Fraunhofer Institute for Solar Energy Systems ISE
The spray technology is very simple, versatile and scalable in terms of plant engineering. A wide variety of materials (e.g. various oxides such as AlOx, SiOx, TiOx, as well as organic coatings) can be deposited under a wide range of process conditions and thus modified in their properties.
As an atmospheric process that enables high throughput based on inexpensive chemical precursors, wet chemical spraying meets the goals of the photovoltaic industry, which strives for low costs and fast processes.
In particular, we are developing processes for the deposition of functional layers for the production of perovskite solar cells. The focus is on the deposition of carrier-selective layers (e.g. MeO-2PACz) and the deposition of the organic part of the perovskite layer (e.g. FAI / FABr) on an inorganic scaffold layer by means of a hybrid process.
We also work on spray pyrolysis processes for the deposition of dielectric layers for various applications – whether as an optical layer or as a masking layer.
We characterize the layers produced using various (electron) optical and electrical measurement methods.
The following tools are available for the experimental work:
- Spray coater (in ambient air)
- Ultrasonic nozzle (40 kHz)
- Compressed air nozzles (various designs)
- Spray coater (in glovebox)
- Ultrasonic nozzles (various designs)
The experimental work is complemented by simulations.
