title: A sulfide/polysulfide-based ionic liquid electrolyte for quantum dot-sensitized solar cells.
abstract: Further development of quantum dot-sensitized solar cells (QDSCs) will require long-term stability in addition to the continuous increase of photovoltaic (PV) conversion efficiency achieved in the last years. We report a robust S(2-)/S(n)(2-) electrolyte that has been specifically designed for compatibility with CdSe quantum dots in sensitized solar cells. The new pyrrolidinium ionic liquid reaches 1.86% efficiency and a short-circuit current close to 14 mA·cm(-2) under air-mass 1.5 global illumination and improves the device lifetime with good photoanode stability over 240 h. PV characterization showed that the solar cell limitations relate to poor catalysis of regeneration at the counter electrode and high recombination. Further improvement of these factors in the robust electrolyte configuration may thus have a significant impact for advancing the state-of-the-art in QDSCs.
authors: CIDETEC-IK4, Paseo Miramón 196, 20009 Donostia/San Sebastian, Spain.
authors: Vasko
authors: V
authors: Jovanovski
authors: Victoria
authors: V
authors: González-Pedro
authors: Sixto
authors: S
authors: Giménez
authors: Eneko
authors: E
authors: Azaceta
authors: Germán
authors: G
authors: Cabañero
authors: Hans
authors: H
authors: Grande
authors: Ramon
authors: R
authors: Tena-Zaera
authors: Iván
authors: I
authors: Mora-Seró
authors: Juan
authors: J
authors: Bisquert