| 초록 |
Zn2SnO4 nanoparticles (NPs) with a band gap of ~3.3 eV has been synthesized via a simple hydrothermal method using Na2CO3 as a new mineralizer. The effect of mineralizer concentrations on the formation, morphology and optical properties of Zn2SnO4 NPs are discussed. The as-synthesized Zn2SnO4 NPs exhibit no impurity phases such as SnO2 and ZnO. The average particle sizes of highly crystalline Zn2SnO4 NPs were controllable by adjusting the mineralizer concentration, which enabled a facile bandgap tuning. The influence of different mineralizers on the isoelectric point (IEP) of Zn2SnO4 NPs hydrothermally prepared using three different mineralizers, and the effect of the IEPs on the dye loading behavior of Zn2SnO4 based photoanodes in DSSCs are discussed. The IEPs were found to be 5.7, 7.4 and 8.1 for Zn2SnO4 NPs formed using Na2CO3, KOH and tert-butyl amine, respectively, suggesting that the surface properties of Zn2SnO4 NPs can be manipulated through the choice of the mineralizers. |
