- Close to 25% conversion efficiency has been discovered for organic PV cells in a joint research
- CEA and Toyobo claim this efficiency level is the world’s top level conversion efficiency in a dim room
- Toyobo provided a power generating material it has made for the joint research
- The team also completed prototype OPV modules on a PET film substrate leading to an output of about 130 microwatts under the same illumination
French government research institute CEA and Japanese fiber and textile company Toyobo have released the results of their joint research conducted over a period of 6 months since June 2019 in making trial organic PV (OPV) small cells on a glass substrate. They discovered close to 25% conversion efficiency, or 60% higher than that of amorphous silicon solar cells commonly used for desktop calculators. They claim this to be the world’s top level conversion efficiency in a dim room.
“In a verification experiment under neon lighting with 220 lux, equivalent to the brightness of a dark room, the Power-generating material for OPV OPV module on PET film substrate trial product was confirmed to have attained a conversion efficiency of about 25%, or 60 higher than that of amorphous silicon solar cells commonly used for desktop calculators,” claim the researchers.
The team was also able to have completed prototype OPV modules on a PET film substrate with an effective area of 18 cm, although coating a power-generating material on a PET film, that generated an output about 130 microwatts under the same illumination.
A Toyobo made power generating material, which it does not name, was used for the trial. This material, it claims, can dissolve in halogen-free solvants and hence can be coated evenly on a substrate.
Toyobo says it plans to propose this material mainly to solar cell makers and also use it mainly for wireless power source in devices such as temperature-humidity and motion sensors. By March 2023, it aims to have the material ready.