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According to the latest research, perovskite solar cells can be made by printing as a material solution, which can greatly reduce manufacturing costs, and there seems to be a conversion efficiency report of more than 20%, which will attract people's attention
as a new generation of solar cells.
The Kyoto University R&D team created perovskite solar cells with variable power generation characteristics and identified the loss mechanism
of current and voltage.
Based on the design guidelines obtained, it is expected that the energy conversion efficiency of crystalline silicon-type perovskite solar cells
will be realized.
The R&D team analyzed the power generation mechanism using perovskite solar cells with a conversion efficiency of more than 19%, and found that there was almost no conversion loss
in the current.
Voltage, on the other hand, has a voltage loss
in the area where the charge carrier carrying the current is captured (well region).
Therefore, if the density of the well region can be reduced below a certain level, the efficiency of current generation can reach almost 100%, and the voltage can be increased to the theoretical limit
.
In this study, a relatively dense and smooth perovskite film was fabricated, and elements with high efficiency and good reproducibility were realized
.
In addition, in order to study the influence of the particle size of the perovskite crystals that constitute the power generation layer on the change of power generation characteristics, a TiO2 dense film was used for the negative electrode to optimize the component structure
.
The larger the perovskite crystal particle size of perovskite solar cells, the greater the values of short-circuit current density (JSC), open-circuit voltage (VOC) and fill factor (FF), and the energy conversion efficiency reaches 19.
4%,
the world's highest level, at a maximum particle size of 500nm.
According to the latest research, perovskite solar cells can be made by printing as a material solution, which can greatly reduce manufacturing costs, and there seems to be a conversion efficiency report of more than 20%, which will attract people's attention
as a new generation of solar cells.
The Kyoto University R&D team created perovskite solar cells with variable power generation characteristics and identified the loss mechanism
of current and voltage.
Based on the design guidelines obtained, it is expected that the energy conversion efficiency of crystalline silicon-type perovskite solar cells
will be realized.
The R&D team analyzed the power generation mechanism using perovskite solar cells with a conversion efficiency of more than 19%, and found that there was almost no conversion loss
in the current.
Voltage, on the other hand, has a voltage loss
in the area where the charge carrier carrying the current is captured (well region).
Therefore, if the density of the well region can be reduced below a certain level, the efficiency of current generation can reach almost 100%, and the voltage can be increased to the theoretical limit
.
In this study, a relatively dense and smooth perovskite film was fabricated, and elements with high efficiency and good reproducibility were realized
.
In addition, in order to study the influence of the particle size of the perovskite crystals that constitute the power generation layer on the change of power generation characteristics, a TiO2 dense film was used for the negative electrode to optimize the component structure
.
The larger the perovskite crystal particle size of perovskite solar cells, the greater the values of short-circuit current density (JSC), open-circuit voltage (VOC) and fill factor (FF), and the energy conversion efficiency reaches 19.
4%,
the world's highest level, at a maximum particle size of 500nm.
