leonardo Marchese, Michael Graetzel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

We prepared a quasi-solid electrolyte for dye-sensitized solar cells (DSSCs) that consist of ionic liquid and modified silica particles. Commercial bare silica F5 particles and modified silica F5 by NH2 and NH 3+ groups were prepared, and fully characterized. The best photovoltaic performance was observed using the NH2 modified silica particles giving an open circuit voltage (Voc) of 815 mV, a short-circuit current (Jsc) of 11.23 mA cm-2, and a fill factor (FF) of 0.75 corresponding to an overall power conversion efficiency of 7.04% at 100 mW cm-2 AM 1.5. The modification of the silica particles by NH2 groups increases the Voc of DSSCs by around 60 mV compared to pure ionic liquid electrolyte based DSSCs.

Original languageAmerican English
Pages (from-to)10142-10147
Number of pages6
JournalJournal of Materials Chemistry A
Volume1
Issue number35
DOIs
StatePublished - 21 Sep 2013

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