TY - JOUR
T1 - Modifying the Semiconductor/Electrolyte Interface in CuO p-Type Dye-Sensitized Solar Cells
T2 - Optimization of Iodide/Triiodide-Based Electrolytes
AU - Langmar, Oliver
AU - Ganivet, Carolina R.
AU - Scharl, Tobias
AU - De La Torre, Gema
AU - Torres, Tomás
AU - Costa, Rubén D.
AU - Guldi, Dirk M.
N1 - Publisher Copyright:
© Copyright 2018 American Chemical Society.
PY - 2018/11/26
Y1 - 2018/11/26
N2 - Studies related to novel electrolyte concepts for p-type dye-sensitized solar cells (p-DSSCs) set focus on developing alternatives to the iodide/triiodide (I-/I3-) redox couples, while attempts to improve the performance of the latter are scarce. In this study, we report on the first complete optimization of an I-/I3--based electrolyte for p-DSSCs employing CuO-based photocathodes. Optimization of the electrolyte solvent, the effect of ionic liquids, and the concentration-dependent properties of various electrolyte additives were at the focal point. Electrochemical impedance spectroscopy and intensity-modulated photovoltage and photocurrent spectroscopies complemented basic electrochemical and device characterization, leading to a sound understanding of charge injection, charge recombination, and charge transport. To this end, optimization of the aforementioned parameters enabled 2-fold device efficiencies of 0.156% compared to 0.078% for nonoptimized devices.
AB - Studies related to novel electrolyte concepts for p-type dye-sensitized solar cells (p-DSSCs) set focus on developing alternatives to the iodide/triiodide (I-/I3-) redox couples, while attempts to improve the performance of the latter are scarce. In this study, we report on the first complete optimization of an I-/I3--based electrolyte for p-DSSCs employing CuO-based photocathodes. Optimization of the electrolyte solvent, the effect of ionic liquids, and the concentration-dependent properties of various electrolyte additives were at the focal point. Electrochemical impedance spectroscopy and intensity-modulated photovoltage and photocurrent spectroscopies complemented basic electrochemical and device characterization, leading to a sound understanding of charge injection, charge recombination, and charge transport. To this end, optimization of the aforementioned parameters enabled 2-fold device efficiencies of 0.156% compared to 0.078% for nonoptimized devices.
KW - copper(II) oxide
KW - electrochemical impedance spectroscopy
KW - electrolyte optimization
KW - p-type dye-sensitized solar cell
KW - photocathode
UR - http://www.scopus.com/inward/record.url?scp=85057872508&partnerID=8YFLogxK
U2 - 10.1021/acsaem.8b01370
DO - 10.1021/acsaem.8b01370
M3 - Article
AN - SCOPUS:85057872508
SN - 2574-0962
VL - 1
SP - 6388
EP - 6400
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 11
ER -