首页|Cu2AgInS4 quantum dot sensitized zinc doped Titania nanoparticles film as the high efficient photoanode for photovoltaic cells
Cu2AgInS4 quantum dot sensitized zinc doped Titania nanoparticles film as the high efficient photoanode for photovoltaic cells
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NSTL
Elsevier
In this work, Cu, Ag, In, and S based qu aternary quantum dots (Cu2AgInS4 QDs) were synthesized by a hot-injection method, and Zinc doped (0, 1, and 2 wt%) Titania nanoparticles (Zn-TiO2 NPs) were synthesized by a sol-gel method. The synthesized QDs were anchored onto Zn-TiO2 NPs film through a linker-based assembly method to form Cu2AgInS4 QDs/Zn-TiO2 NPs to use as the photoanodes for Quantum dot sensitized solar cells (QDSCs). The physio-chemical behavior of the Cu2AgInS4 QDs, Zn-TiO2 NPs, and Cu2AgInS4 QDs/Zn-TiO2 photoanodes was examined by various spectroscopic analyses. Optical analysis of the fabricated photoanodes revealed that Cu2AgInS4 QDs/Zn-TiO2 NPs photoanode has a high redshift of light absorbance than Zn-TiO2 NPs. Moreover, due to the proper band alignment of Cu2AgInS4 QDs and 2 wt% Zn-TiO2 NPs, Cu2AgInS4 QDs/Zn-TiO2 NPs has high electron transfer ability than Cu2AgInS4 QDs/TiO2 NPs. On the other hand, the electrochemical impedance analysis confirms that Cu2AgInS4 QDs/Zn-TiO2 photoanode has lower charge transfer resistance (9.53 ohm) with high photocatalytic behavior than that of Cu2AgInS4 QDs/ TiO2 NPs as the photoanode. Hence Cu2AgInS4 QDs/Zn-TiO2 NPs photoanode based QDSC shows 36% improvement in the photoconversion efficiency (5.43%) than that of Cu2AgInS4 QDs/TiO2 NPs (3.92%) based QDSC.
NSTL
Elsevier
