Influence of Mg-doping on the characteristics of ZnO photoanodes in dye-sensitized solar cells
Dye-sensitized solar cells (DSSCs) based on ZnO photoanodes have, despite extensive research, lagged behind cells based on TiO 2 , which is due to generally lower open-circuit voltages V OC and fill factors. Here, DSSCs have been prepared using Mg-doped ZnO (MZO) photoanodes based on nanoparticles,...
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Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2021-04, Vol.23 (14), p.8393-842 |
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Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Dye-sensitized solar cells (DSSCs) based on ZnO photoanodes have, despite extensive research, lagged behind cells based on TiO
2
, which is due to generally lower open-circuit voltages
V
OC
and fill factors. Here, DSSCs have been prepared using Mg-doped ZnO (MZO) photoanodes based on nanoparticles, thin films or ZnO-MZO core-shell-type nanoparticles with varying Mg-concentration. The cells were studied in detailed photoelectrochemical and photoluminescence experiments. It was confirmed that
V
OC
was significantly increased by Mg-doping. A clear influence of the Mg-concentration was also revealed on the transport and recombination of electrons in MZO, leading to a higher cell performance at low and lower cell performance at high concentrations of Mg in MZO. Nanoparticles with a pure ZnO core and an MZO shell offered a way to lower the influence of increased transport resistance in MZO and to capitalize on the significantly improved
V
OC
.
The bandgap of ZnO nanoparticulate photoanodes was increased by Mg-doping and the impact on photoelectrochemical characteristics in dye-sensitized solar cells is discussed. |
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ISSN: | 1463-9076 1463-9084 |
DOI: | 10.1039/d1cp00179e |