Kanazawa uni team develops new TiO2 depo technique for perovskite solar

February 13 (Renewables Now) – Researchers at Kanazawa University in Japan have developed a simple and low-cost technique for inkjet deposition of titanium oxide (TiO2) in the making of perovskite solar cells.

The simple oblique electrostatic inkjet (OEI) approach does not require vacuum and allows for the production of efficient photovoltaic (PV) cells. 

Solar cells made using our approach had power-conversion efficiencies of up to 13.19%, which, given the other advantages of our technique, is very promising for scale-up and commercialization,” said study lead author Assistant Professor Md. Shahiduzzaman.

The technique is based on the deposition of positively charged droplets that are attracted to a negatively charged surface. The team discovered that they can eliminate the effect of gravity, resulting in the deposition of a more uniform layer, by spraying the TiO2 precursor at an angle of 45 degrees. The thickness of the layer can be controlled by manipulating coating times.

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