Kyoto Univ: Window glass power generation: Inorganic compound transparent solar cell
-Transparent solar cells using infrared light-
-Conventional solar cells use visible light-
Utilizing the infrared light of sunlight:
Infrared light accounts for 44% of the sunlight.
Not only is the wavelength long and invisible to the human eye
It contributed to the heat island phenomenon
It causes heat stroke in the human body.
Infrared light energy conversion:
Energy conversion of infrared light has been tried so far.
However, the efficiency is low and it has been considered impossible to realize.
Solar power generation with infrared light:
Kyoto University Institute for Chemical Research
Associate Professor Masanori Sakamoto
For energy conversion, we have developed “nano-sized small particles as an infrared absorber”.
By trying with various nanoparticles,
With much higher efficiency than ever before
We succeeded in producing hydrogen as a fuel from infrared light.
Transparent solar cell market:
In fact, transparent solar cells already exist in the world.
It is said that it will increase to 2.5 trillion yen in 2025.
Conventional transparent solar cells are “materials that use organic substances to absorb light”,
The transparent solar cell this time is “a material that absorbs light and is made of an inorganic compound.”
Transparent solar cells made of inorganic compounds:
If you use inorganic compounds,
Excellent daylighting even when used on the glass wall of a building
The heat island can be softened to absorb the heat rays.
It does not deteriorate and can be used for a long time.
There are great expectations for solar power generation that produces power generation and energy saving effects.
5% improvement in conversion efficiency:
Currently, “the power generation efficiency of transparent solar cells using inorganic compounds is 1%.”
If you improve the conversion efficiency to 5%,
When installing a transparent power generation window glass in a high-rise building
It is said that it can cover the amount of electricity for lighting on all floors of the building.
Social implementation in 2027
This initiative was adopted by the Kyoto University Incubation Program.
In October 2021, OPTMASS Co., Ltd. was established as a university-launched venture company.
The goal is social implementation in 2027.
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