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[13p-P9-27] Perovskite Solar Cells Prepared by binder free TiO2 paste
Keywords:solar cell, titanium oxide
Organic–inorganic lead halide perovskite materials (e.g. CH3NH3PbI3) are paid much attention due to their excellent light-harvesting abilities. They exhibit a high power conversion efficiency (PCE) of over 20% in solar cells. After the pioneering work in liquid-state and solid-state solar cells, recent advancement are astonished. The advantages of solution-processability and cost-effectivity make them suitable for high throughput manufacture of large area solar cells.
Several methods for manufacturing a perovskite solar cells have been reported. A layer structure having a mesoporous layer of titanium oxide semiconductor are actively studied, because the mesoporous layer gives a high efficiency .
The formation of mesoporous metal oxide films usually requires a sintering process at high temperature (400–500 °C) by using a mesoscopic coating paste.
In contrast, binder-free paste or slurry have been developed for fabrication of plastic dye-sensitized solar cells. In this study, the low-temperature titanium oxide pastes were used for preparing a mesoporous layer. Generally, the low temperature paste does not require high temperature sintering to form mesoporous film. In this study, the dependence of sintering temperature of the mesoporous layer on energy conversion efficiencies were investigated.
The binder-free titania paste for low temperature coating consists of anatase having a particle diameter of 50nm ~ 60nm and brookite -type titanium oxide particle diameter 20nm. The paste was obtained by dispersing in a mixed solvent of tert-butanol and water .
This was diluted with ethanol to less than 5 weight %, followed by coating on FTO glass, which was coated with compact titanium oxide layer by a spin coater. Then, the temperature of the substrate , followed by heat treatment at different temperatures between 50 ℃ ~ 500 ℃ Perovskite layer was coated and hole transport layer was coated. The dependence of conversion efficiencies for the sintering temperature was investigated.
, A performance comparison with the perovskite solar cells of using a brookite type titanium oxide reported by our group were also demonstrated.
Several methods for manufacturing a perovskite solar cells have been reported. A layer structure having a mesoporous layer of titanium oxide semiconductor are actively studied, because the mesoporous layer gives a high efficiency .
The formation of mesoporous metal oxide films usually requires a sintering process at high temperature (400–500 °C) by using a mesoscopic coating paste.
In contrast, binder-free paste or slurry have been developed for fabrication of plastic dye-sensitized solar cells. In this study, the low-temperature titanium oxide pastes were used for preparing a mesoporous layer. Generally, the low temperature paste does not require high temperature sintering to form mesoporous film. In this study, the dependence of sintering temperature of the mesoporous layer on energy conversion efficiencies were investigated.
The binder-free titania paste for low temperature coating consists of anatase having a particle diameter of 50nm ~ 60nm and brookite -type titanium oxide particle diameter 20nm. The paste was obtained by dispersing in a mixed solvent of tert-butanol and water .
This was diluted with ethanol to less than 5 weight %, followed by coating on FTO glass, which was coated with compact titanium oxide layer by a spin coater. Then, the temperature of the substrate , followed by heat treatment at different temperatures between 50 ℃ ~ 500 ℃ Perovskite layer was coated and hole transport layer was coated. The dependence of conversion efficiencies for the sintering temperature was investigated.
, A performance comparison with the perovskite solar cells of using a brookite type titanium oxide reported by our group were also demonstrated.